Open Source Alternatives
Alternatives to AWS Cognito
User authentication and authorization service from Amazon.
AWS Cognito is a trademark of its respective owner.
Updated May 2026
What you gain
- ✓No AWS lock-in tying authentication to your cloud provider
- ✓Full control over user data without Cognito's attribute limits
- ✓No 50,000 MAU free tier cliff that jumps to $0.0055/MAU
- ✓Self-hosted auth that works with any cloud or on-prem setup
What you give up
- △No native integration with API Gateway, ALB, and IAM roles
- △No managed Hosted UI with customizable login pages
- △No built-in Advanced Security (adaptive auth, compromised credential checks)
- △No direct integration with AWS Amplify for mobile/web auth
Switching Cost
Cognito's lock-in is the AWS integration, not the user data. User pools export cleanly, but the IAM role mappings, API Gateway authorizers, and Amplify auth configurations are deeply tied to AWS. Teams using Cognito as a standalone auth provider can switch in a few days. Teams with Cognito triggers (Lambda pre/post auth hooks), identity pools for AWS resource access, and Amplify frontend integration should budget 2-3 weeks. The hidden cost is rebuilding the IAM trust relationships that let authenticated users access S3, DynamoDB, and other AWS services directly.
| ZITADEL | SuperTokens | Logto | |
|---|---|---|---|
| Overlap | 75% | 72% | 72% |
| Migration | moderate | moderate | moderate |
| License | GNU Affero General Public License v3.0 | Apache License 2.0 | Mozilla Public License 2.0 |
| Best for | Small teams | Small teams | Small teams |
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Drop-in Replacements
Ranked by feature coverage
ZITADEL
7375% coverageIdentity infrastructure, simplified
ZITADEL is a self-contained identity platform: login, signup, SSO, multi-factor auth, user roles, all in one. It's an alternative to Auth0 or Clerk that you can self-host for free.
SuperTokens
8172% coverageOpen source alternative to Auth0/Firebase Auth/Cognito
SuperTokens is the open source authentication platform: signup, password reset, social login, multi-factor auth, without Auth0 prices or Firebase lock-in. It handles session management, email verification, passwordless login, and social OAuth out of the box.
Logto
7672% coverageAuth infrastructure for SaaS and AI apps
Logto is an auth platform you can self-host for free or use their cloud: login, signup, SSO, MFA, and user management for SaaS apps. Drop in their SDK, get a polished login experience, manage users through their admin console, done.
Authentik
8170% coverageFlexible identity provider
SSO (single sign-on), multi-factor auth, user directories, all in one place. The open source version is extremely capable.
authorizer
6765% coverageYour data, your control. Fully open source, authentication and authorization. No lock-ins. Deployment in Railway in 120 seconds || Spin a docker image as a micro-service in your infra. Built in login page and Admin panel out of the box.
Authorizer is a self-hosted auth server that replaces Auth0, Firebase Auth, or Supabase Auth. Bring your own database (Postgres, MySQL, SQLite, MongoDB, and 7 more), deploy it, and own every byte of user data.
Building Blocks
AWS Cognito is a platform. It bundles multiple capabilities into one subscription. These tools each cover one piece. Teams often assemble 2–3 of them instead of paying for the full suite.