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Head-to-head · Mobile Databases

Firestore vs ObjectBox

  • Updated Oct 2026
  • Both researched from official sources
  • 1 check side by side
Higher score Firestore #4 in Mobile Databases 8.9/10 Free plan Free plan✓ 0 of 1 features Visit Firestore
ObjectBox #7 in Mobile Databases 8.5/10 Free plan Free plan✓ 0 of 1 features Visit ObjectBox

Firestore leads on 0 checks, ObjectBox on 0, and 1 is even. Who comes out ahead on the 1 yes/no, price and count check where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreFirestore · 8.9/10
  • Free planboth

Firestore scores higher on our rubric for mobile databases: 8.9 against 8.5 out of 10; our editors rank them #4 and #7.

Firestore is the better fit for cloud-backed document applications. ObjectBox is the better fit for cross-platform apps needing local sync and vectors.

  • Firestore fits best

    Cloud-backed document applications

  • ObjectBox fits best

    Cross-platform apps needing local sync and vectors

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Side by side

Feature Firestore 8.9/10 Visit ↗ ObjectBox 8.5/10 Visit ↗
At a glance
Editor score 8.9 8.5
Ranking #4 in Mobile Databases #7 in Mobile Databases
Best for Cloud-backed document applications Cross-platform apps needing local sync and vectors
Pricing model Free plan + paid Free plan + paid
Starting price — Free plan
Free plan ✓ ✓
Free trial — —
Deployment Cloud Cloud, Self-hosted, Desktop, Mobile
Platforms Web, iOS, Android Windows, macOS, Linux, iOS, Android
Support Community, Docs Email, Community, Docs
Integrations 3 integrations 1 integrations
Built for Small business, Mid-market, Enterprise Small business, Mid-market, Enterprise
Features Firestore 0/1 · ObjectBox 0/1
Offline mode Not checked yet Not checked yet
Specs
Data synchronization Not checked yet Not checked yet
Mobile platforms Not checked yet Not checked yet
Conflict resolution Not checked yet Not checked yet
SDK languages Not checked yet Not checked yet
Monthly sync limit Not checked yet Not checked yet
Our review
Pros
  • Offline persistence and real-time updates across mobile and web SDKs
  • Security Rules integrate with Firebase Authentication
  • Supports transactions, vector search, REST, and multiple access modes
  • Offline-first persistence with bidirectional synchronization
  • On-device vector search alongside reactive queries and transactions
  • Native APIs across mobile, desktop, and server environments
Cons
  • Usage-based billing varies by operations, storage, and network usage
  • Cloud deployment does not provide a self-hosted deployment model
  • Available access modes vary by the selected edition
  • ObjectBox Sync is priced by project and usage
  • The default C/C++ database limit is 1 GB
  • Its integration list includes MongoDB rather than a broad ecosystem
Our verdict

Firestore is a managed, schemaless document database for mobile, web, and server applications. Its JSON-like collections and documents support nested maps, arrays, timestamps, binary data, geographic points, and vectors. The product is…

Read the review →

ObjectBox is an embedded, object-oriented database for mobile, IoT, edge, desktop, and server applications. It is designed for applications that need local data persistence, offline-first operation, and optional synchronization across…

Read the review →
  1. FirestoreMobile Databases 8.9Free plan
  2. ObjectBoxMobile Databases 8.5Free plan

Strengths and trade-offs

  • Firestore — where it wins

    • Offline persistence and real-time updates across mobile and web SDKs
    • Security Rules integrate with Firebase Authentication
    • Supports transactions, vector search, REST, and multiple access modes

    Where it doesn't

    • Usage-based billing varies by operations, storage, and network usage
    • Cloud deployment does not provide a self-hosted deployment model
    • Available access modes vary by the selected edition

  • ObjectBox — where it wins

    • Offline-first persistence with bidirectional synchronization
    • On-device vector search alongside reactive queries and transactions
    • Native APIs across mobile, desktop, and server environments

    Where it doesn't

    • ObjectBox Sync is priced by project and usage
    • The default C/C++ database limit is 1 GB
    • Its integration list includes MongoDB rather than a broad ecosystem
  • Firestore8.9/10 · Free plan

    A cloud-managed document database with offline persistence, real-time updates, and vector search.

    Visit FirestoreFull verdict →
  • ObjectBox8.5/10 · Free plan

    A flexible local-first database for cross-platform apps that need sync and on-device vectors.

    Visit ObjectBoxFull verdict →

More comparisons

All mobile databases comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update