The U2F Garden

Keys that use Bluetooth

IdemCard

IdemCard

For those willing to do the legwork, a holdable option for wireless authentication.
More information
Has been certified by the FIDO Alliance as conforming to FIDO2 standards Conforms to PKCS11 SmartCard interface standards Conforms to the U2F Authenticator/WebAuthn standard
Titan Key (Gen1)
This key is no longer recommended for use.

Titan Key (Gen1)

No longer supported, the first generation of Google’s Titan keys started the trend.
More information
Has been certified by the FIDO Alliance as conforming to FIDO2 standards Conforms to the U2F Authenticator/WebAuthn standard