Best Authentication Open Source Tools in 2026

Open Source Alternatives

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Open Source Alternatives

Adapt

stars 13forks 3

Lightweight self-hosted messaging platform for teams

Chat Self Hosted Security+3

Psono

stars 106forks 20

Self-hosted password manager for teams with enterprise SSO

Security Self Hosted Authentication+4

Oso Cloud

stars 3.5Kforks 193

Open source authorization with RBAC, ABAC, and ReBAC for any app

Authorization Security Developer Tools+4

Keestash

stars 10forks 2

Self-hosted team password manager with web-based access control

Security Authentication Authorization+4

Passwordcockpit

stars 136forks 30

Self-hosted team password manager with role-based access

Security Self Hosted Authentication+5

Apache APISIX

stars 17.1Kforks 2.9K

Cloud-native API gateway with dynamic routing and plugins

API Infrastructure Cloud Native Authentication+5

Password Safe

stars 869forks 169

Store passwords in an encrypted local database, no cloud account

Security Cybersecurity Authentication+3

Converse.js

stars 3.3Kforks 834

Self-hosted web-based XMPP chat client for any server

Chat Self Hosted Security+5

Element

stars 13.4Kforks 2.7K

Secure team chat built on the Matrix open protocol

Chat Security Self Hosted+5

Tox

stars 2.7Kforks 312

Free encrypted P2P messaging and voice calls, no servers

Chat Security Privacy Tools+5

Tinode

stars 13.5Kforks 2.1K

Self-hosted instant messaging platform for web and mobile apps

Chat Self Hosted API Development Tools+5

Mumble

stars 8.2Kforks 1.4K

Free open source low-latency voice chat for gaming teams

Chat Self Hosted Security+4