Authentication Open Source Tools

Alternative toSupabase

Backend-as-a-service platform built for AI coding agents

• 13,152 GitHub stars
• Apache-2.0Licence Apache-2.0
• #BaaS

Alternative toFirebase

Firebase alternative: GraphQL, Postgres auth, and file storage

• 9,364 GitHub stars
• MITLicence MIT
• #BaaS

Alternative toTeamSpeak

Free open source low-latency voice chat for gaming teams

• 8,351 GitHub stars
• BSD-2-ClauseLicence BSD-2-Clause
• #Chat

Alternative toXano

One YAML file gives your app auth, CRUD, storage, and admin UI

• 7,595 GitHub stars
• MITLicence MIT
• #BaaS

Alternative toAWS Amplify

Open source Apple SDK for Firebase auth, data, push and crashes

• 6,974 GitHub stars
• Apache-2.0Licence Apache-2.0

Alternative to1Password

Open source team password manager with sharing and audit

• 6,180 GitHub stars
• AGPL-3.0Licence AGPL-3.0
• #Security

Alternative toGitHub

Self-hosted Git forge for teams that want platform independence

• 5,688 GitHub stars
• GPL-3.0Licence GPL-3.0

Alternative toKong Konnect

Unified API keys, gateways, and observability for developers.

• 5,471 GitHub stars
• FSL-1.1-ALv2Licence FSL-1.1-ALv2

Alternative toPermit.io

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

• 3,488 GitHub stars
• Apache-2.0Licence Apache-2.0

InAI & Machine Learning

Control Codex agents from your iPhone, open source and free

• 3,345 GitHub stars
• Apache-2.0Licence Apache-2.0