Token-based Single Sign On for your Apps and APIs with social, databases and enterprise identities
It provides auth, login, SSO, MFA, and is free for unlimited users. It provides secure, single-tenant, on-prem or private cloud identity, custom emails with localization, social logins, group-based auth and more. | It is an authentication SDK that lets users log in using only their Phone Numbers without a password. Integrate secure phone number login to your web/apps. It’s universal, works across apps, and doesn't require users to have a Cotter account. |
Authentication;
Registration;
Login;
SSO;
MFA;
User management;
Reporting;
Analytics;
Custom localized emails;
Social login;
Group and Role-based Auth;
macOS, Linux, Windows, Docker;
Any codebase | Skip passwords for a seamless experience; Skip Email and Phone Number Verification; Built by Developers, for Developers |
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A set of unified APIs and tools that instantly enables Single Sign On and user management to all your applications.

Stormpath is an authentication and user management service that helps development teams quickly and securely build web and mobile applications and services.

It is an Open Source Identity and Access Management For Modern Applications and Services. It adds authentication to applications and secure services with minimum fuss. No need to deal with storing users or authenticating users. It's all available out of the box.

Devise is a flexible authentication solution for Rails based on Warden

It provides backend services, easy-to-use SDKs, and ready-made UI libraries to authenticate users to your app. It supports authentication using passwords, phone numbers, popular federated identity providers like Google,

You can create unique identities for your users through a number of public login providers (Amazon, Facebook, and Google) and also support unauthenticated guests. You can save app data locally on users’ devices allowing your applications to work even when the devices are offline.

Start selling to enterprise customers with just a few lines of code.

OAuth is a protocol that aimed to provide a single secure recipe to manage authorizations. It is now used by almost every web application. However, 30+ different implementations coexist. OAuth.io fixes this massive problem by acting as a universal adapter, thanks to a robust API. With OAuth.io integrating OAuth takes minutes instead of hours or days.

OmniAuth is a Ruby authentication framework aimed to abstract away the difficulties of working with various types of authentication providers. It is meant to be hooked up to just about any system, from social networks to enterprise systems to simple username and password authentication.

It is a self-managed server that secures access to your applications and APIs with OAuth 2.0 and OpenID Connect. It is OpenID Connect Certified and optimized for latency, high throughput, and low resource consumption.