| Auth0 | Flexible authentication and authorization platform for applications | apiKey | ✓ | ✓ | |
| GetOTP | API to quickly implement one-time password (OTP) verification flow | apiKey | ✓ | ✗ | |
| Micro User Service | User management and authentication microservice API | apiKey | ✓ | ✗ | |
| MojoAuth | Passwordless authentication platform for secure and seamless login | apiKey | ✓ | ✓ | |
| SAWO Labs | Passwordless authentication service for fast and secure user login | apiKey | ✓ | ✓ | |
| Stytch | Modern authentication infrastructure for developers and apps | apiKey | ✓ | ✗ | |
| Warrant | Authorization and access control APIs for your apps | apiKey | ✓ | ✓ | |