You can use Trezor or Ledger hardware wallets for U2F with recoverable seed word...

krrrh on May 9, 2018 | parent | context | favorite | on: Yubico and Microsoft Introduce Passwordless Login

You can use Trezor or Ledger hardware wallets for U2F with recoverable seed words. Even if you go with a Yubikey, which has a better form factor, one of these is a pretty good backup device since they can be further backed up to paper.