diff --git a/.chloggen/awss3-checkapi.yaml b/.chloggen/awss3-checkapi.yaml
new file mode 100644
index 000000000000..9494b6c2d417
--- /dev/null
+++ b/.chloggen/awss3-checkapi.yaml
@@ -0,0 +1,27 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: breaking
+
+# The name of the component, or a single word describing the area of concern, (e.g. filelogreceiver)
+component: awss3exporter
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Do not export the function `NewMarshaler`
+
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+issues: [26304]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext:
+
+# If your change doesn't affect end users or the exported elements of any package,
+# you should instead start your pull request title with [chore] or use the "Skip Changelog" label.
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: [api]
diff --git a/cmd/checkapi/allowlist.txt b/cmd/checkapi/allowlist.txt
index 53c927380f3e..b7be8a3843b1 100644
--- a/cmd/checkapi/allowlist.txt
+++ b/cmd/checkapi/allowlist.txt
@@ -2,7 +2,6 @@ connector/servicegraphconnector
 exporter/alibabacloudlogserviceexporter
 exporter/awscloudwatchlogsexporter
 exporter/awskinesisexporter
-exporter/awss3exporter
 exporter/azuremonitorexporter
 exporter/coralogixexporter
 exporter/datasetexporter
diff --git a/exporter/awss3exporter/exporter.go b/exporter/awss3exporter/exporter.go
index 36ff0c8245b8..6f86d185e19a 100644
--- a/exporter/awss3exporter/exporter.go
+++ b/exporter/awss3exporter/exporter.go
@@ -31,7 +31,7 @@ func newS3Exporter(config *Config,
 
 	logger := params.Logger
 
-	m, err := NewMarshaler(config.MarshalerName, logger)
+	m, err := newMarshaler(config.MarshalerName, logger)
 	if err != nil {
 		return nil, errors.New("unknown marshaler")
 	}
diff --git a/exporter/awss3exporter/exporter_test.go b/exporter/awss3exporter/exporter_test.go
index 01c8cc74ca07..8c06efb5acf4 100644
--- a/exporter/awss3exporter/exporter_test.go
+++ b/exporter/awss3exporter/exporter_test.go
@@ -31,7 +31,7 @@ func getTestLogs(tb testing.TB) plog.Logs {
 }
 
 func getLogExporter(t *testing.T) *s3Exporter {
-	marshaler, _ := NewMarshaler("otlp_json", zap.NewNop())
+	marshaler, _ := newMarshaler("otlp_json", zap.NewNop())
 	exporter := &s3Exporter{
 		config:     createDefaultConfig().(*Config),
 		dataWriter: &TestWriter{t},
diff --git a/exporter/awss3exporter/marshaler.go b/exporter/awss3exporter/marshaler.go
index 686ca49d6dfe..30d18bfd3b86 100644
--- a/exporter/awss3exporter/marshaler.go
+++ b/exporter/awss3exporter/marshaler.go
@@ -23,7 +23,7 @@ var (
 	ErrUnknownMarshaler = errors.New("unknown marshaler")
 )
 
-func NewMarshaler(mType MarshalerType, logger *zap.Logger) (marshaler, error) {
+func newMarshaler(mType MarshalerType, logger *zap.Logger) (marshaler, error) {
 	marshaler := &s3Marshaler{logger: logger}
 	switch mType {
 	case OtlpJSON:
diff --git a/exporter/awss3exporter/marshaler_test.go b/exporter/awss3exporter/marshaler_test.go
index 791a31bc8903..d0ede1990099 100644
--- a/exporter/awss3exporter/marshaler_test.go
+++ b/exporter/awss3exporter/marshaler_test.go
@@ -13,19 +13,19 @@ import (
 
 func TestMarshaler(t *testing.T) {
 	{
-		m, err := NewMarshaler("otlp_json", zap.NewNop())
+		m, err := newMarshaler("otlp_json", zap.NewNop())
 		assert.NoError(t, err)
 		require.NotNil(t, m)
 		assert.Equal(t, m.format(), "json")
 	}
 	{
-		m, err := NewMarshaler("sumo_ic", zap.NewNop())
+		m, err := newMarshaler("sumo_ic", zap.NewNop())
 		assert.NoError(t, err)
 		require.NotNil(t, m)
 		assert.Equal(t, m.format(), "json.gz")
 	}
 	{
-		m, err := NewMarshaler("unknown", zap.NewNop())
+		m, err := newMarshaler("unknown", zap.NewNop())
 		assert.Error(t, err)
 		require.Nil(t, m)
 	}