Firebase Firestore

NoSQL document database that stores and syncs data for mobile, web, and server applications. Uses a flexible collections-and-documents model with realtime listeners and offline persistence so apps stay responsive regardless of network conditions.

Trusted by hundreds of thousands of developers and used in production by teams at companies like Le Figaro and Hawkin Dynamics. Firebase Firestore differentiates from Realtime Database with richer querying, compound filters and sorting, multi-region scalability, and stronger consistency. It runs on Google Cloud infrastructure with automatic replication, ACID transactions, and optional MongoDB-compatible API in the Enterprise edition.

Key capabilities:

• Document model with collections, subcollections, and nested objects
• Realtime listeners and offline-first sync across iOS, Android, and web
• Expressive queries with chained filters, sorting, pagination, and indexes
• Security Rules and Firebase Auth for client access, IAM for server SDKs
• Native SDKs for Node.js, Java, Python, Go, Unity, C++, plus REST and RPC APIs
• Cloud Functions integration for serverless triggers on data changes

Teams adopt Firestore for collaborative apps, dashboards, and mobile backends where data must stay in sync across devices. Developers use it to build serverless apps without standing up their own backend, or pair it with traditional client libraries for hybrid architectures. Integrates with the broader Firebase and Google Cloud ecosystem for auth, hosting, and compute.