diff --git a/airbyte-config/init/src/main/resources/config/STANDARD_SOURCE_DEFINITION/789f8e7a-2d28-11ec-8d3d-0242ac130003.json b/airbyte-config/init/src/main/resources/config/STANDARD_SOURCE_DEFINITION/789f8e7a-2d28-11ec-8d3d-0242ac130003.json
new file mode 100644
index 000000000000..a2dc9b1479a0
--- /dev/null
+++ b/airbyte-config/init/src/main/resources/config/STANDARD_SOURCE_DEFINITION/789f8e7a-2d28-11ec-8d3d-0242ac130003.json
@@ -0,0 +1,7 @@
+{
+  "sourceDefinitionId": "789f8e7a-2d28-11ec-8d3d-0242ac130003",
+  "name": "Lemlist",
+  "dockerRepository": "airbyte/source-lemlist",
+  "dockerImageTag": "0.1.0",
+  "documentationUrl": "https://docs.airbyte.io/integrations/sources/lemlist"
+}
diff --git a/airbyte-config/init/src/main/resources/seed/source_definitions.yaml b/airbyte-config/init/src/main/resources/seed/source_definitions.yaml
index ded5a1878541..4279e6baa258 100644
--- a/airbyte-config/init/src/main/resources/seed/source_definitions.yaml
+++ b/airbyte-config/init/src/main/resources/seed/source_definitions.yaml
@@ -16,6 +16,12 @@
   dockerImageTag: 0.2.0
   sourceType: api
   documentationUrl: https://docs.airbyte.io/integrations/sources/amazon-seller-partner
+- sourceDefinitionId: 983fd355-6bf3-4709-91b5-37afa391eeb6
+  name: Amazon SQS
+  dockerRepository: airbyte/source-amazon-sqs
+  dockerImageTag: 0.1.0
+  documentationUrl: https://docs.airbyte.io/integrations/sources/amazon-sqs
+  sourceType: api
 - name: Amplitude
   sourceDefinitionId: fa9f58c6-2d03-4237-aaa4-07d75e0c1396
   dockerRepository: airbyte/source-amplitude
@@ -265,6 +271,12 @@
   dockerImageTag: 0.1.2
   documentationUrl: https://docs.airbyte.io/integrations/sources/klaviyo
   sourceType: api
+- sourceDefinitionId: 789f8e7a-2d28-11ec-8d3d-0242ac130003
+  name: Lemlist
+  dockerRepository: airbyte/source-lemlist
+  dockerImageTag: 0.1.0
+  documentationUrl: https://docs.airbyte.io/integrations/sources/source-lemlist
+  sourceType: api
 - name: Lever Hiring
   sourceDefinitionId: 3981c999-bd7d-4afc-849b-e53dea90c948
   dockerRepository: airbyte/source-lever-hiring
@@ -577,10 +589,4 @@
   dockerRepository: airbyte/source-zuora
   dockerImageTag: 0.1.3
   documentationUrl: https://docs.airbyte.io/integrations/sources/zuora
-  sourceType: api
-- sourceDefinitionId: 983fd355-6bf3-4709-91b5-37afa391eeb6
-  name: Amazon SQS
-  dockerRepository: airbyte/source-amazon-sqs
-  dockerImageTag: 0.1.0
-  documentationUrl: https://docs.airbyte.io/integrations/sources/amazon-sqs
-  sourceType: api
+  sourceType: api
\ No newline at end of file
diff --git a/airbyte-integrations/builds.md b/airbyte-integrations/builds.md
index e40459b5c044..e64b38864e7a 100644
--- a/airbyte-integrations/builds.md
+++ b/airbyte-integrations/builds.md
@@ -46,6 +46,7 @@
 | Kafka   | [![source-kafka](https://img.shields.io/endpoint?url=https%3A%2F%2Fdnsgjos7lj2fu.cloudfront.net%2Ftests%2Fsummary%2Fsource-kafka%2Fbadge.json)](https://dnsgjos7lj2fu.cloudfront.net/tests/summary/source-kafka) |
 | Klaviyo   | [![source-klaviyo](https://img.shields.io/endpoint?url=https%3A%2F%2Fdnsgjos7lj2fu.cloudfront.net%2Ftests%2Fsummary%2Fsource-klaviyo%2Fbadge.json)](https://dnsgjos7lj2fu.cloudfront.net/tests/summary/source-klaviyo) |
 | Kustomer | [![source-kustomer-singer](https://img.shields.io/endpoint?url=https%3A%2F%2Fdnsgjos7lj2fu.cloudfront.net%2Ftests%2Fsummary%2Fsource-kustomer-singer%2Fbadge.json)](https://dnsgjos7lj2fu.cloudfront.net/tests/summary/source-kustomer-singer) |
+| Lemlist | [![source-lemlist](https://img.shields.io/endpoint?url=https%3A%2F%2Fdnsgjos7lj2fu.cloudfront.net%2Ftests%2Fsummary%2Fsource-lemlist%2Fbadge.json)](https://dnsgjos7lj2fu.cloudfront.net/tests/summary/source-lemlist) |
 | Mailchimp   | [![source-mailchimp](https://img.shields.io/endpoint?url=https%3A%2F%2Fdnsgjos7lj2fu.cloudfront.net%2Ftests%2Fsummary%2Fsource-mailchimp%2Fbadge.json)](https://dnsgjos7lj2fu.cloudfront.net/tests/summary/source-mailchimp) |
 | Marketo   | [![source-marketo](https://img.shields.io/endpoint?url=https%3A%2F%2Fdnsgjos7lj2fu.cloudfront.net%2Ftests%2Fsummary%2Fsource-marketo%2Fbadge.json)](https://dnsgjos7lj2fu.cloudfront.net/tests/summary/source-marketo) |
 | Microsoft SQL Server \(MSSQL\)   | [![source-mssql](https://img.shields.io/endpoint?url=https%3A%2F%2Fdnsgjos7lj2fu.cloudfront.net%2Ftests%2Fsummary%2Fsource-mssql%2Fbadge.json)](https://dnsgjos7lj2fu.cloudfront.net/tests/summary/source-mssql) |
diff --git a/airbyte-integrations/connectors/source-lemlist/.dockerignore b/airbyte-integrations/connectors/source-lemlist/.dockerignore
new file mode 100644
index 000000000000..880323ffc755
--- /dev/null
+++ b/airbyte-integrations/connectors/source-lemlist/.dockerignore
@@ -0,0 +1,7 @@
+*
+!Dockerfile
+!Dockerfile.test
+!main.py
+!source_lemlist
+!setup.py
+!secrets
diff --git a/airbyte-integrations/connectors/source-lemlist/Dockerfile b/airbyte-integrations/connectors/source-lemlist/Dockerfile
new file mode 100644
index 000000000000..650f683c6886
--- /dev/null
+++ b/airbyte-integrations/connectors/source-lemlist/Dockerfile
@@ -0,0 +1,38 @@
+FROM python:3.7.11-alpine3.14 as base
+
+# build and load all requirements
+FROM base as builder
+WORKDIR /airbyte/integration_code
+
+# upgrade pip to the latest version
+RUN apk --no-cache upgrade \
+    && pip install --upgrade pip \
+    && apk --no-cache add tzdata build-base
+
+
+COPY setup.py ./
+# install necessary packages to a temporary folder
+RUN pip install --prefix=/install .
+
+# build a clean environment
+FROM base
+WORKDIR /airbyte/integration_code
+
+# copy all loaded and built libraries to a pure basic image
+COPY --from=builder /install /usr/local
+# add default timezone settings
+COPY --from=builder /usr/share/zoneinfo/Etc/UTC /etc/localtime
+RUN echo "Etc/UTC" > /etc/timezone
+
+# bash is installed for more convenient debugging.
+RUN apk --no-cache add bash
+
+# copy payload code only
+COPY main.py ./
+COPY source_lemlist ./source_lemlist
+
+ENV AIRBYTE_ENTRYPOINT "python /airbyte/integration_code/main.py"
+ENTRYPOINT ["python", "/airbyte/integration_code/main.py"]
+
+LABEL io.airbyte.version=0.1.0
+LABEL io.airbyte.name=airbyte/source-lemlist
diff --git a/airbyte-integrations/connectors/source-lemlist/README.md b/airbyte-integrations/connectors/source-lemlist/README.md
new file mode 100644
index 000000000000..702b50b8c1ea
--- /dev/null
+++ b/airbyte-integrations/connectors/source-lemlist/README.md
@@ -0,0 +1,132 @@
+# Lemlist Source
+
+This is the repository for the Lemlist source connector, written in Python.
+For information about how to use this connector within Airbyte, see [the documentation](https://docs.airbyte.io/integrations/sources/lemlist).
+
+## Local development
+
+### Prerequisites
+**To iterate on this connector, make sure to complete this prerequisites section.**
+
+#### Minimum Python version required `= 3.7.0`
+
+#### Build & Activate Virtual Environment and install dependencies
+From this connector directory, create a virtual environment:
+```
+python -m venv .venv
+```
+
+This will generate a virtualenv for this module in `.venv/`. Make sure this venv is active in your
+development environment of choice. To activate it from the terminal, run:
+```
+source .venv/bin/activate
+pip install -r requirements.txt
+pip install '.[tests]'
+```
+If you are in an IDE, follow your IDE's instructions to activate the virtualenv.
+
+Note that while we are installing dependencies from `requirements.txt`, you should only edit `setup.py` for your dependencies. `requirements.txt` is
+used for editable installs (`pip install -e`) to pull in Python dependencies from the monorepo and will call `setup.py`.
+If this is mumbo jumbo to you, don't worry about it, just put your deps in `setup.py` but install using `pip install -r requirements.txt` and everything
+should work as you expect.
+
+#### Building via Gradle
+You can also build the connector in Gradle. This is typically used in CI and not needed for your development workflow.
+
+To build using Gradle, from the Airbyte repository root, run:
+```
+./gradlew :airbyte-integrations:connectors:source-lemlist:build
+```
+
+#### Create credentials
+**If you are a community contributor**, follow the instructions in the [documentation](https://docs.airbyte.io/integrations/sources/lemlist)
+to generate the necessary credentials. Then create a file `secrets/config.json` conforming to the `source_lemlist/spec.json` file.
+Note that any directory named `secrets` is gitignored across the entire Airbyte repo, so there is no danger of accidentally checking in sensitive information.
+See `integration_tests/sample_config.json` for a sample config file.
+
+**If you are an Airbyte core member**, copy the credentials in Lastpass under the secret name `source lemlist test creds`
+and place them into `secrets/config.json`.
+
+### Locally running the connector
+```
+python main.py spec
+python main.py check --config secrets/config.json
+python main.py discover --config secrets/config.json
+python main.py read --config secrets/config.json --catalog integration_tests/configured_catalog.json
+```
+
+### Locally running the connector docker image
+
+#### Build
+First, make sure you build the latest Docker image:
+```
+docker build . -t airbyte/source-lemlist:dev
+```
+
+You can also build the connector image via Gradle:
+```
+./gradlew :airbyte-integrations:connectors:source-lemlist:airbyteDocker
+```
+When building via Gradle, the docker image name and tag, respectively, are the values of the `io.airbyte.name` and `io.airbyte.version` `LABEL`s in
+the Dockerfile.
+
+#### Run
+Then run any of the connector commands as follows:
+```
+docker run --rm airbyte/source-lemlist:dev spec
+docker run --rm -v $(pwd)/secrets:/secrets airbyte/source-lemlist:dev check --config /secrets/config.json
+docker run --rm -v $(pwd)/secrets:/secrets airbyte/source-lemlist:dev discover --config /secrets/config.json
+docker run --rm -v $(pwd)/secrets:/secrets -v $(pwd)/integration_tests:/integration_tests airbyte/source-lemlist:dev read --config /secrets/config.json --catalog /integration_tests/configured_catalog.json
+```
+## Testing
+Make sure to familiarize yourself with [pytest test discovery](https://docs.pytest.org/en/latest/goodpractices.html#test-discovery) to know how your test files and methods should be named.
+First install test dependencies into your virtual environment:
+```
+pip install .[tests]
+```
+### Unit Tests
+To run unit tests locally, from the connector directory run:
+```
+python -m pytest unit_tests
+```
+
+### Integration Tests
+There are two types of integration tests: Acceptance Tests (Airbyte's test suite for all source connectors) and custom integration tests (which are specific to this connector).
+#### Custom Integration tests
+Place custom tests inside `integration_tests/` folder, then, from the connector root, run
+```
+python -m pytest integration_tests
+```
+#### Acceptance Tests
+Customize `acceptance-test-config.yml` file to configure tests. See [Source Acceptance Tests](https://docs.airbyte.io/connector-development/testing-connectors/source-acceptance-tests-reference) for more information.
+If your connector requires to create or destroy resources for use during acceptance tests create fixtures for it and place them inside integration_tests/acceptance.py.
+To run your integration tests with acceptance tests, from the connector root, run
+```
+python -m pytest integration_tests -p integration_tests.acceptance
+```
+To run your integration tests with docker
+
+### Using gradle to run tests
+All commands should be run from airbyte project root.
+To run unit tests:
+```
+./gradlew :airbyte-integrations:connectors:source-lemlist:unitTest
+```
+To run acceptance and custom integration tests:
+```
+./gradlew :airbyte-integrations:connectors:source-lemlist:integrationTest
+```
+
+## Dependency Management
+All of your dependencies should go in `setup.py`, NOT `requirements.txt`. The requirements file is only used to connect internal Airbyte dependencies in the monorepo for local development.
+We split dependencies between two groups, dependencies that are:
+* required for your connector to work need to go to `MAIN_REQUIREMENTS` list.
+* required for the testing need to go to `TEST_REQUIREMENTS` list
+
+### Publishing a new version of the connector
+You've checked out the repo, implemented a million dollar feature, and you're ready to share your changes with the world. Now what?
+1. Make sure your changes are passing unit and integration tests.
+1. Bump the connector version in `Dockerfile` -- just increment the value of the `LABEL io.airbyte.version` appropriately (we use [SemVer](https://semver.org/)).
+1. Create a Pull Request.
+1. Pat yourself on the back for being an awesome contributor.
+1. Someone from Airbyte will take a look at your PR and iterate with you to merge it into master.
diff --git a/airbyte-integrations/connectors/source-lemlist/acceptance-test-config.yml b/airbyte-integrations/connectors/source-lemlist/acceptance-test-config.yml
new file mode 100644
index 000000000000..39155271a6b6
--- /dev/null
+++ b/airbyte-integrations/connectors/source-lemlist/acceptance-test-config.yml
@@ -0,0 +1,18 @@
+connector_image: airbyte/source-lemlist:dev
+tests:
+  spec:
+    - spec_path: "source_lemlist/spec.json"
+  connection:
+    - config_path: "secrets/config.json"
+      status: "succeed"
+    - config_path: "integration_tests/invalid_config.json"
+      status: "failed"
+  discovery:
+    - config_path: "secrets/config.json"
+  basic_read:
+    - config_path: "secrets/config.json"
+      configured_catalog_path: "integration_tests/configured_catalog.json"
+      empty_streams: ["campaigns", "activities", "unsubscribes"]
+  full_refresh:
+    - config_path: "secrets/config.json"
+      configured_catalog_path: "integration_tests/configured_catalog.json"
diff --git a/airbyte-integrations/connectors/source-lemlist/acceptance-test-docker.sh b/airbyte-integrations/connectors/source-lemlist/acceptance-test-docker.sh
new file mode 100644
index 000000000000..e4d8b1cef896
--- /dev/null
+++ b/airbyte-integrations/connectors/source-lemlist/acceptance-test-docker.sh
@@ -0,0 +1,16 @@
+#!/usr/bin/env sh
+
+# Build latest connector image
+docker build . -t $(cat acceptance-test-config.yml | grep "connector_image" | head -n 1 | cut -d: -f2)
+
+# Pull latest acctest image
+docker pull airbyte/source-acceptance-test:latest
+
+# Run
+docker run --rm -it \
+    -v /var/run/docker.sock:/var/run/docker.sock \
+    -v /tmp:/tmp \
+    -v $(pwd):/test_input \
+    airbyte/source-acceptance-test \
+    --acceptance-test-config /test_input
+
diff --git a/airbyte-integrations/connectors/source-lemlist/bootstrap.md b/airbyte-integrations/connectors/source-lemlist/bootstrap.md
new file mode 100644
index 000000000000..fde382598176
--- /dev/null
+++ b/airbyte-integrations/connectors/source-lemlist/bootstrap.md
@@ -0,0 +1,26 @@
+# Lemlist
+
+## API Reference
+
+API Docs: https://developer.lemlist.com/#introduction
+
+## Overview
+
+Lemlist is your sales automation and cold email software. Using its API you can retrieve information about campaigns, activities and unsubscribes. 
+
+- Lemlist API uses Basic Authentication.
+- Pagination is offset-based.
+- It uses fixed-window rate limiting strategy.
+
+## Endpoints
+
+Lemlist API consists of four endpoints which can be extracted data from:
+
+ 1. **Team**: This endpoint retrieves information of your team.
+ 2. **Campaigns**: This endpoint retrieves the list of all campaigns.
+ 3. **Activities**: This endpoint retrieves the last 100 activities.
+ 4. **Unsubscribes**: This endpoint retrieves the list of all people who are unsubscribed.
+
+## Notes
+
+- The API doesn't have any way to filter information so it doesn't support incremental syncs.
diff --git a/airbyte-integrations/connectors/source-lemlist/build.gradle b/airbyte-integrations/connectors/source-lemlist/build.gradle
new file mode 100644
index 000000000000..f22f0eb5697c
--- /dev/null
+++ b/airbyte-integrations/connectors/source-lemlist/build.gradle
@@ -0,0 +1,14 @@
+plugins {
+    id 'airbyte-python'
+    id 'airbyte-docker'
+    id 'airbyte-source-acceptance-test'
+}
+
+airbytePython {
+    moduleDirectory 'source_lemlist'
+}
+
+dependencies {
+    implementation files(project(':airbyte-integrations:bases:source-acceptance-test').airbyteDocker.outputs)
+    implementation files(project(':airbyte-integrations:bases:base-python').airbyteDocker.outputs)
+}
diff --git a/airbyte-integrations/connectors/source-lemlist/integration_tests/__init__.py b/airbyte-integrations/connectors/source-lemlist/integration_tests/__init__.py
new file mode 100644
index 000000000000..46b7376756ec
--- /dev/null
+++ b/airbyte-integrations/connectors/source-lemlist/integration_tests/__init__.py
@@ -0,0 +1,3 @@
+#
+# Copyright (c) 2021 Airbyte, Inc., all rights reserved.
+#
diff --git a/airbyte-integrations/connectors/source-lemlist/integration_tests/acceptance.py b/airbyte-integrations/connectors/source-lemlist/integration_tests/acceptance.py
new file mode 100644
index 000000000000..108075487440
--- /dev/null
+++ b/airbyte-integrations/connectors/source-lemlist/integration_tests/acceptance.py
@@ -0,0 +1,14 @@
+#
+# Copyright (c) 2021 Airbyte, Inc., all rights reserved.
+#
+
+
+import pytest
+
+pytest_plugins = ("source_acceptance_test.plugin",)
+
+
+@pytest.fixture(scope="session", autouse=True)
+def connector_setup():
+    """ This fixture is a placeholder for external resources that acceptance test might require."""
+    yield
diff --git a/airbyte-integrations/connectors/source-lemlist/integration_tests/configured_catalog.json b/airbyte-integrations/connectors/source-lemlist/integration_tests/configured_catalog.json
new file mode 100644
index 000000000000..6fdac40ccc0f
--- /dev/null
+++ b/airbyte-integrations/connectors/source-lemlist/integration_tests/configured_catalog.json
@@ -0,0 +1,40 @@
+{
+  "streams": [
+    {
+      "stream": {
+        "name": "team",
+        "json_schema": {},
+        "supported_sync_modes": ["full_refresh"]
+      },
+      "sync_mode": "full_refresh",
+      "destination_sync_mode": "overwrite"
+    },
+    {
+      "stream": {
+        "name": "campaigns",
+        "json_schema": {},
+        "supported_sync_modes": ["full_refresh"]
+      },
+      "sync_mode": "full_refresh",
+      "destination_sync_mode": "overwrite"
+    },
+    {
+      "stream": {
+        "name": "activities",
+        "json_schema": {},
+        "supported_sync_modes": ["full_refresh"]
+      },
+      "sync_mode": "full_refresh",
+      "destination_sync_mode": "overwrite"
+    },
+    {
+      "stream": {
+        "name": "unsubscribes",
+        "json_schema": {},
+        "supported_sync_modes": ["full_refresh"]
+      },
+      "sync_mode": "full_refresh",
+      "destination_sync_mode": "overwrite"
+    }
+  ]
+}
diff --git a/airbyte-integrations/connectors/source-lemlist/integration_tests/invalid_config.json b/airbyte-integrations/connectors/source-lemlist/integration_tests/invalid_config.json
new file mode 100644
index 000000000000..89993539f0df
--- /dev/null
+++ b/airbyte-integrations/connectors/source-lemlist/integration_tests/invalid_config.json
@@ -0,0 +1,3 @@
+{
+  "api_key": "<fake-api-key>"
+}
diff --git a/airbyte-integrations/connectors/source-lemlist/integration_tests/sample_config.json b/airbyte-integrations/connectors/source-lemlist/integration_tests/sample_config.json
new file mode 100644
index 000000000000..73112f5a25a7
--- /dev/null
+++ b/airbyte-integrations/connectors/source-lemlist/integration_tests/sample_config.json
@@ -0,0 +1,3 @@
+{
+  "api_key": "<api_key>"
+}
diff --git a/airbyte-integrations/connectors/source-lemlist/main.py b/airbyte-integrations/connectors/source-lemlist/main.py
new file mode 100644
index 000000000000..2951ed0cb4c5
--- /dev/null
+++ b/airbyte-integrations/connectors/source-lemlist/main.py
@@ -0,0 +1,13 @@
+#
+# Copyright (c) 2021 Airbyte, Inc., all rights reserved.
+#
+
+
+import sys
+
+from airbyte_cdk.entrypoint import launch
+from source_lemlist import SourceLemlist
+
+if __name__ == "__main__":
+    source = SourceLemlist()
+    launch(source, sys.argv[1:])
diff --git a/airbyte-integrations/connectors/source-lemlist/requirements.txt b/airbyte-integrations/connectors/source-lemlist/requirements.txt
new file mode 100644
index 000000000000..0411042aa091
--- /dev/null
+++ b/airbyte-integrations/connectors/source-lemlist/requirements.txt
@@ -0,0 +1,2 @@
+-e ../../bases/source-acceptance-test
+-e .
diff --git a/airbyte-integrations/connectors/source-lemlist/sample_files/configured_catalog.json b/airbyte-integrations/connectors/source-lemlist/sample_files/configured_catalog.json
new file mode 100644
index 000000000000..6fdac40ccc0f
--- /dev/null
+++ b/airbyte-integrations/connectors/source-lemlist/sample_files/configured_catalog.json
@@ -0,0 +1,40 @@
+{
+  "streams": [
+    {
+      "stream": {
+        "name": "team",
+        "json_schema": {},
+        "supported_sync_modes": ["full_refresh"]
+      },
+      "sync_mode": "full_refresh",
+      "destination_sync_mode": "overwrite"
+    },
+    {
+      "stream": {
+        "name": "campaigns",
+        "json_schema": {},
+        "supported_sync_modes": ["full_refresh"]
+      },
+      "sync_mode": "full_refresh",
+      "destination_sync_mode": "overwrite"
+    },
+    {
+      "stream": {
+        "name": "activities",
+        "json_schema": {},
+        "supported_sync_modes": ["full_refresh"]
+      },
+      "sync_mode": "full_refresh",
+      "destination_sync_mode": "overwrite"
+    },
+    {
+      "stream": {
+        "name": "unsubscribes",
+        "json_schema": {},
+        "supported_sync_modes": ["full_refresh"]
+      },
+      "sync_mode": "full_refresh",
+      "destination_sync_mode": "overwrite"
+    }
+  ]
+}
diff --git a/airbyte-integrations/connectors/source-lemlist/setup.py b/airbyte-integrations/connectors/source-lemlist/setup.py
new file mode 100644
index 000000000000..b54f3371b817
--- /dev/null
+++ b/airbyte-integrations/connectors/source-lemlist/setup.py
@@ -0,0 +1,25 @@
+#
+# Copyright (c) 2021 Airbyte, Inc., all rights reserved.
+#
+
+
+from setuptools import find_packages, setup
+
+MAIN_REQUIREMENTS = [
+    "airbyte-cdk",
+]
+
+TEST_REQUIREMENTS = ["pytest~=6.2.5", "pytest-mock~=3.6.1", "source-acceptance-test", "responses~=0.14.0"]
+
+setup(
+    name="source_lemlist",
+    description="Source implementation for Lemlist.",
+    author="Airbyte",
+    author_email="contact@airbyte.io",
+    packages=find_packages(),
+    install_requires=MAIN_REQUIREMENTS,
+    package_data={"": ["*.json", "schemas/*.json", "schemas/shared/*.json"]},
+    extras_require={
+        "tests": TEST_REQUIREMENTS,
+    },
+)
diff --git a/airbyte-integrations/connectors/source-lemlist/source_lemlist/__init__.py b/airbyte-integrations/connectors/source-lemlist/source_lemlist/__init__.py
new file mode 100644
index 000000000000..e7567c6c38da
--- /dev/null
+++ b/airbyte-integrations/connectors/source-lemlist/source_lemlist/__init__.py
@@ -0,0 +1,8 @@
+#
+# Copyright (c) 2021 Airbyte, Inc., all rights reserved.
+#
+
+
+from .source import SourceLemlist
+
+__all__ = ["SourceLemlist"]
diff --git a/airbyte-integrations/connectors/source-lemlist/source_lemlist/auth.py b/airbyte-integrations/connectors/source-lemlist/source_lemlist/auth.py
new file mode 100644
index 000000000000..f7f3ccd81b07
--- /dev/null
+++ b/airbyte-integrations/connectors/source-lemlist/source_lemlist/auth.py
@@ -0,0 +1,15 @@
+#
+# Copyright (c) 2021 Airbyte, Inc., all rights reserved.
+#
+
+import base64
+from typing import Tuple
+
+from airbyte_cdk.sources.streams.http.auth import TokenAuthenticator
+
+
+class HttpBasicAuthenticator(TokenAuthenticator):
+    def __init__(self, auth: Tuple[str, str], auth_method: str = "Basic", **kwargs):
+        auth_string = f"{auth[0]}:{auth[1]}".encode("utf8")
+        b64_encoded = base64.b64encode(auth_string).decode("utf8")
+        super().__init__(token=b64_encoded, auth_method=auth_method, **kwargs)
diff --git a/airbyte-integrations/connectors/source-lemlist/source_lemlist/schemas/activities.json b/airbyte-integrations/connectors/source-lemlist/source_lemlist/schemas/activities.json
new file mode 100644
index 000000000000..4b3e8d7e0435
--- /dev/null
+++ b/airbyte-integrations/connectors/source-lemlist/source_lemlist/schemas/activities.json
@@ -0,0 +1,98 @@
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "type": "object",
+  "properties": {
+    "_id": {
+      "type": "string"
+    },
+    "type": {
+      "type": ["null", "string"]
+    },
+    "teamId": {
+      "type": ["null", "string"]
+    },
+    "createdAt": {
+      "type": ["null", "string"]
+    },
+    "leadId": {
+      "type": ["null", "string"]
+    },
+    "leadEmail": {
+      "type": ["null", "string"]
+    },
+    "campaignId": {
+      "type": ["null", "string"]
+    },
+    "createdBy": {
+      "type": ["null", "string"]
+    },
+    "leadFirstName": {
+      "type": ["null", "string"]
+    },
+    "leadLastName": {
+      "type": ["null", "string"]
+    },
+    "sequenceId": {
+      "type": ["null", "string"]
+    },
+    "isFirst": {
+      "type": ["null", "boolean"]
+    },
+    "sequenceStep": {
+      "type": ["null", "integer"]
+    },
+    "emailTemplateId": {
+      "type": ["null", "string"]
+    },
+    "extra": {
+      "type": ["null", "object"],
+      "properties": {
+        "userName": {
+          "type": ["null", "string"]
+        },
+        "leadPhone": {
+          "type": ["null", "string"]
+        },
+        "sendUserId": {
+          "type": ["null", "string"]
+        },
+        "leadPicture": {
+          "type": ["null", "string"]
+        },
+        "leadCompanyName": {
+          "type": ["null", "string"]
+        }
+      }
+    },
+    "firstName": {
+      "type": ["null", "string"]
+    },
+    "lastName": {
+      "type": ["null", "string"]
+    },
+    "email": {
+      "type": ["null", "string"]
+    },
+    "companyName": {
+      "type": ["null", "string"]
+    },
+    "picture": {
+      "type": ["null", "string"]
+    },
+    "phone": {
+      "type": ["null", "string"]
+    },
+    "linkedinUrl": {
+      "type": ["null", "string"]
+    },
+    "icebreaker": {
+      "type": ["null", "string"]
+    },
+    "campaignName": {
+      "type": ["null", "string"]
+    },
+    "emailTemplateName": {
+      "type": ["null", "string"]
+    }
+  }
+}
diff --git a/airbyte-integrations/connectors/source-lemlist/source_lemlist/schemas/campaigns.json b/airbyte-integrations/connectors/source-lemlist/source_lemlist/schemas/campaigns.json
new file mode 100644
index 000000000000..5a29bc49c33b
--- /dev/null
+++ b/airbyte-integrations/connectors/source-lemlist/source_lemlist/schemas/campaigns.json
@@ -0,0 +1,18 @@
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "type": "object",
+  "properties": {
+    "_id": {
+      "type": "string"
+    },
+    "name": {
+      "type": ["null", "string"]
+    },
+    "labels": {
+      "type": ["null", "array"],
+      "items": {
+        "type": "string"
+      }
+    }
+  }
+}
diff --git a/airbyte-integrations/connectors/source-lemlist/source_lemlist/schemas/team.json b/airbyte-integrations/connectors/source-lemlist/source_lemlist/schemas/team.json
new file mode 100644
index 000000000000..5fe12ac770c5
--- /dev/null
+++ b/airbyte-integrations/connectors/source-lemlist/source_lemlist/schemas/team.json
@@ -0,0 +1,41 @@
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "type": "object",
+  "properties": {
+    "_id": {
+      "type": "string"
+    },
+    "name": {
+      "type": ["null", "string"]
+    },
+    "userIds": {
+      "type": ["null", "array"],
+      "items": {
+        "type": "string"
+      }
+    },
+    "createdBy": {
+      "type": ["null", "string"]
+    },
+    "createdAt": {
+      "type": ["null", "string"]
+    },
+    "apiKey": {
+      "type": ["null", "string"]
+    },
+    "billing": {
+      "type": ["null", "object"],
+      "properties": {
+        "quantity": {
+          "type": ["null", "integer"]
+        },
+        "ok": {
+          "type": ["null", "boolean"]
+        },
+        "plan": {
+          "type": ["null", "string"]
+        }
+      }
+    }
+  }
+}
diff --git a/airbyte-integrations/connectors/source-lemlist/source_lemlist/schemas/unsubscribes.json b/airbyte-integrations/connectors/source-lemlist/source_lemlist/schemas/unsubscribes.json
new file mode 100644
index 000000000000..19e8ffa1ac12
--- /dev/null
+++ b/airbyte-integrations/connectors/source-lemlist/source_lemlist/schemas/unsubscribes.json
@@ -0,0 +1,12 @@
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "type": "object",
+  "properties": {
+    "_id": {
+      "type": "string"
+    },
+    "email": {
+      "type": ["null", "string"]
+    }
+  }
+}
diff --git a/airbyte-integrations/connectors/source-lemlist/source_lemlist/source.py b/airbyte-integrations/connectors/source-lemlist/source_lemlist/source.py
new file mode 100644
index 000000000000..52b3e8d9b53b
--- /dev/null
+++ b/airbyte-integrations/connectors/source-lemlist/source_lemlist/source.py
@@ -0,0 +1,41 @@
+#
+# Copyright (c) 2021 Airbyte, Inc., all rights reserved.
+#
+
+
+from typing import Any, List, Mapping, Tuple
+
+from airbyte_cdk.models import SyncMode
+from airbyte_cdk.sources import AbstractSource
+from airbyte_cdk.sources.streams import Stream
+from source_lemlist.auth import HttpBasicAuthenticator
+
+from .streams import Activities, Campaigns, Team, Unsubscribes
+
+
+class SourceLemlist(AbstractSource):
+    def check_connection(self, logger, config) -> Tuple[bool, any]:
+        try:
+            auth = HttpBasicAuthenticator(
+                (
+                    "",
+                    config["api_key"],
+                ),
+            )
+
+            team_stream = Team(authenticator=auth)
+            team_gen = team_stream.read_records(sync_mode=SyncMode.full_refresh)
+
+            next(team_gen)
+            return True, None
+        except Exception as error:
+            return False, f"The provided API key {config['api_key']} is invalid. - {repr(error)}"
+
+    def streams(self, config: Mapping[str, Any]) -> List[Stream]:
+        auth = HttpBasicAuthenticator(
+            (
+                "",
+                config["api_key"],
+            ),
+        )
+        return [Team(authenticator=auth), Campaigns(authenticator=auth), Activities(authenticator=auth), Unsubscribes(authenticator=auth)]
diff --git a/airbyte-integrations/connectors/source-lemlist/source_lemlist/spec.json b/airbyte-integrations/connectors/source-lemlist/source_lemlist/spec.json
new file mode 100644
index 000000000000..c0604784a830
--- /dev/null
+++ b/airbyte-integrations/connectors/source-lemlist/source_lemlist/spec.json
@@ -0,0 +1,17 @@
+{
+  "documentationUrl": "https://docsurl.com",
+  "connectionSpecification": {
+    "$schema": "http://json-schema.org/draft-07/schema#",
+    "title": "Lemlist Spec",
+    "type": "object",
+    "required": ["api_key"],
+    "additionalProperties": false,
+    "properties": {
+      "api_key": {
+        "type": "string",
+        "description": "API key to access your lemlist account.",
+        "airbyte_secret": true
+      }
+    }
+  }
+}
diff --git a/airbyte-integrations/connectors/source-lemlist/source_lemlist/streams.py b/airbyte-integrations/connectors/source-lemlist/source_lemlist/streams.py
new file mode 100644
index 000000000000..cafb32347ef4
--- /dev/null
+++ b/airbyte-integrations/connectors/source-lemlist/source_lemlist/streams.py
@@ -0,0 +1,88 @@
+#
+# Copyright (c) 2021 Airbyte, Inc., all rights reserved.
+#
+
+from typing import Any, Iterable, Mapping, MutableMapping, Optional
+
+import requests
+from airbyte_cdk.sources.streams.http import HttpStream
+
+
+class LemlistStream(HttpStream):
+    """Default and max value page_size can have is 100"""
+
+    url_base = "https://api.lemlist.com/api/"
+    primary_key = "_id"
+    page_size = 100
+    initial_offset = 0
+    offset = initial_offset
+
+    def __init__(self, **kwargs):
+        super().__init__(**kwargs)
+
+    def next_page_token(self, response: requests.Response) -> Optional[Mapping[str, Any]]:
+        """Pagination is offset-based and response doesn't contain a next_page_token
+        Thus, the only way to know if there are any more pages is to check if the
+        number of items in current page is equal to the page_size limit"""
+
+        if len(response.json()) == self.page_size:
+            self.offset += self.page_size
+            next_page_params = {"offset": self.offset}
+            return next_page_params
+        return None
+
+    def path(self, **kwargs) -> str:
+        return None
+
+    def request_params(
+        self, stream_state: Mapping[str, Any], stream_slice: Mapping[str, any] = None, next_page_token: Mapping[str, Any] = None, **kwargs
+    ) -> MutableMapping[str, Any]:
+        params = super().request_params(stream_state=stream_state, next_page_token=next_page_token, **kwargs)
+        params["offset"] = self.initial_offset
+        params["limit"] = self.page_size
+        if next_page_token:
+            params.update(**next_page_token)
+        return params
+
+    def parse_response(self, response: requests.Response, **kwargs) -> Iterable[Mapping]:
+        records = response.json()
+        yield from records
+
+    def backoff_time(self, response: requests.Response):
+        if "Retry-After" in response.headers:
+            return int(response.headers["Retry-After"])
+        else:
+            self.logger.info("Retry-after header not found. Using default backoff value")
+            return 2
+
+
+class Team(LemlistStream):
+    """https://developer.lemlist.com/#get-team-information"""
+
+    def path(self, **kwargs) -> str:
+        return "team"
+
+    def parse_response(self, response: requests.Response, **kwargs) -> Iterable[Mapping]:
+        records = response.json()
+        yield from [records]
+
+
+class Campaigns(LemlistStream):
+    """https://developer.lemlist.com/#campaigns"""
+
+    def path(self, **kwargs) -> str:
+        return "campaigns"
+
+
+class Activities(LemlistStream):
+    """https://developer.lemlist.com/#activities"""
+
+    def path(self, **kwargs) -> str:
+        return "activities"
+
+
+class Unsubscribes(LemlistStream):
+    """https://developer.lemlist.com/#unsubscribes"""
+
+    def path(self, **kwargs) -> str:
+        return "unsubscribes"
diff --git a/airbyte-integrations/connectors/source-lemlist/unit_tests/__init__.py b/airbyte-integrations/connectors/source-lemlist/unit_tests/__init__.py
new file mode 100644
index 000000000000..46b7376756ec
--- /dev/null
+++ b/airbyte-integrations/connectors/source-lemlist/unit_tests/__init__.py
@@ -0,0 +1,3 @@
+#
+# Copyright (c) 2021 Airbyte, Inc., all rights reserved.
+#
diff --git a/airbyte-integrations/connectors/source-lemlist/unit_tests/test_source.py b/airbyte-integrations/connectors/source-lemlist/unit_tests/test_source.py
new file mode 100644
index 000000000000..1309156409ab
--- /dev/null
+++ b/airbyte-integrations/connectors/source-lemlist/unit_tests/test_source.py
@@ -0,0 +1,26 @@
+#
+# Copyright (c) 2021 Airbyte, Inc., all rights reserved.
+#
+
+from unittest.mock import MagicMock, patch
+
+from source_lemlist.source import SourceLemlist
+
+
+@patch("source_lemlist.source.Team.read_records", return_value=iter(["item"]))
+def test_check_connection(_):
+    test_config = {"api_key": "test-api-key"}
+    logger_mock = MagicMock()
+
+    source = SourceLemlist()
+    valid_connection, error = source.check_connection(logger_mock, test_config)
+
+    assert valid_connection
+
+
+def test_streams():
+    source = SourceLemlist()
+    config_mock = MagicMock()
+    streams = source.streams(config_mock)
+    expected_streams_number = 4
+    assert len(streams) == expected_streams_number
diff --git a/airbyte-integrations/connectors/source-lemlist/unit_tests/test_streams.py b/airbyte-integrations/connectors/source-lemlist/unit_tests/test_streams.py
new file mode 100644
index 000000000000..b9631f9414d3
--- /dev/null
+++ b/airbyte-integrations/connectors/source-lemlist/unit_tests/test_streams.py
@@ -0,0 +1,94 @@
+#
+# Copyright (c) 2021 Airbyte, Inc., all rights reserved.
+#
+
+from http import HTTPStatus
+from unittest.mock import MagicMock
+
+import pytest
+import requests
+import responses
+from source_lemlist.streams import LemlistStream
+
+
+def setup_responses():
+    responses.add(
+        responses.GET,
+        "https://api.lemlist.com/api/example_endpoint",
+        json=[
+            {"_id": "cam_aaWL92T22Sei3Bz6v", "name": "Campaign1", "labels": ["label 1", "label 2"]},
+            {"_id": "cam_aaXwBiebA8pWPKqpK", "name": "Campaign2"},
+        ],
+    )
+
+
+@pytest.fixture
+def patch_base_class(mocker):
+    # Mock abstract methods to enable instantiating abstract class
+    mocker.patch.object(LemlistStream, "path", "v0/example_endpoint")
+    mocker.patch.object(LemlistStream, "primary_key", "test_primary_key")
+    mocker.patch.object(LemlistStream, "__abstractmethods__", set())
+
+
+def test_request_params(patch_base_class):
+    stream = LemlistStream()
+    inputs = {
+        "stream_slice": None,
+        "stream_state": None,
+        "next_page_token": {"offset": 100},
+    }
+    expected_params = {"limit": stream.page_size, "offset": 100}
+    assert stream.request_params(**inputs) == expected_params
+
+
+@responses.activate
+def test_next_page_token(patch_base_class):
+    setup_responses()
+    stream = LemlistStream()
+    inputs = {"response": requests.get("https://api.lemlist.com/api/example_endpoint")}
+    expected_token = None
+    assert stream.next_page_token(**inputs) == expected_token
+
+
+@responses.activate
+def test_parse_response(patch_base_class):
+    setup_responses()
+    stream = LemlistStream()
+    inputs = {"response": requests.get("https://api.lemlist.com/api/example_endpoint")}
+    expected_parsed_object = {"_id": "cam_aaWL92T22Sei3Bz6v", "name": "Campaign1", "labels": ["label 1", "label 2"]}
+    assert next(stream.parse_response(**inputs)) == expected_parsed_object
+
+
+def test_request_headers(patch_base_class):
+    stream = LemlistStream()
+    inputs = {"stream_slice": None, "stream_state": None, "next_page_token": {"offset": 100}}
+    assert stream.request_headers(**inputs) == {}
+
+
+def test_http_method(patch_base_class):
+    stream = LemlistStream()
+    expected_method = "GET"
+    assert stream.http_method == expected_method
+
+
+@pytest.mark.parametrize(
+    ("http_status", "should_retry"),
+    [
+        (HTTPStatus.OK, False),
+        (HTTPStatus.BAD_REQUEST, False),
+        (HTTPStatus.TOO_MANY_REQUESTS, True),
+        (HTTPStatus.INTERNAL_SERVER_ERROR, True),
+    ],
+)
+def test_should_retry(patch_base_class, http_status, should_retry):
+    response_mock = MagicMock()
+    response_mock.status_code = http_status
+    stream = LemlistStream()
+    assert stream.should_retry(response_mock) == should_retry
+
+
+def test_backoff_time(patch_base_class):
+    response_mock = MagicMock()
+    stream = LemlistStream()
+    expected_backoff_time = 2
+    assert stream.backoff_time(response_mock) == expected_backoff_time
diff --git a/docs/SUMMARY.md b/docs/SUMMARY.md
index 0c9eb152fb68..78126040ade5 100644
--- a/docs/SUMMARY.md
+++ b/docs/SUMMARY.md
@@ -75,6 +75,7 @@
     * [Kafka](integrations/sources/kafka.md)
     * [Klaviyo](integrations/sources/klaviyo.md)
     * [Kustomer](integrations/sources/kustomer.md)
+    * [Lemlist](integrations/sources/lemlist.md)
     * [LinkedIn Ads](integrations/sources/linkedin-ads.md)
     * [Lever Hiring](integrations/sources/lever-hiring.md)
     * [Looker](integrations/sources/looker.md)
diff --git a/docs/integrations/README.md b/docs/integrations/README.md
index ce62c2badd75..797b10b5564c 100644
--- a/docs/integrations/README.md
+++ b/docs/integrations/README.md
@@ -57,6 +57,7 @@ Airbyte uses a grading system for connectors to help users understand what to ex
 | [Jira](sources/jira.md) | Certified |
 | [Klaviyo](sources/klaviyo.md) | Beta |
 | [Klaviyo](sources/kustomer.md) | Alpha |
+| [Lemlist](sources/lemlist.md) | Alpha |
 | [LinkedIn Ads](sources/linkedin-ads.md) | Beta |
 | [Kustomer](sources/kustomer.md) | Alpha |
 | [Lever Hiring](sources/lever-hiring.md) | Beta |
diff --git a/docs/integrations/sources/lemlist.md b/docs/integrations/sources/lemlist.md
new file mode 100644
index 000000000000..1e2c57c3c44b
--- /dev/null
+++ b/docs/integrations/sources/lemlist.md
@@ -0,0 +1,40 @@
+# Lemlist
+
+## Sync overview
+
+The Lemlist source supports Full Refresh syncs only.
+
+This source can sync data for the [Lemlist API](https://developer.lemlist.com/#introduction).
+
+### Output schema
+
+This Source is capable of syncing the following core Streams:
+
+* [Team](https://api.lemlist.com/api/team)
+* [Campaigns](https://api.lemlist.com/api/campaigns)
+* [Activities](chttps://api.lemlist.com/api/activities)
+* [Unsubscribes](https://api.lemlist.com/api/unsubscribes)
+
+### Features
+
+| Feature | Supported?\(Yes/No\) | Notes |
+| :--- | :--- | :--- |
+| Full Refresh Sync | Yes |  |
+| Incremental - Append Sync | No |  |
+| Namespaces | No |  |
+
+### Performance considerations
+
+The Lemlist connector should not run into Lemlist API limitations under normal usage. Please [create an issue](https://github.com/airbytehq/airbyte/issues) if you see any rate limit issues that are not automatically retried successfully.
+
+## Getting started
+
+### Requirements
+
+* Lemlist API key
+
+## Changelog
+
+| Version | Date | Pull Request | Subject |
+| :--- | :--- | :--- | :--- |
+| 0.1.0 | 2021-10-14 | [7062](https://github.com/airbytehq/airbyte/pull/7062) | Initial Release |