4.6 out of 5 stars
(192 Ratings)
FusionAuth is the authentication and authorization platform engineered for developers who demand flexibility and control. Built from the ground up to integrate with any stack, every feature — from user registration to MFA and SSO — is exposed via a modern, well-documented API.
Support for every major identity protocol is included out of the box: OIDC, SAML, OAuth2, JWT, passwordless login, social sign-on, and more. Whether you’re building a greenfield app or retrofitting auth into a legacy system, FusionAuth adapts to your use case — not the other way around.
Need compliance? FusionAuth helps you meet GDPR, HIPAA, and COPPA standards quickly and reliably.
Deploy it your way: install on Linux, Windows, macOS, Docker, or Kubernetes — or go with FusionAuth Cloud, our managed SaaS hosting. No black boxes. No vendor lock-in. Just powerful, customizable auth that works the way you do.
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4.4 out of 5 stars
(1122 Ratings)
Auth0 takes a modern approach to Identity and enables organizations to provide secure access to any application, for any user. Auth0 is highly customizable, and simple yet flexible. Safeguarding billions of login transactions each month, Auth0 delivers convenience, privacy, and security so customers can focus on innovation.
With Auth0, you can rapidly integrate authentication and authorization for web, mobile, and legacy applications, with new Fine Grained Authorization (FGA) that goes beyond role-based access control.
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Cyclr
Cyclr is an embedded integration toolkit (embedded iPaaS) for creating, managing and publishing white-labelled integrations directly into your SaaS application.
With a low-code, visual integration builder and a fully featured unified API for developers, all teams can impact integration creation and delivery.
Flexible deployment methods include an in-app Embedded integration marketplace, where you can push your new integrations live, for your users to self serve, in minutes.
Cyclr's fully multi-tenanted architecture helps you scale your integrations with security fully built in - you can even opt for Private deployments (managed or in your infrastructure).
Accelerate your AI strategy by Creating and publishing your own MCP Servers too, so you can make your SaaS usable inside LLMs.
We help take the hassle out of delivering your users' integration needs.
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StackOne
StackOne is an enterprise AI agent integration infrastructure platform designed to connect AI assistants and autonomous agents with software applications and business systems. The platform offers more than 570 prebuilt connectors and 35,000 executable actions across HRIS, CRM, applicant tracking, learning management, finance, customer support, identity management, and collaboration applications. Developers can integrate agents through Model Context Protocol, Agent-to-Agent communication, REST APIs, or Python and TypeScript SDKs. Managed authentication simplifies OAuth authorization, SAML authentication, API key management, token refresh, and credential handling across connected applications. Its AI Connector Builder enables developers to create custom integrations and actions for external APIs, including systems that do not have existing prebuilt connectors. StackOne's Falcon execution engine manages API requests, retries, error handling, data transformations, and other execution requirements for agent-driven workflows. Security and governance capabilities include granular permissions, prompt injection protection, user-level access controls, audit trails, and monitoring of agent activities. Dynamic tool discovery and managed data synchronization help agents retrieve relevant information and execute actions without loading unnecessary tool definitions or large datasets into their context windows. The platform supports cloud and self-hosted deployments, enabling organizations to build AI workflows for employee onboarding, sales operations, recruiting, financial processes, and customer support.
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