Authgear ONCE

Open-source authentication platform for developers — add login, signup, and user management to your apps

Visit Website
authgear.com
Verified API available Free tier ~18k monthly visits
Quick facts
What is it Open-source authentication platform for developers — add login, signup, and user management to your apps
Pricing Freemium
Free tier Yes
Platform Web Application
API Yes
Best for Adding login functionality to applications, Managing user authentication systems
Domain registered 2020

Data updated Aug. 1, 2026

What does Authgear ONCE do?

Authgear ONCE is an open-source authentication platform designed to help developers implement secure login and user management systems for their applications. The service provides the infrastructure needed to handle user authentication, signup flows, and account management without requiring teams to build these complex systems from scratch. It handles the security aspects of user authentication while giving developers control over the user experience. The platform operates as a web-based service that integrates with existing applications through API connections. What makes Authgear ONCE stand out is its open-source nature combined with a generous free tier that supports unlimited monthly active users. While the free version includes Authgear branding, the platform offers enterprise options with custom support, service level agreements, and compliance features for organizations with specific requirements. The service is built with transparency in mind, allowing developers to understand and customize the authentication flow to match their application's needs. Authgear ONCE is particularly useful for development teams building web or mobile applications that require user accounts. It saves significant development time by providing a ready-made authentication system that handles security best practices, password management, and user session handling. Companies looking to implement secure login systems without maintaining their own authentication infrastructure will find this tool valuable, especially when they need to meet specific compliance standards or scale their user base efficiently.

#authentication#developer tools#open source#saas#security#user management

Key features

What makes it stand out
01
Open-source authentication with unlimited MAUs
02
Free tier with Authgear branding included
03
Custom support plans for enterprise needs
04
Compliance and SLA options available
05
User management and login functionality

Who is Authgear ONCE for?

Who benefits most from this tool
Adding login functionality to applications
Managing user authentication systems
Implementing secure user management

Pricing

Free tier available — start without a credit card

Authgear.com

Free
  • Authgear branding
  • Unlimited MAUs

Trust & presence

Domain Domain registered 2020

Gallery

Click any image to enlarge

Similar tools

UsageGuard Verified Developer Tools

Enterprise platform for AI development observability, security, and cost control across multiple LLM providers.

CloudEagle.ai Verified Subscription Management

AI-powered platform to discover, manage, and optimize your company's SaaS app usage, security, and spending.

Stack Auth Verified Development

Open-source authentication suite for user management, teams, and OAuth integration in Next.js apps

Codeless ONE Verified No-Code&Low-Code

AI-powered no-code platform that builds custom business apps from natural language descriptions in minutes

authzed Verified Developer Tools

Authorization infrastructure platform — manage user permissions across your entire application ecosystem with a centralized system.

Beagle Security Verified Pentesting

AI-powered platform that automates penetration testing for web apps and APIs, finding vulnerabilities with human-like precision.

Ushur Verified AI Agent

Enterprise platform for automating customer service workflows with AI agents in regulated industries like healthcare and insurance.

Authentica Verified AI API

Unified identity verification platform — OTP, SSO, biometrics, and access control for Saudi enterprises

n8n
Share X LinkedIn Telegram
Authgear ONCE Visit