18.5
Authgear is an identity-as-a-service platform for authentication and user management in web and mobile applications.
Free planOpen sourceAndroidiOSWeb
Alternatives to Authsignal
28.5
SuperTokens is an open-source authentication provider for developers adding customizable sign-in and session management to applications.
Free planOpen sourceAndroidiOSWeb
38.3
FusionAuth is a Customer Identity and Access Management server for authentication, authorization, and user management.
Free planAndroidiOSWeb
- 4
Descope
Descope is a customer and agentic identity platform for authentication, user management, authorization, and identity journeys.
Free planAndroidiOSWebAPI7.6$249 usage-based - 5
MojoAuth
MojoAuth provides passwordless authentication for consumer apps through one API for customer sign-in across web and mobile.
Free planAndroidiOSWebAPI7.3From $120 a month - 6
miniOrange Multi-Factor Authentication
miniOrange Multi-Factor Authentication requires users to verify their identity with two or more factors before accessing an account or system.
Free planWebLinuxmacOSSelf-hosted7.2From $2 a month - 7
OpenOTP Authentication Server
OpenOTP Authentication Server is a multi-factor authentication server for securing network access with OTP and FIDO2.
Free planAndroidiOSWebAPI7.0Free plan - 8
Stytch
Stytch is an identity platform for applications used by people and AI agents, bringing authentication, authorization, and security tools together.
Free planAndroidiOSWebAPI7.0Free plan - 9
LinOTP
LinOTP is an open-source platform for multi-factor authentication, built to protect digital identities and transactions.
Free planAndroidiOSWebAPI6.9Free plan - 10
Sinch Verification API
Sinch Verification API provides phone number verification and multi-factor authentication for app sign-up, login, and password resets.
AndroidiOSWebAPI6.9 - 11
privacyIDEA
privacyIDEA is an open-source, modular authentication server for adding two-factor authentication to applications, VPNs, remote access, SSH, websites, and web portals.
AndroidiOSWebAPI6.7From €165 a month - 12
LoginRadius
LoginRadius is a fully managed Customer Identity and Access Management service for authentication, authorization, and identity administration.
AndroidiOSWebAPI6.5 - 13
TraitWare SDK
AndroidiOSWebAPI6.3 - 14
Twilio Verify
WebAPI6.3 - 15
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 - 16
Plivo Verify
Plivo Verify is an API for sending and validating one-time passwords used in two-factor authentication.
Free planWebAPI6.2Free plan - 17
Telesign Verify
AndroidiOSWeb5.5 - 18
Yubico SDKs
AndroidiOSLinuxmacOS5.4 - 195.1
- 20
Infobip 2FA
Web4.8 - 214.8
- 22
YubiCloud
Web4.7 - 234.3
- 244.3