Keycloak significantly outpaces Authgear in community adoption with 35,912 stars compared to 1,928 stars on GitHub. This 18.6x difference suggests Keycloak has a much larger and more active community. In terms of developer contributions, Keycloak has 8,706 forks, indicating strong developer engagement.

Both projects show recent activity, with Authgear last updated 12 hours ago and Keycloak 7 hours ago.

Both tools share common technology foundations, being built with JavaScript, CSS, Bash, Typescript, JSX, Python. However, they differ in their additional technology choices: Authgear uses Golang while Keycloak leverages C, Java.

Keycloak has been in development longer, starting 13 years ago, compared to Authgear which began 6 years ago. This 7.1-year head start suggests Keycloak may have more mature features and established processes.

Both projects use the Apache-2.0 license, providing identical terms for usage and distribution.

Both tools serve similar use cases in Authentication & SSO. However, they also have distinct specializations: Authgear also focuses on Identity & Access Management (IAM) while Keycloak extends into Authorization & Permissions.

Authgear provides self-hosting options for complete data control and customization, while Keycloak may be primarily cloud-based or require different deployment approaches.