Firestore

Firestore is a serverless, NoSQL document database: It delivers real-time data synchronization and elastic scaling for web, mobile, and Gen AI applications.

This is a fully managed, enterprise-grade document database built by Google Cloud. It utilizes a flexible NoSQL data model (documents in collections) and ensures strong consistency with ACID transactions. The core value proposition is real-time synchronization across all clients (iOS, Android, Web) and robust offline support, enabling reliable user experiences. Firestore scales automatically from zero to global traffic, offering up to 99.999% availability with multi-region replication. You can leverage native SDKs, a powerful query engine, and even use a MongoDB-compatible API for quick integration.

https://cloud.google.com/firestore