About
Firebase Realtime Database is a cloud-hosted NoSQL database designed to store and sync JSON data across web and mobile applications in real time. It helps teams deliver responsive experiences with live updates, offline support, and built-in synchronization across connected clients.
The service is built for applications that need low-latency data sharing and straightforward backend integration. It also supports Firebase Authentication and security rules, making it suitable for collaborative apps, chat, presence, and other event-driven use cases.
- Real-time synchronization across clients
- Offline caching and automatic resync when devices reconnect
- Mobile and web SDKs for serverless app development
- Security rules integrated with Firebase Authentication
- Multiple database instances per project on paid plans
Free Tier Value
The Realtime Database Spark free tier includes up to 100 concurrent connections, 1 GB stored, and 10 GB downloaded per month, with multiple databases per project excluded. The Blaze plan is usage-based and keeps Spark limits, with the first paid overage points shown as $5/GB stored and $1/GB downloaded; conservatively valuing the free tier at the cheapest recurring overage boundary gives about $10/month (1 GB storage + 10 GB downloads at the listed overage rates, ignoring connections because no direct per-connection price is shown). No payment method is needed for Spark, so no_cc_required is true, and the page also advertises $300 in free credit for eligible Blaze users.
What's included in the free tier
- Simultaneous connections: Up to 100 concurrent connections per database.
- Stored data: Up to 1 GB of database storage.
- Downloaded data: Up to 10 GB of downloads per month.
- Multiple databases per project: Not included in the free tier.
See Firebase Realtime Database pricing for current limits.
Paid plans
Blaze plan
- Simultaneous connections per database
- 200K
- GB stored
- No-cost up to 1 GB, then $5/GB
- GB downloaded
- No-cost up to 10 GB/month, then $1/GB
- Access more services and higher usage levels
- No-cost usage from Spark plan included
- If eligible, get $300 in free credit
Pricing extracted from Firebase Realtime Database's pricing page. Always verify current pricing before committing.
