Free Authentication & User Management
Authentication services provide ready-made systems for handling user login, registration, password resets, and secure access to your apps. They also manage user profiles, support social login options, multi-factor authentication, and team or organization features. These tools allow developers and students to add secure login capabilities quickly without writing complex security code from scratch. This saves time, reduces security risks, and helps you launch apps faster. The platforms are ideal for personal projects, learning, startups, and small teams who want professional-grade user management at no initial cost. You can focus on building the main features of your app while these services handle secure user accounts and access control reliably. Every service listed here offers a genuine free tier that persists beyond a short trial, so you can shortlist practical options before you commit to a vendor.
Category directory
Compare free authentication & user management options
Review the services below, open the details sheet to inspect the free-tier limits, and then jump to the official site when you are ready to validate the latest plan terms.
Auth0
Auth0 is a popular hosted service that makes it easy to add secure login to websites and mobile apps. It supports social login from Google, Facebook and others, single sign-on, multi-factor authentication, and protection against weak or breached passwords. Developers use it because it works across many programming languages and provides detailed logs and security features. The free plan supports a high number of active users each month, making it suitable for testing ideas, building prototypes, and running small to medium applications. Students and independent developers appreciate its excellent documentation and quick setup, which lets them add professional authentication without spending weeks on security details.
Free tier snapshot
Up to 25,000 Monthly Active Users (MAU), unlimited social connections, custom domains on higher free usage, and core authentication features
Clerk
Clerk offers modern user management with beautiful ready-made screens for sign-up, sign-in, profile editing, and team organizations. It handles passwords, social login, multi-factor authentication, and user roles in a clean and developer-friendly way. The service is especially loved for its attractive default user interface components that work well with popular frontend frameworks. The generous free tier supports a large number of users, which is perfect for personal projects, indie apps, and early-stage products. Developers can get started in minutes and deliver a polished login experience without designing everything themselves. It continues to be a top choice for teams that want speed and great user experience out of the box.
Free tier snapshot
Free up to 50,000 Monthly Retained Users (or MAU equivalent), unlimited applications, and core user management features
Supertokens
Supertokens is an open-source authentication solution that you can integrate directly into your own application or use through their managed cloud service. It supports email/password login, social providers, session management, and advanced features like multi-factor authentication. Because it is open-source, you have full control over your user data when self-hosting. The managed cloud offers a free tier with a solid user limit for starting projects. It is a great option for developers who want flexibility, transparency, and the ability to avoid vendor lock-in. Students and teams building long-term applications often choose it for its modern architecture and clear pricing model.
Free tier snapshot
Up to 5,000 MAU on managed cloud, completely free and unlimited when self-hosted (only your server costs apply)
Logto
Logto is a modern identity platform designed for building secure authentication and authorization in apps. It supports social login, passwordless options, organizations, and fine-grained access control. You can use the open-source version by self-hosting or choose their cloud service. The free cloud plan provides enough capacity for personal projects and small applications. Developers appreciate its clean APIs and focus on both consumer and business use cases. It works well for web, mobile, and backend services. The combination of open-source flexibility and a generous hosted free tier makes it attractive for learners, indie hackers, and teams that value control along with ease of use.
Free tier snapshot
Up to 50,000 MAU on the free cloud plan, plus open-source self-hosted version with no usage limits
Kinde
Kinde provides simple yet powerful authentication with support for single sign-on, multi-factor authentication, organizations, and detailed permission settings. It includes ready-to-use components and works smoothly with many frontend frameworks. The service focuses on making setup fast while keeping security strong. The free plan includes a good number of active users every month, which supports learning projects, personal apps, and small business tools. Developers like its transparent approach and helpful dashboard. It is especially useful when you need both consumer-facing login and business-oriented features such as team management in one place without high costs at the beginning.
Free tier snapshot
Up to 10,500 Monthly Active Users (MAU) free forever on the starter plan, with core authentication and management features
WorkOS
WorkOS specializes in enterprise-ready authentication features such as single sign-on, directory synchronization, and user management for business customers. It is particularly strong for B2B applications that need to connect with company login systems. The platform offers generous free usage for user management, allowing a very high number of active users before any charges apply. This makes it excellent for startups building SaaS products aimed at businesses. Developers can add professional enterprise features quickly while keeping costs low in the early stages. It is a smart choice when your app needs to support both individual users and larger organizations with advanced security requirements.
Free tier snapshot
First 1,000,000 Monthly Active Users free for User Management, plus limited free SSO and directory features
Ory
Ory is a security-focused platform built around modern standards like OAuth2 and OpenID Connect. It provides identity management, authentication, authorization, and zero-trust security features. You can self-host the open-source components or use their cloud service. The free developer accounts offer enough capacity for testing and small projects. It is favored by teams that need strong security, compliance, and customization options. The platform supports complex use cases while remaining accessible for developers who want reliable identity infrastructure. Its open-source nature combined with managed options gives flexibility for both learning and production-level applications.
Free tier snapshot
Free developer accounts with limited daily active users and permission checks, plus fully open-source self-hosted version with no usage caps
Always verify free tier limits directly on the provider's website before using in production — free tiers can change over time.