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Dev tools · alternatives · 2026

24 alternatives to Solo, open source FIDO2 security key

Solo 1 firmware in C. Contribute to solokeys/solo1 development by creating an account on GitHub.

Solo is an open source FIDO2 security key for developers and security-conscious users. It provides hardware-based authentication for protecting accounts and services that support the FIDO2 standard. The device stands… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Solo, open source FIDO2 security key launched in 2018; newer entries below may have overtaken it.

  1. 1
    SoloKeys▲139

    Secure login made open and easy 🔒

    2018 · solokeys.com · its alternatives →

  2. 2
    Solo▲12

    The first open source FIDO2 security key. USB & NFC

    2018 · kickstarter.com · its alternatives →

  3. 3

    Open security key to protect your Gmail, Twitter, GitHub, ..

    2021 · indiegogo.com · its alternatives →

  4. 4

    Solo 1 firmware in C. Contribute to solokeys/solo1 development by creating an account on GitHub.

    2018 · github.com · its alternatives →

  5. 5
    Corbado▲571

    Passkey-first authentication for developers

    2024 · corbado.com · its alternatives →

  6. 6
    Soloop▲469

    Approval-first Agent OS for solo founders

    Aug 2026 · soloop.io · its alternatives →

  7. 7

    Open source Yubikey alternative with dual USB-C and USB-A

    2021 · onlykey.io · its alternatives →

  8. 8

    Open-source Auth0/Clerk alternative

    2024 · hexclave.com · its alternatives →

  9. 9
    OnlyKey▲118

    OnlyKey is an open source alternative to YubiKey

    2019 · onlykey.io · its alternatives →

  10. 10

    Solo 2 firmware in Rust. Contribute to solokeys/solo2 development by creating an account on GitHub.

    Apr 2026 · github.com · its alternatives →

  11. 11

    A Virtual FIDO2 USB Device. Contribute to bulwarkid/virtual-fido development by creating an account on GitHub.

    2022 · github.com · its alternatives →

  12. 12

    Use Touch ID / Secure Enclave for SSH Authentication! - sekey/sekey

    2017 · github.com · its alternatives →

  13. 13
    OwnID▲201

    An easy and secure passwordless add-on for your website

    2022 · ownid.com · its alternatives →

  14. 14

    Skip migration and launch MCP with built-in Auth

    Nov 2025 · arcade.dev · its alternatives →

  15. 15KS

    Hi HN! I built KeyPub.sh to solve the problem of user verification for CLI applications. It's essentially OAuth for the terminal, but using SSH keys that developers and users already have. - No installation needed - works with existing SSH setup - Privacy-focused: users control what email info is shared - Simple email verification process - Free public service - Perfect for CLI app developers who don't want to build user verification Try it with: `$ ssh keypub.sh about` Source code: https://github.com/skariel/keypub

    2024 · keypub.sh · its alternatives →

  16. 16

    This is a community forum for people who use, build, and run things on Nostr. Whether you are taking your first steps with keys and zaps, ship relays and clien…

    22d ago · nostr-proto.org · its alternatives →

  17. 17

    Develop faster, eliminate complexity, protect your secrets

    2022 · 1password.com · its alternatives →

  18. 18

    Free & open source security scanner for developers

    2023 · cycode.com · its alternatives →

  19. 19RT

    Every privacy-focused DNS service requires an account: NextDNS, Cloudflare for Families, Apple's iCloud Private Relay (paid, iOS-only). The protocol that doesn’t require one - ODoH - had basically one well-known public relay operator (Frank Denis on Fastly Compute, default in dnscrypt-proxy). I built a second one and the client to talk to it.

    May 2026 · numa.rs · its alternatives →

  20. 20
    OneKey▲74

    Secure & community driven crypto wallet trusted by millions.

    2022 · onekey.so · its alternatives →

  21. 21

    Open-source protocol for a decentralized, user-owned web

    2024 · pubky.org · its alternatives →

  22. 22

    A curated list of free OSS developer-first security tools

    2022 · its alternatives →

  23. 23

    Security key with dual support for USB-C and Lightning

    2019 · yubico.com · its alternatives →

  24. 24

    Hey HN! Happy to finally launch Stack. We made it because we like to put apps into production quickly, and authentication & user management was taking up way too much time. We have components like and that automatically adapt to whatever theme & design system you're using. Check the blog post to see the example with Radix UI and Joy UI. Also, there's an admin dashboard for monitoring and editing accounts. Stack is 100% AGPL/MIT-licensed, so you can self-host it. Cheers!

    2024 · stack-auth.com · its alternatives →

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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →