head to head · open source
authelia vs fido2-net-lib
authelia has 29,017 GitHub stars, 1,488 forks, 137 open issues and last shipped today. fido2-net-lib has 1,452 stars, 202 forks, 20 open issues and last shipped 2 days ago. authelia leads on adoption by 1,898% (29,017 vs 1,452 stars). authelia is written in Go under Apache-2.0; fido2-net-lib is written in C# under MIT. authelia has attracted 5% as many forks as stars, fido2-net-lib 14%. authelia was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (passkeys), so they are genuine substitutes rather than adjacent tools.
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
| authelia | fido2-net-lib | |
|---|---|---|
| GitHub stars | ★ 29K | ★ 1.5K |
| License | Apache-2.0 | MIT |
| Written in | Go | C# |
| Last push | 2026-09-20 | 2026-09-18 |
| Forks | ⑂ 1.5K | ⑂ 202 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick authelia if
- You weight community size — 29K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Go
- 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 authelia
Authelia is an open source authentication and authorization server written in Go that provides single sign on and multi factor authentication for web applications through a web portal, aimed at self hosters and platform teams who need to protect services sitting behind a reverse proxy.
read the full authelia 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 authelia or fido2-net-lib more popular?
authelia has 29,017 GitHub stars and fido2-net-lib has 1,452. authelia has the larger community by that measure.
Are authelia and fido2-net-lib free?
Both are open source. authelia is licensed under Apache-2.0 and fido2-net-lib under MIT. Neither carries a licence fee.
What is the difference between authelia and fido2-net-lib?
authelia is written in Go 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, authelia or fido2-net-lib?
Choose authelia if you want the larger community (29,017 stars) or its Apache-2.0 licence terms. Choose fido2-net-lib if its feature set, stack or MIT licence fits better. Both are self-hostable.