Cotter Alternatives

Strong authentication, without the passwords

Allow users to login without passwords

paid Free Trial $17.0 / Monthly

B2B SaaS: Make your app enterprise-ready! Authentication - SAML/OIDC SSO, Directory Sync (SCIM 2.0), Audit Logs, Data Privacy Vault, and more!

Try for free Open Source free $49.0 / Monthly (Per connection)

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

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.

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

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

Complete user auth system installed with 8 lines of code.

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

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)

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

A web API that creates and validates one time passwords for your websites and apps through multiple channels, such as email, SMS and voice calls.

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

Open Source