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Top User Authentication Solutions
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OTPLESS
Authenticate customers with WhatsApp, SMS, Email, Biometrics, and more, with a 98% conversion rate on signup and sign-in.
Gluu Server
Gluu offers various authentication solutions based on open-source software. There is a self-hosted solution, a managed solution, and a free fully open-source solution based on the Linux Foundation Janssen Project.
OTPless
Authenticate customers with WhatsApp, SMS, Email, Biometrics, and more. The conversion rate on signup and sign-in is 98%.
Firebase
Google's Firebase is an entire app development platform that's packed with features.It comes with storage, cloud functions, monitoring and, of course, user authentication. The free tier comes with 50,000 MAUs. Beyond that pricing start at $0.0055/MAU and goes down to as low as $0.0025/MAU as you scale to millions of users. Firebase authentication supports email and password auth, phone auth, magic links, two-factor authentication and social identity providers - mainly Google, Google Play Games, Facebook, Apple, Microsoft, Twitter, GitHub and OAuth access tokens.
GoPasswordless
GoPasswordless is an authentication service and SDK that focuses on enabling passwordless authentication flows in web apps.
Appwrite
Appwrite is an open-source platform for building scalable applications. It comes with authentication, databases, storage, and functions. It's basically a complete development platform. They have an extremely generous free plan with 75,000 MAUs free of charge and their Pro plan is only $15/month. Appwrite offers email and password login, phone auth, magic links, email OTP, anonymous login, JWT login, SSR login, custom tokens, and two-factor authentication.
Auth.js
Formerly known as NextAuth. It's is an open-source authentication library originally built for NextJS. Auth.js is free to use and comes with over 80 integrations for various third-party identity providers such as Google, Facebook, Auth0, Apple etc. You can use it with your own database if you choose to. It works with MySQL, Postgres, MSSQL and MongoDB. Auth.js is compatible with Next.js, SvelteKit and SolidStart as of March 2024.
Auth0
Auth0 is a flexible, drop-in solution to add authentication and authorization services to your applications. Your team and organization can avoid the cost, time, and risk that come with building your own solution to authenticate and authorize users.
Clerk
Clerk is a comprehensive authentication and user management platform. It comes with embeddable UIs, APIs and admin dashboards for user management. Clerk offers official SDKs for Next.js, React, JavaScript, Node.js, Remix, Go, Gatsby, and Ruby / Rails. There are many more community SDKs for other frameworks and languages. They have a free tier of 10,000 MAUs and a $25/month Pro tier with $0.02/MAU. Enhanced authentication, with SMS auth, device tracking and revocation, simultaneous sessions and SAML authentication costs additional $100/month. Admin add-on, with user impersonation and enhanced roles is another $100/month.
Ory
Ory is an API-first identity manager. They offer authentication, analytics, access control, machine-to-machine authentication and more. They have SDKs for the major languages: - Dart - .NET - Elixir - Go - Java - JavaScript - PHP - Python - Ruby - Rust Unfortunately, they don't offer a free tier. Pricing starts at $29/month and includes 1,000 daily active users. Then it's $30 / 1,000 additional DAUs.
WADesk
WADesk is a professional client solution that enables simultaneous logins for multiple WhatsApp accounts, empowering users to seamlessly manage tasks like bulk messaging, number verification, automated conversations, auto-replies, and quick responses. It also facilitates chat message transfer, real-time local backups, rapid export of group members, and monitoring of group messages. Designed for corporate collaboration, WADesk allows employees to share corporate contact details efficiently, enhancing teamwork and productivity across the organization.
SaaS Software
SaaS Software is a directory of all software-as-a-service products. It includes regular, open source, and AI-bases SaaS. There is a ton of category-based filters such as billing, fashion & style, CMS, video etc. It's free to submit your own product.
Auth0 by Okta
Auth0 is Okta's B2C identity management solution. It's an all-in-one package, with social login, bot detection, UI components, anonymous users, single-sign-on, MFA etc. The free tier comes with 7,500 MAUs. That said, it's relatively expensive and 20,000 MAUs will cost you $1400/month.
Certifast
Tired of manually creating each certificate and wasting hours on repetitive tasks? Certifast is here to simplify your life! Designed for anyone who needs to generate certificates quickly and efficiently, Certifast is your go-to solution. Here's what makes Certifast stand out: - Bulk Creation in Seconds: Generate thousands of certificates at once, saving you time and effort. - Easy Customization: Personalize each certificate with names, grades, or unique numbers effortlessly. - User-Friendly Interface: No design skills needed—navigate through Certifast with ease and choose from a variety of templates. - High-Quality Results: Every certificate is produced in high resolution, perfect for printing or digital use. - Seamless Data Integration: Import data from CSV files to automatically fill in certificate details and reduce errors. - Versatile Application: Ideal for schools, businesses, events, and more, Certifast adapts to any setting where certificates are needed. Certifast is more than just a certificate maker—it's a time-saving tool designed to enhance your productivity. Say goodbye to manual certificate creation and hello to the simplicity of Certifast. Try Certifast today with our free trial and see how easy certificate creation can be!
Stytch
They market themselves as the leading Auth0 alternative. There is a free starter plan with up to 25 organizations and 1000 members. Additional users costs $0.05 per monthly active user.
Okta
Okta is an identity provider for organizations. It offers enterprise solutions for managing workforce and employee identities. It's HIPAA BAA and PCI compliant.
Amazon Cognito
The biggest advantage of Cognito is that it's a part of the AWS ecosystem and integrates well with other AWS services. The free tier comes with 50,000 MAUs and the price for each additional MAU starts at $0.0055/month and goes down to as low as $0.0025/month as you scale to tens of millions of users. It integrated with four federated identity providers - your users can sign up with Facebook, Google, Apple and Amazon.
Supabase
Supabase is the open-source alternative to Firebase. Like Firebase, it's a complete app development platform with user authentication, cloud functions, APIs, Postgres database, storage, vector embeddings, and other features. Supabase projects come with PostgreSQL's policy engine for fine-grained user access rules. It has social login integrations with Google, Facebook, GitHub, Azure (Microsoft), Gitlab, Twitter, Discord, and many more. They offer a customizable authentication component for React. Phone login and MFA can be added through third-party SMS providers such as Twilio or Bird. The free tier comes with 50,000 monthly active users. The Pro plan, at $25/month, comes with 100,000 MAUs and $0.00325/MAU beyond that.
Keycloak
Keycloak is an open source identity and access management solution. It supports Keycloak single-sign-on and OpenID Connect or SAML 2.0 Identity Providers (Google, Facebook, GitHub etc).
Google Gemini
Integrate Gemini with your gmail and start talking to your email!
AWS Cognito
Amazon Cognito is an identity platform for web and mobile apps. It’s a user directory, an authentication server, and an authorization service for OAuth 2.0 access tokens and AWS credentials. With Amazon Cognito, you can authenticate and authorize users from the built-in user directory, from your enterprise directory, and from consumer identity providers like Google and Facebook.
YawDev
IT-Services for SaaS, Business and Enterprise. Innovative solutions that enhance productivity, streamline workflows, and drive growth.
Lucia Auth
Lucia is an open source auth library that abstracts away the complexity of handling sessions. It works with any JS runtime - Node.js, Bun, Deno, Cloudflare Workers. It's also fully typed. It integrates with MongoDB. PostgreSQL, MySQL, SQLite, and with their respective ORMs and query builders.
Self-Hosted Software List
Self-Hosted Software List is a directory of the top self-hosted solutions in various categories. List there if you're working on a product that the users can host themselves. Submitting your products to Self-Hosted Software List is free.
DigitalGondola
The source of truth for Software-as-a-Service buying advice. Over 750+ SaaS, Micro-SaaS & Digital Services reviewed, compared, and analyzed.