17.5
2Factor.in OTP API is a web service for working with one-time passwords through a REST API and SDKs.
Free planAndroidiOSWeb
Alternatives to MSG91
27.2
Gupshup provides conversational AI for marketing, commerce, and customer support automation.
Free planWebAPI
36.9
Sinch Verification API provides phone number verification and multi-factor authentication for app sign-up, login, and password resets.
AndroidiOSWeb
- 4
Dollu Voice API
Free planWebAPI6.3Free plan - 5
Twilio Verify
WebAPI6.3 - 6
Bird Verify
Bird Verify confirms control of a phone number or email address by sending a code and checking the response.
Free planWebAPI6.2Free plan - 7
Clickatell Verify
Free planWebAPI6.2Free plan - 8
Plivo Verify
Plivo Verify is an API for sending and validating one-time passwords used in two-factor authentication.
Free planWebAPI6.2Free plan - 9
ValueFirst RCS Business Messaging
ValueFirst RCS Business Messaging lets businesses send branded, conversational messages through RCS.
WebAPI5.7 - 10
Telesign Verify
AndroidiOSWeb5.5 - 11
otp.com
AndroidiOSWeb5.2 - 12
Veriph.One Phone Verification SDK
AndroidiOSWeb5.2 - 135.1
- 14
Infobip 2FA
Web4.8 - 154.8
- 164.7
- 174.7
- 184.6
- 19
OTP Gateway
Web4.6 - 20
OTP.dev
Web4.6 - 214.6
- 224.3
- 234.3