head to head · open source
Better Auth vs os
Better Auth has 30,187 GitHub stars, 2,946 forks, 723 open issues and last shipped yesterday. os has 803 stars, 26 forks, 46 open issues and last shipped yesterday. Better Auth leads on adoption by 3,659% (30,187 vs 803 stars). Better Auth is written in TypeScript under MIT; os is written in TypeScript under MIT. Better Auth has attracted 10% as many forks as stars, os 3%. os was the more recently maintained of the two, and both are self-hostable with no licence fee.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| Better Auth | os | |
|---|---|---|
| GitHub stars | ★ 30K | ★ 803 |
| License | MIT | MIT |
| Written in | TypeScript | TypeScript |
| Last push | 2026-10-06 | 2026-10-06 |
| Forks | ⑂ 2.9K | ⑂ 26 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Better Auth if
- You weight community size — 30K stars and counting
- You want the MIT license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick os if
- You want the os feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and os fits your workflow better
About Better Auth
Better Auth is a framework agnostic authentication and authorization framework written in TypeScript. It targets the broader JavaScript/TypeScript ecosystem and is designed to integrate with any backend or frontend framework, including Next.js, Express, SvelteKit, and others. It provides a unified API surface for core identity workflows such as sign up, sign in, session management, and passwordless flows.
read the full Better Auth overview →
About os
ibl.ai/os is an MIT licensed, self hostable open source platform for building, deploying, and managing customizable AI agents across web, desktop, mobile, and browser, aimed at organizations that want to own their code and data.
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Frequently asked questions
Is Better Auth or os more popular?
Better Auth has 30,187 GitHub stars and os has 803. Better Auth has the larger community by that measure.
Are Better Auth and os free?
Both are open source. Better Auth is licensed under MIT and os under MIT. Neither carries a licence fee.
What is the difference between Better Auth and os?
Better Auth is written in TypeScript and os in TypeScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Better Auth or os?
Choose Better Auth if you want the larger community (30,187 stars) or its MIT licence terms. Choose os if its feature set, stack or MIT licence fits better. Both are self-hostable.