Cotter Alternatives

Allow users to login without passwords

paid Free Trial $17.0 / Monthly

Strong authentication, without the passwords

Flagsmith lets you manage feature flags and remote config across web, mobile and server side applications. Deliver true Continuous Integration. Get builds out faster. Control who has access to new features. We're Open Source.

Try for free Open Source freemium

Amazon Cognito lets you add user sign-up, sign-in, and access control to your web and mobile apps quickly and easily. It scales to millions of users and supports sign-in with social identity providers and enterprise identity providers via SAML 2.0.

Open Source User Authentication - An Alternative to Auth0 / Firebase Auth / AWS Cognito

Open Source freemium

Auth0 is a program for people to get authentication and authorization services for their own business use.

Open Source

Application and Data, Application Utilities, and User Management and Authentication

Allow your users to sign-in without a password or OTPs

World-class out of the box Passwordless Multi-Factor Authentication (MFA) Anywhere technology, built specifically for developers and Fraud Ops teams. Implementation in hours, protection for a lifetime.

freemium $0.05 / Monthly (Only Pay For Active Users)

2FA codes in your browser, secured by the way you type

Complete user auth system installed with 8 lines of code.

Passwordless login with one-click, biometric, or QR-code

Log in to any website with your face or fingerprint.

Authorizer is an open-source authentication and authorization solution for your applications.

Open Source