Better Auth

Hexclave is the open-source platform for everything user.

Ory is a certified and battle-tested identity solution backed by a large open source community and trusted by Fortune 500 companies.

ZITADEL gives developers all they need to integrate identity management.

Open Source User Authentication. Build fast, maintain control, with reasonable pricing.

Keycloak - the open source identity and access management solution.

Open source, privacy-first, and built to scale.