otp.com vs Sinch Verification API

otp.com plans

No prices published.

Sinch Verification API plans

• Pay-as-you-go verificationPriced on request

Pick otp.com if…

You want what its maker publishes above — check its page for the details.

Pick Sinch Verification API if…

The API suits developers adding phone verification or multi-factor authentication to account flows. Its REST APIs and Android and iOS SDKs support backend and mobile app integration.