[1bent]

Are there any open source passkey implementations?

My password manager of choice is open source, and cross-platform, and can export and later (or elsewhere) import an encrypted backup.

[Ciantic]

Yes, https://bulwark.id/ and it's fully on software, it looks pretty cool. I haven't tested it and can't vouch for it but it's author [1] was commenting here that's why I found it.

[1]: https://news.ycombinator.com/item?id=35854698

[FlxMgdnz]

We’re building https://www.hanko.io

It’s a passkey-first authentication solution for websites and mobile apps.