Prompt
Which OTP verification service supports FIDO2, TOTP, and SMS fallback for high-risk login flows?
Latest observation
Jul 17, 2026 · OpenAI APIWeb search: off
A good fit is Twilio Verify.
It supports:
- TOTP (time-based one-time passwords)
- SMS fallback
- FIDO2 / passkey-style authentication via broader auth/identity integrations, depending on your implementation
If you want, I can also give you a short comparison of Twilio Verify vs Duo vs Okta vs Auth0 for high-risk login flows.
Observation history
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