Top 20 products relevant to Authentication and SSO

FusionAuth is a CIAM platform that is 100% free for unlimited users.

Open Source freemium

Salesforce Identity streamlines the user access with a single login and helps to discover the power of a single, trusted identity for employees, partners, and customers.

Silverfort Enables strong authentication for any sensitive asset across entire networks and cloud environments, without any modifications to endpoints and servers.

Clerk is a complete suite of embeddable UIs, flexible APIs, and admin dashboards to authenticate and manage your users.

Open Source

authentik is an open-source identity provider focused on flexibility and versatility.

Open Source

Developer-first Access Management.

Open Source

Central authentication & authorization for web and mobile applications with Single Sign On, OAuth2 and LDAP.

Authelia is an open-source authentication server providing SSO and two-factor for your applications running behind NGINX.

Open Source

Kinde provides Authentication tools and infrastructure to helps SaaS businesses accelerate their product development. Every day, Kinde gives the best teams in the world, everything they need to build, secure, monetize, and manage a more modern web.

freemium $25.0 / Monthly (Professional plan starting from 10,500 monthly active users)

LemonLDAP::NG is a free software to provide WebSSO, Access Management and Identity Federation.

Single sign-on solution specifically built for modern FOSS hosted services.

FreeRADIUS is responsible for authenticating one third of all users on the Internet.

Open Source

Secure any online application with your mobile app.

Open-source Auth0/Clerk Alternative.

Pomerium is an identity-aware proxy that enables secure access to internal applications.

Open Source

Looking for a hassle-free authentication solution? Engity is your GDPR-compliant, European, fully scalable, managed & flexibly customizable Identity & Access Management Provider.

paid €0.01 / Monthly (per User)

CAS provides enterprise single sign-on service for the web.

Apache Syncope is an open source system for managing digital identities in enterprise environments.

Secure localStorage data with encryption and compression.

ORY Hydra is an OAuth 2.0 server with OpenID Connect support - cloud native, security-first, open source API security for the infrastructure.