
Both tools offer comparable feature coverage, with Amazon Cognito supporting 27 features and Firebase Authentication supporting 22. Consider your specific needs regarding authentication, enterprise auth, security, user management and extensibility when making your decision. Amazon Cognito fully covers machine to machine (m2m) authentication, and both tools fully cover branding.
Email templates and FirebaseUI can be localized; set the language with a `languageCode` property or override CSS for more than 40 languages
| Amazon Cognito | Firebase Authentication | |
|---|---|---|
Email templates and FirebaseUI can be localized; set the language with a `languageCode` property or override CSS for more than 40 languages |
Amazon Cognito offers significantly broader coverage than Firebase Authentication, supporting 12 certifications and regulatory frameworks compared to 6 for Firebase Authentication.

| Compliance | Amazon Cognito | Firebase Authentication |
|---|---|---|