Authentication Open Source Tools

Alternative toBitwarden

Lightweight self-hosted password manager server, Bitwarden compatible

• 69,337 GitHub stars
• AGPL-3.0Licence AGPL-3.0
• #Security

Alternative toFirebase

Self-hosted backend: auth, databases, storage, and functions

• 57,737 GitHub stars
• BSD-3-ClauseLicence BSD-3-Clause

Alternative toGitHub

Lightweight self-hosted Git server that is painless to set up

• 47,895 GitHub stars
• MITLicence MIT

Alternative toClerk

Drop-in TypeScript auth with MFA, SSO, and multi-tenancy support

• 30,392 GitHub stars
• MITLicence MIT

Alternative to1Password

Cross-platform open source password manager with browser plugin

• 29,338 GitHub stars
• #Security

Alternative to1Password

Open source password manager with end-to-end encryption and self-hosting.

• 20,427 GitHub stars
• AGPL-3.0Licence AGPL-3.0

Alternative toKong Konnect

Cloud-native API gateway with dynamic routing and plugins

• 17,243 GitHub stars
• Apache-2.0Licence Apache-2.0

Alternative toXano

Generate production-ready backends for platform engineers

• 16,015 GitHub stars
• Apache-2.0Licence Apache-2.0

Alternative toAuth0

Open source identity platform with SSO, RBAC, and multi-tenancy

• 15,354 GitHub stars
• AGPL-3.0Licence AGPL-3.0

Alternative toAuth0

Multi-tenant auth platform with SSO, RBAC, and social login

• 14,731 GitHub stars
• MPL-2.0Licence MPL-2.0