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OpenSourceAlternatives

Tag

sso

18 catalogue entries use this topic; each Project's license policy is labeled separately.

Discourse

Discourse

Open-source community platform for discussion, chat, and support

Stars47.9K
Commitjust now
LicenseGPL-2.0

Discourse is a self-hosted community platform that combines threaded discussion with built-in chat, search, and moderation tools.

Alternative toSlackDiscord
Rocket.Chat

Rocket.ChatOpen

Self-hosted secure team chat for mission-critical organizations

Stars46.2K
Commitjust now
LicenseMIT

Rocket.Chat is a self-hosted team chat platform with a Slack data importer, end-to-end encryption, and cloud, on-premises, or air-gapped deployment.

Alternative toSlack
Better Auth

Better AuthOpen

TypeScript auth library that runs inside your app

Stars30.2K
Commitjust now
LicenseMIT

Better Auth is a TypeScript authentication library that runs inside your own application instead of as an external service. User rows live in your own database behind Drizzle, Prisma, or Kysely adapters, so there is no monthly-active-user meter and no third-party service in the request path.

Alternative toAuth0
NetBird

NetBird

Open-source zero-trust access over peer-to-peer WireGuard tunnels

Stars29.8K
Commitjust now
LicenseBSD-3-Clause AND AGPL-3.0-only

NetBird is an open-source zero-trust access platform that links devices, users, and servers in a peer-to-peer WireGuard mesh.

Zulip

ZulipOpen

Open-source team chat with topic threads for focused teamwork

Stars26K
Commitjust now
LicenseApache-2.0

Zulip is an open-source team chat platform that organizes conversations into streams and topics so distributed teams can follow many discussions without losing track.

Alternative toSlack
Authentik

AuthentikOpen

Self-hosted open-source identity provider for modern SSO

Stars25.8K
Commitjust now
LicenseMIT

Authentik is a self-hosted, open-source identity provider that adds single sign-on to web apps and services over SAML, OAuth2/OIDC, LDAP, and RADIUS.

Alternative toOktaAuth0
Pangolin

Pangolin

Self-hosted zero-trust access to apps and infrastructure

Stars23.1K
Commitjust now
LicenseAGPL-3.0-only

Pangolin is a self-hosted zero-trust platform built on WireGuard that gives teams identity-aware access to apps, infrastructure, and AI workloads.

Alternative toFirezone
Logto

LogtoOpen

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

Stars14.7K
Commitjust now
LicenseMPL-2.0

Logto is an open-source identity platform for sign-in, single sign-on, and organization management, available self-hosted or as Logto Cloud.

Ory

OryOpen

Open-source identity platform for login, SSO, and permissions

Stars13.9K
Commit1mo ago
LicenseApache-2.0

Ory is an open-source identity platform built around the Kratos server, offering passkeys, social sign-in, and single sign-on self-hosted or as the managed Ory Network.

Firezone

FirezoneOpen

WireGuard-based zero-trust remote access with self-hosted gateways

Stars9,109
Commitjust now
LicenseApache-2.0

Firezone is a WireGuard-based zero-trust access platform that pairs a managed portal with gateways on your own infrastructure.

Alternative toHeadscaleNetBird
Hexclave

Hexclave

Open-source user infrastructure for auth, payments, emails, and analytics

Stars6,861
Commitjust now
LicenseMIT / AGPL-3.0

Hexclave is an open-source user-infrastructure platform for authentication, teams, payments, emails, and analytics, available as managed cloud or free self-hosting.

Cosmos Server

Cosmos Server

A security-hardened self-hosted cloud for home and small business

Stars6,173
Commitjust now
LicenseApache-2.0 WITH Commons-Clause and Anti-Tampering-Clause

Cosmos Server manages a personal cloud on hardware you own.

Alternative toCasaOS
YunoHost

YunoHostOpen

Debian-based server OS for self-hosting apps and email

Stars2,977
Commitjust now
LicenseAGPL-3.0

YunoHost is a Debian-based server operating system for self-hosting web apps, email, and user accounts without expert administration.

Alternative toCoolify
Defguard

Defguard

Self-hosted WireGuard VPN with per-connection MFA and built-in SSO

Stars2,857
Commitjust now
LicenseAGPL-3.0-only

Defguard is a self-hosted access platform that combines WireGuard VPN, identity management, and per-connection multi-factor authentication.

Alternative toAuthentikAuthgear
ClearFlask

ClearFlaskOpen

Open-source feedback boards with voting, roadmaps, and announcements

Stars451
Commitjust now
LicenseApache-2.0

ClearFlask is an open-source feedback platform where customers post ideas, vote on features, and follow a public roadmap and release announcements.

Alternative toTrelloJira
Wachd

WachdOpen

Self-hosted alert intelligence with AI root-cause analysis for on-call teams

Stars42
Commitjust now
LicenseApache-2.0

Wachd is a self-hosted alert intelligence platform that takes webhooks from Grafana, Datadog, and Prometheus, gathers context, strips PII, correlates events into a causal timeline, and sends a plain-English diagnosis to the on-call engineer.

Alternative toGrafana
Auth0

Auth0

Hosted identity covering login, SSO, and multi-factor

CompanyOkta
Since2013
PricingFreemium

Auth0 made outsourcing authentication respectable. Social providers, enterprise SSO, multi-factor, and the awkward edges of OAuth arrive already handled, with rules and actions for the parts that are specific to your product.

Okta

Okta

Workforce identity and access management for enterprises

CompanyOkta
Since2009
PricingPaid

Okta is aimed at employee identity rather than customer identity: single sign-on across hundreds of business applications, lifecycle provisioning tied to a HR system, and the access reviews auditors ask for.

Alternative toAuth0