Open-source alternatives guide · Updated 2026
Compare the best free and open-source alternatives to Clerk — 9 verified projects with explicit catalog relationships. Inspect licenses, GitHub activity, self-hosting signals, and migration fit before you switch.
Only explicit alternative relationships are shown—never inferred competitor claims.
This guide compares 9 verified open-source alternatives to Clerk, including Better Auth, Authentik, SuperTokens, and Logto.
Projects appear across Security & Privacy, AI & Machine Learning, and Business Software. 3 options include a self-hosting signal — see the self-hosted catalog. 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: Better Auth · Jump to ranking · 29.2K stars
Proprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, repository activity, and self-hosting options befo
Compare capabilities, licensing, and ownership model. Stars help with discovery; they are not a security or product-fit guarantee.
Open-source alternative to Clerk
The most comprehensive authentication framework
The most comprehensive authentication framework Review the official repository, license, release activity, and deployment documentation before production adoption.
The authentication glue you need.
The authentication glue you need. Review the official repository, license, release activity, and deployment documentation before production adoption.
Open-source alternative to Clerk
Open source alternative to Auth0 / Firebase Auth / AWS Cognito
Open source alternative to Auth0 / Firebase Auth / AWS Cognito Review the official repository, license, release activity, and deployment documentation before production adoption.
Open-source alternative to Clerk
🧑🚀 Authentication and authorization infrastructure for SaaS and AI apps, built on OIDC and OAuth 2.1 with multi-tenancy, SSO, and RBAC.
🧑🚀 Authentication and authorization infrastructure for SaaS and AI apps, built on OIDC and OAuth 2.1 with multi-tenancy, SSO, and RBAC. Review the official repository, license,
Open-source alternative to Clerk
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Headless cloud-native authentication and identity management written in Go. Scales to a billion+ users. Replace Homegrown, Auth0, Okta, Firebase with better UX and DX. Passkeys, Social Sign In, OIDC, Magic Link, Multi-Fa
Headless cloud-native authentication and identity management written in Go. Scales to a billion+ users. Replace Homegrown, Auth0, Okta, Firebase with better UX and DX. Passkeys, So
Modern authentication, on your terms. Open source alternative to Auth0, Clerk, WorkOS, Stytch.
Modern authentication, on your terms. Open source alternative to Auth0, Clerk, WorkOS, Stytch. Review the official repository, license, release activity, and deployment documentati
Open-source alternative to Clerk
The user infrastructure platform. You choose the frontend, backend, and database. Hexclave handles everything else.
The user infrastructure platform. You choose the frontend, backend, and database. Hexclave handles everything else. Review the official repository, license, release activity, and d
Open-source alternative to Clerk
Open source Auth0/Clerk/Firebase alternative. Passkeys, SSO, MFA, passwordless, biometric login. Self-hosted or cloud. Enterprise-ready for SaaS & mobile apps
Open source Auth0/Clerk/Firebase alternative. Passkeys, SSO, MFA, passwordless, biometric login. Self-hosted or cloud. Enterprise-ready for SaaS & mobile apps Review the official r
Open-source alternative to Clerk
Open source auth infrastructure for B2B SaaS
Open source auth infrastructure for B2B SaaS Review the official repository, license, release activity, and deployment documentation before production adoption.
Map must-have capabilitiesList the workflows in Clerk 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.
OpenSourceChoice currently lists 9 projects with an explicit alternative relationship to Clerk. Catalog highlights include Better Auth, Authentik, and SuperTokens. Rankings follow public GitHub stars and recorded momentum—not paid placement. Match capabilities and license fit to your workflow before adopting any option.
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.
3 options in this list carry a self-hosting signal. Confirm the official install guide, backups, upgrades, and hardening steps before production.
Map must-have Clerk 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.
Narrow the same alternatives by search, license, tags, or self-hosting signals when you need a tighter shortlist.
The most comprehensive authentication framework
Security & PrivacyOpen-source projects grouped in this category for discovery and comparison.#
TypeScriptProjects tagged with this topic in the verified catalog.
Github ActionsProjects tagged with this topic in the verified catalog.
JavaScriptProjects tagged with this topic in the verified catalog.
ClerkProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…The authentication glue you need.
Security & PrivacyOpen-source projects grouped in this category for discovery and comparison.#
PythonProjects tagged with this topic in the verified catalog.Github ActionsProjects tagged with this topic in the verified catalog.JavaScriptProjects tagged with this topic in the verified catalog.ClerkProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…Open source alternative to Auth0 / Firebase Auth / AWS Cognito
Security & PrivacyOpen-source projects grouped in this category for discovery and comparison.#
JavaProjects tagged with this topic in the verified catalog.Github ActionsProjects tagged with this topic in the verified catalog.JavaScriptProjects tagged with this topic in the verified catalog.ClerkProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…🧑🚀 Authentication and authorization infrastructure for SaaS and AI apps, built on OIDC and OAuth 2.1 with multi-tenancy, SSO, and RBAC.
AI & Machine LearningOpen-source projects grouped in this category for discovery and comparison.#TypeScriptProjects tagged with this topic in the verified catalog.Github ActionsProjects tagged with this topic in the verified catalog.JavaScriptProjects tagged with this topic in the verified catalog.AI-nativeThis project includes AI-native capability signals in the catalog metadata.ClerkProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…Headless cloud-native authentication and identity management written in Go. Scales to a billion+ users. Replace Homegrown, Auth0, Okta, Firebase with better UX and DX. Passkeys, Social Sign In, OIDC, Magic Link, Multi-Fa
Security & PrivacyOpen-source projects grouped in this category for discovery and comparison.#
GoProjects tagged with this topic in the verified catalog.Github ActionsProjects tagged with this topic in the verified catalog.JavaScriptProjects tagged with this topic in the verified catalog.
Self-hostedThis project carries a self-hosting or local-deployment signal. Verify the official install guide before production use.ClerkProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…Modern authentication, on your terms. Open source alternative to Auth0, Clerk, WorkOS, Stytch.
Security & PrivacyOpen-source projects grouped in this category for discovery and comparison.#GoProjects tagged with this topic in the verified catalog.Github ActionsProjects tagged with this topic in the verified catalog.JavaScriptProjects tagged with this topic in the verified catalog.ClerkProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…The user infrastructure platform. You choose the frontend, backend, and database. Hexclave handles everything else.
Business SoftwareOpen-source projects grouped in this category for discovery and comparison.#TypeScriptProjects tagged with this topic in the verified catalog.Github ActionsProjects tagged with this topic in the verified catalog.JavaScriptProjects tagged with this topic in the verified catalog.Self-hostedThis project carries a self-hosting or local-deployment signal. Verify the official install guide before production use.ClerkProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…Open source Auth0/Clerk/Firebase alternative. Passkeys, SSO, MFA, passwordless, biometric login. Self-hosted or cloud. Enterprise-ready for SaaS & mobile apps
Security & PrivacyOpen-source projects grouped in this category for discovery and comparison.#GoProjects tagged with this topic in the verified catalog.Github ActionsProjects tagged with this topic in the verified catalog.JavaScriptProjects tagged with this topic in the verified catalog.Self-hostedThis project carries a self-hosting or local-deployment signal. Verify the official install guide before production use.ClerkProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…Open source auth infrastructure for B2B SaaS
InfrastructureOpen-source projects grouped in this category for discovery and comparison.#TypeScriptProjects tagged with this topic in the verified catalog.Github ActionsProjects tagged with this topic in the verified catalog.JavaScriptProjects tagged with this topic in the verified catalog.ClerkProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…
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