Apereo CAS
6.7#19 in oauth server softwareFree planFree planWebAPILinuxSelf-hosted
VisitApereo CAS vs FusionAuth
FusionAuth
8.3#1 in authentication softwareFrom $162 a monthFree planAndroidiOSWebAPI
VisitWhat both publish
| Fact | Apereo CAS | FusionAuth |
|---|---|---|
| Authentication | Authentication sources include LDAP, databases, X.509, SPNEGO, JAAS, JWT, RADIUS, and MongoDB. | It supports username/password login, identity providers, passkeys, and one-time passwords. |
| Deployment | CAS is a Java web application that requires JDK 25 for building and deployment according to its installation requirements. | The product can run locally, on premises, in a customer cloud, on an air-gapped server or as FusionAuth Cloud. |
| Integrations | CAS has built-in integrations for many SAML2 service providers, with configuration recipes that can automate service registration and attribute-release settings. | Identity-provider integrations include Apple, Facebook, Google, Twitter and arbitrary OIDC or SAML v2 providers, with connectors, plugins and monitoring integrations also available. |
| Operating systems | The installation requirements state there is no particular operating-system preference, though Linux-based installations are more common than Windows. | Supported operating systems include all Linux distributions, macOS 10.15 or newer, Windows Server 2019, and Windows 10. |
Apereo CAS plans
- Apereo CASFree
FusionAuth plans
- CommunityFree
- Starter$162 a month
- Enterprise$2,970 a month
- Essentials$2,970 a month
Pick Apereo CAS if…
You want what its maker publishes above — check its page for the details.
Pick FusionAuth if…
FusionAuth suits teams managing end-user identity that want deployment choices from self-hosting to managed cloud. It is not positioned as a desktop integration or Active Directory replacement.