Firebase App Platform

Firebase is a mobile and web application development platform that provides a suite of backend services including real-time databases, authentication, file storage, hosting, cloud functions, analytics, crash reporting, and machine learning tools, designed to help teams build and ship applications quickly without managing infrastructure. The Firestore database is a serverless, NoSQL document store that syncs data across client applications in real time through WebSocket connections, supporting offline persistence where reads and writes are queued locally and synchronized when connectivity returns, with security rules that enforce authorization at the document and field level through a declarative expression language. Authentication supports email and password, phone number, anonymous, and federated login through Google, Apple, Facebook, Twitter, GitHub, Microsoft, and Yahoo, with identity platform integration for enterprise SAML and OIDC providers. Cloud Functions execute backend code in response to HTTPS requests, database triggers, authentication events, Analytics events, and Cloud Storage changes, running in a managed Node.js or Python runtime with automatic scaling from zero to millions of invocations. Cloud Storage provides object storage for user-generated files with CDN delivery and security rules matching the database authorization model. Hosting serves static and dynamic content through a global CDN with automatic SSL certificates, preview channels for branch-based testing, and one-command deploys from the CLI. The platform also provides A/B testing, remote configuration for feature flags without app updates, in-app messaging, predictive analytics that identify user churn risk, and the ML Kit for on-device text recognition, translation, and image labeling. Now part of Google Cloud, the platform serves millions of applications including those built by Alibaba, Duolingo, The New York Times, and Trivago.