The best authentication & identity tools in 2025
What are authentication & identity tools?
Authentication and identity tools are software solutions that verify and manage user credentials to ensure secure access to digital platforms. These tools include methods like passwords, biometrics, and multi-factor authentication to authenticate users and protect sensitive data. They also handle user identity management, enabling businesses to control and monitor user access across various systems and applications.
Firebase
—An app development platform backed by Google
An app development platform that helps you build and grow apps and games users love. Backed by Google and trusted by millions of businesses around the world.
Clerk
—An authentication and user management platform
A complete suite of embeddable UIs, flexible APIs, and admin dashboards to authenticate and manage your users.
Appwrite
—100% open source alternative for Firebase
A secure open-source backend server provides the core APIs required to build web and mobile applications. Appwrite provides authentication, database, storage, functions, messaging, and advanced realtime capabilities.
Auth0
—Secure access for everyone. But not just anyone.
Whether you’re a developer looking to innovate or a security professional looking to mitigate, we make identity work for everyone. Auth0 is the solution you need for web, mobile, IoT, and internal applications. Loved by developers and trusted by enterprises.
PropelAuth
—Authentication that works before you write any code
PropelAuth hosts and manages your authentication. Features like social logins, magic links, or managing profile pictures can be added in a single click. With our B2B support, your users can create organizations and invite their team members out of the box.
Recognito Identity Verification SDKs
—NIST FRVT Top #1 Face Recognition Algorithm DeveloperRecognito is a global leader in Face Biometric and ID Document Verification SDKs for Identity Verification Solutions. We offer on-premise Face Recognition, Liveness Detection and ID Document Recognition, Liveness Detection SDKs for server and mobile. Try out our product online: https://recognito.vision/face-biometric-playground/ https://recognito.vision/id-document-verification-playground/
Persona
—Identity verification for any use case, starting at $0
Persona offers a suite of fully-automated identity verification components with worldwide coverage that can be configured and branded to create custom-tailored flows for any use case. Sign up for the Starter plan and start for free in <10 minutes.
Cloaked is a people-first privacy app that generates virtual identities to protect your personal data. No one should have to choose between staying connected and personal privacy — with Cloaked, you can try new products, travel, shop, and even meet new people while staying in control of your data. Unique and unlimited phone numbers, passwords, and payments set us apart from other privacy tools and password managers. Go ahead and give them your (Cloaked) info — and say goodbye to spam forever.
Hydro is a blockchain-based identity management app. The app's current phase, Raindrop, offers users a blockchain-based 2FA protocol. Later phases include identity management and document signing blockchain functionality. **Please reach out if you are interested in implementing blockchain 2FA on your website! anurag@hydrogenplatform.com**
