Osso – Open-source SAML SSO service
A Ruby OAuth microservice for SAML based authentication - enterprise-oss/osso
Osso – Open-source SAML SSO service launched on February 2, 2021 with 41 votes, #1,094 of 3,133 launches that month and more than 75% of that year's launches. The site was still online in September 2026, 5 years on.
In plain words
Osso is an open-source SAML single sign-on service for developers building applications that need enterprise authentication. It handles SAML protocol implementation, allowing companies to integrate their identity providers with applications without building SSO from scratch. The service is available as source code on GitHub, making it suitable for teams wanting to self-host or customize their authentication infrastructure.
written from the facts on this page · September 2026
Does a similar job
all alternatives →
Admin Portal (by WorkOS)2020 · workos.com · ▲1,408Pre-built wizard for configuring Single Sign-On (SSO/SAML)
Open-source enterprise SSO – integrate SAML with a few lines of code2022 · github.com · ▲24Streamline your web application's authentication with Polis, an SSO service supporting SAML and OpenID Connect protocols. Beyond enterprise-grade Single Sign-On, it also supports Directory Sync via the SCIM 2.0 protocol for automatic user and group provisioning/de-provisioning. - ory/polis
Open source SAML SSO (by BoxyHQ)2022 · ory.com · ▲151Integrate enterprise SSO with just a few lines of code

- OOoso – Open-Source Policy Engine for Authorization2020 · osohq.com · ▲44
Oso helps companies run agents in production with confidence using monitoring, access controls, and automated least privilege.
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