Userfront is described as 'makes it easy to add authentication, access control, SSO, and multi-tenancy to any web application' and is an app in the Development category. There are more than 10 alternatives to Userfront for a variety of platforms, including Online / Web-based, SaaS, Self-Hosted solutions, Windows and Linux. The best alternative is Firebase, which is free. Other great apps like Userfront are Keycloak (Free, Open Source), Auth0 (Freemium), LoginRadius (Paid) and FusionAuth (Paid).
You can connect any application (written in any language or on any stack) to Auth0 and define its Connection, the method used to authenticate the users of that application: • Custom credentials: username + passwords • Social network logins: Google, Facebook, Twitter...
FusionAuth is auth for any app. Get everything you need for secure registration and user management in minutes. Single-tenant, on-prem or private cloud, custom emails with localization, social login, and more.
Ory builds cloud-native authentication (login), authorization (permission), delegation (OAuth2, OpenID Connect), and user management software. You can deploy what you need yourself or use the Ory Cloud Platform and get started in minutes.
Amazon Cognito lets you add user sign-up/sign-in and access control to your web and mobile apps quickly and easily. Cognito scales to millions of users, and supports sign-in with social identity providers such as FB, Google, and Amazon, and SAML 2.0.
JustAuthenticateMe offers a simple authentication-as-a-service for your web apps. It uses magic links in emails as a way to verify identity so that neither you nor your users have to worry about passwords.