##### Firebase Authentication

# Simple, multi-platform sign-in

## Provides backend services, easy-to-use SDKs, and ready-made UI libraries to authenticate users to your app.

[Get started](https://console.firebase.google.com/project/_/authentication/users) [View docs](https://firebase.google.com/docs/auth)

### Easy sign-in with any platform

Firebase Authentication aims to make building secure authentication systems easy, while improving the sign-in and onboarding experience for app users. It provides an end-to-end identity solution, supporting email and password accounts, phone auth, Google, Apple, X, Facebook, GitHub login, and more.
[Video](https://www.youtube.com/watch?v=8sGY55yxicA) ![Illustration of example U.I.](https://firebase.google.com/static/images/products/auth/auth-2.png)

### Flexible, drop-in UI

FirebaseUI provides a customizable, open source, drop-in auth solution that handles the UI flows for signing in users. The FirebaseUI Auth component implements best practices for authentication on mobile devices and websites, which can maximize sign-in and sign-up conversion for your app.

### Comprehensive security

Built by the same team that developed Google Sign-in, Smart Lock and Chrome Password Manager, Authentication securely applies Google's internal expertise of managing one of the largest account databases in the world.
![Illustration of comprehensive security](https://firebase.google.com/static/images/products/auth/auth-3.png) ![Illustration of mobile device](https://firebase.google.com/static/images/products/auth/auth-4.png)

### Fast implementation

It can take months to set up your own authentication system, and it requires an engineering team to maintain that system in the future. You can set up the entire authentication system of your app, capable of handling even complex cases like account merging, in under 10 lines of code.
Case Studies

### Learn how Authentication helps teams across the world improve app quality

![STAGE logo](https://firebase.google.com/static/images/usecases/stage-app.png)

##### STAGE uses Firebase and Flutter to cut release time in half


STAGE paired Flutter's front-end tools with Firebase's back-end services to build a multi-platform app. The app's infrastructure securely stores and delivers content to almost 2 million users in real time for a smooth viewing experience, which helps them stand out in India's competitive streaming market.
[Read more](https://firebase.google.com/case-studies/stage-app) ![Acintyo logo](https://firebase.google.com/static/images/usecases/acintyo.png)

##### Acintyo uses Firebase to streamline and speed up app development by 25%


With millions of users across 175 countries, the Galarm team used Firebase's fully-managed, scalable infrastructure to accelerate app development, automate tasks, and free up engineering time so they could focus on bringing their ideas to life.
[Read more](https://firebase.google.com/case-studies/acintyo-galarm-app)

### Documentation

Learn more about Authentication through our documentation.
[View docs](https://firebase.google.com/docs/auth)

### Pricing

Understand your charges and estimate your invoice on the pricing page.
[View pricing](https://firebase.google.com/pricing) Try Firebase today


Integrating it into your app is easy.
[Get started](https://console.firebase.google.com/)

#### All Firebase products

##### Build

- [App Check](https://firebase.google.com/products/app-check)
- [App Hosting](https://firebase.google.com/products/app-hosting)
- [Authentication](https://firebase.google.com/products/auth)
- [Cloud Functions](https://firebase.google.com/products/functions)
- [Cloud Storage](https://firebase.google.com/products/storage)
- [SQL Connect](https://firebase.google.com/products/sql-connect)
- [Extensions](https://firebase.google.com/products/extensions)
- [Firestore](https://firebase.google.com/products/firestore)
- [Hosting](https://firebase.google.com/products/hosting)
- [Phone Number Verification](https://firebase.google.com/products/phone-number-verification)
- [Realtime Database](https://firebase.google.com/products/realtime-database)
- [Firebase AI Logic](https://firebase.google.com/products/firebase-ai-logic)

[Generative AI](https://firebase.google.com/products/generative-ai)

##### Run

- [A/B Testing](https://firebase.google.com/products/ab-testing)
- [App Distribution](https://firebase.google.com/products/app-distribution)
- [Cloud Messaging](https://firebase.google.com/products/cloud-messaging)
- [Crashlytics](https://firebase.google.com/products/crashlytics)
- [Google Analytics](https://firebase.google.com/products/analytics)
- [In-App Messaging](https://firebase.google.com/products/in-app-messaging)
- [Performance Monitoring](https://firebase.google.com/products/performance)
- [Remote Config](https://firebase.google.com/products/remote-config)
- [Test Lab](https://firebase.google.com/products/test-lab)