Open-source alternatives guide · Updated 2026

Best open-source alternatives to Workos

Q: How should I evaluate Workos alternatives?

Map must-have Workos workflows, verify license and compliance fit, run a proof of concept with real data and integrations, then plan ownership for upgrades, backups, support, and an exit path.

Compare the best free and open-source alternatives to WorkOS — 3 verified projects with explicit catalog relationships. Inspect licenses, GitHub activity, self-hosting signals, and migration fit before you switch.

3verified alternatives
0self-hosted signals
2categories

Only explicit alternative relationships are shown—never inferred competitor claims.

Overview

This guide compares 3 verified open-source alternatives to WorkOS, including Keycloak, Permify, and Cerbos.

Projects appear across Infrastructure and Security & Privacy. Ranking follows public GitHub stars and recorded momentum—not vendor marketing. Compare projects side by side, then confirm license fit, migration effort, and operational ownership before adopting any option.

Strongest repository-activity signal: Keycloak · Jump to ranking · 35.7K stars

About WorkOS

Proprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, repository activity, and self-hosting options befo

Ranked open-source alternatives to WorkOS

Compare capabilities, licensing, and ownership model. Stars help with discovery; they are not a security or product-fit guarantee.

Keycloak

Open-source alternative to WorkOS

United StatesInfrastructureApache-2.0

Open Source Identity and Access Management For Modern Applications and Services

Open Source Identity and Access Management For Modern Applications and Services Review the official repository, license, release activity, and deployment documentation before produ

Best for: Infrastructure teams
Deployment: Inspectable source
License: Apache-2.0
Activity: Updated 26 hours ago

Key capabilities

Permify

Open-source alternative to WorkOS

Security & PrivacyAGPL-3.0

An open-source authorization as a service inspired by Google Zanzibar, designed to build and manage fine-grained and scalable authorization systems for any application. — Permify is now part of FusionAuth 🎉

An open-source authorization as a service inspired by Google Zanzibar, designed to build and manage fine-grained and scalable authorization systems for any application. — Permify i

Best for: Security teams
Deployment: Inspectable source
License: AGPL-3.0
Activity: Updated 33 hours ago

Key capabilities

golang

security

kubernetes cloud-native

Cerbos

Open-source alternative to WorkOS

Security & PrivacyApache-2.0

Cerbos is the open core, language-agnostic, scalable authorization solution that makes user permissions and authorization simple to implement and manage by writing context-aware access control policies for your applicati

Cerbos is the open core, language-agnostic, scalable authorization solution that makes user permissions and authorization simple to implement and manage by writing context-aware ac

Best for: Security teams
Deployment: Inspectable source
License: Apache-2.0
Activity: Updated 31 hours ago

Key capabilities

golang

security

kubernetes

How to choose a WorkOS alternative

Map must-have capabilitiesList the workflows in WorkOS you cannot drop during migration.

Verify the licenseConfirm it fits your use, distribution, and compliance model. Browse license briefs.

Run a proof of conceptTest real data, integrations, clients, and failure modes. Use Compare for side-by-side checks.

Plan ownershipAssess upgrades, backups, support, and an exit path. Read when self-hosting is worth it.

Frequently asked questions about WorkOS alternatives

What are the best open-source alternatives to WorkOS?

OpenSourceChoice currently lists 3 projects with an explicit alternative relationship to WorkOS. Catalog highlights include Keycloak, Permify, and Cerbos. Rankings follow public GitHub stars and recorded momentum—not paid placement. Match capabilities and license fit to your workflow before adopting any option.

Are open-source alternatives to WorkOS free?

Most catalogued alternatives publish source under OSI or source-available licenses and are free to inspect. Hosting, commercial support, or cloud model APIs may still cost money. Always read the project license for your use case.

Can I self-host an alternative to WorkOS?

Some open-source replacements support self-hosting or local deployment; others are libraries or clients without a server component. Check each project’s deployment docs rather than assuming a drop-in hosted twin.

How should I evaluate WorkOS alternatives?

Map must-have WorkOS workflows, verify license and compliance fit, run a proof of concept with real data and integrations, then plan ownership for upgrades, backups, support, and an exit path.