head to head · open source
Better Auth vs fido2-net-lib
Better Auth has 30,019 GitHub stars, 2,896 forks, 723 open issues and last shipped today. fido2-net-lib has 1,452 stars, 202 forks, 20 open issues and last shipped 2 days ago. Better Auth leads on adoption by 1,967% (30,019 vs 1,452 stars). Better Auth is written in TypeScript under MIT; fido2-net-lib is written in C# under MIT. Better Auth has attracted 10% as many forks as stars, fido2-net-lib 14%. Better Auth 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 | fido2-net-lib | |
|---|---|---|
| GitHub stars | ★ 30K | ★ 1.5K |
| License | MIT | MIT |
| Written in | TypeScript | C# |
| Last push | 2026-09-20 | 2026-09-18 |
| Forks | ⑂ 2.9K | ⑂ 202 |
| 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 fido2-net-lib if
- You want the fido2-net-lib feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches C#
- You evaluated both and fido2-net-lib 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 fido2-net-lib
fido2 net lib is an open source, MIT licensed C library that provides a FIDO2 server and WebAuthn relying party implementation for .NET, aimed at developers who want passkey registration and sign in in ASP.NET Core, .NET Core and native .NET applications without writing the credential validation logic themselves.
read the full fido2-net-lib overview →
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Frequently asked questions
Is Better Auth or fido2-net-lib more popular?
Better Auth has 30,019 GitHub stars and fido2-net-lib has 1,452. Better Auth has the larger community by that measure.
Are Better Auth and fido2-net-lib free?
Both are open source. Better Auth is licensed under MIT and fido2-net-lib under MIT. Neither carries a licence fee.
What is the difference between Better Auth and fido2-net-lib?
Better Auth is written in TypeScript and fido2-net-lib in C#. 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 fido2-net-lib?
Choose Better Auth if you want the larger community (30,019 stars) or its MIT licence terms. Choose fido2-net-lib if its feature set, stack or MIT licence fits better. Both are self-hostable.