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OpenAlternative

Open Source AWS Cognito Alternatives

A curated collection of the 4 best open source alternatives to AWS Cognito.

The best open source alternative to AWS Cognito is Keycloak. If that does not suit you, we have compiled a ranked list of other open source AWS Cognito alternatives to help you find a suitable replacement.

AWS Cognito alternatives are mainly Authentication & SSO. Browse these if you want a narrower list of alternatives or are looking for a specific functionality of AWS Cognito.

Written by OpenAlternative Last updated: June 2, 2026
#1

Keycloak

Comprehensive open source identity management solution offering single sign-on, social login, and fine-grained authorization for applications and serv

Comprehensive open source identity management solution offering single sig...

#2

Logto

An open-source identity solution offering customizable login experiences, multi-tenant support, and comprehensive user management.

An open-source identity solution offering customizable login experiences, ...

#3

Permify

Open-source authorization service for implementing fine-grained access controls. Centralized, scalable solution supporting RBAC, ABAC and ReBAC with G

Open-source authorization service for implementing fine-grained access con...

#4

Cerbos

A scalable authorization layer that provides fine-grained access control through externalized policies, enabling secure and flexible permissions manag

A scalable authorization layer that provides fine-grained access control t...