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Head-to-head · OAuth Server Software

Apereo CAS vs Amazon Cognito

  • Updated Oct 2026
  • Both researched from official sources
  • 6 checks side by side
Higher score Apereo CAS #4 in OAuth Server Software 9.0/10 Free plan Free plan✓ 5 of 5 features Visit Apereo CAS
Amazon Cognito #7 in OAuth Server Software 8.7/10 Free plan Free plan✓ 0 of 5 features Visit Amazon Cognito

Apereo CAS leads on 0 checks, Amazon Cognito on 0, and 6 are even. Who comes out ahead on the 6 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreApereo CAS · 9.0/10
  • Free planboth
  • Most featuresApereo CAS · 5 of 5

Apereo CAS scores higher on our rubric for oauth server software: 9.0 against 8.7 out of 10; our editors rank them #4 and #7.

Apereo CAS is the better fit for auditable open-source SSO infrastructure. Amazon Cognito is the better fit for AWS-centric application authentication.

  • Apereo CAS fits best

    Auditable open-source SSO infrastructure

  • Amazon Cognito fits best

    AWS-centric application authentication

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Side by side

Feature Apereo CAS 9.0/10 Visit ↗ Amazon Cognito 8.7/10 Visit ↗
At a glance
Editor score 9.0 8.7
Ranking #4 in OAuth Server Software #7 in OAuth Server Software
Best for Auditable open-source SSO infrastructure AWS-centric application authentication
Pricing model Free Free plan + paid
Starting price Free plan $0.0055/user/mo
Free plan ✓ ✓
Free trial — —
Deployment Self-hosted Cloud, Mobile
Platforms Web, Linux Web, iOS, Android
Integrations 13 integrations 13 integrations
Features Apereo CAS 5/5 · Amazon Cognito 0/5
OpenID Connect ✓ (best) Not checked yet
SAML support ✓ (best) Not checked yet
Self-hosting ✓ (best) Not checked yet
Token introspection ✓ (best) Not checked yet
Machine-to-machine auth ✓ (best) Not checked yet
Specs
Deployment model Self_hosted Not checked yet
Our review
Pros
  • Supports CAS, SAML, OAuth 2.0, OpenID Connect, REST, and WS-Federation
  • Connects authentication to LDAP, databases, X.509, RADIUS, MongoDB, and more
  • Includes token introspection, machine-to-machine auth, auditing, and monitoring
  • OAuth 2.0, OIDC, SAML federation, and social sign-in
  • Passwordless access, MFA, and adaptive authentication options
  • Deep integrations with AWS services and Lambda triggers
Cons
  • Self-hosted deployment requires internal infrastructure ownership
  • Its broad configuration surface may require specialist identity expertise
  • Best suited to organizations able to manage a Java-based identity server
  • Not designed as a standalone workforce directory
  • No verified directory synchronization or lifecycle provisioning
  • Plus has no free tier, and pricing scales by monthly active users
Our verdict

Apereo CAS is an open-source Java server for authentication, authorization, identity management, and single sign-on. It is designed for organizations that need a self-managed identity provider, including enterprise and higher-education…

Read the review →

Amazon Cognito provides managed user directories, authentication, authorization, identity federation, and temporary AWS credentials for web and mobile applications. It is aimed at developers building customer-facing applications across…

Read the review →
  1. Apereo CASOAuth Server Software 9.0Free plan
  2. Amazon CognitoOAuth Server Software 8.7Free plan

Strengths and trade-offs

  • Apereo CAS — where it wins

    • Supports CAS, SAML, OAuth 2.0, OpenID Connect, REST, and WS-Federation
    • Connects authentication to LDAP, databases, X.509, RADIUS, MongoDB, and more
    • Includes token introspection, machine-to-machine auth, auditing, and monitoring

    Where it doesn't

    • Self-hosted deployment requires internal infrastructure ownership
    • Its broad configuration surface may require specialist identity expertise
    • Best suited to organizations able to manage a Java-based identity server

  • Amazon Cognito — where it wins

    • OAuth 2.0, OIDC, SAML federation, and social sign-in
    • Passwordless access, MFA, and adaptive authentication options
    • Deep integrations with AWS services and Lambda triggers

    Where it doesn't

    • Not designed as a standalone workforce directory
    • No verified directory synchronization or lifecycle provisioning
    • Plus has no free tier, and pricing scales by monthly active users

More comparisons

All OAuth server software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update