Instant 2FA is hosted two-factor authentication that lets developers add two-factor auth support to any website or app in 30 minutes. It takes 3 API calls to integrate and doesn't require any database or user experience changes. Instant 2FA is built by the team at Clef that has been building more secure 2FA options for 4+ years, and will be completely open source once it's launched out of beta.

Out of the box, Instant 2FA supports Google Authenticator (TOTP), text messages (SMS), and Yubikey (U2F) with one integration. Developers can enable any or all of the different 2FA options, and then users can pick whichever option suits them best.