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Head-to-head · Mobile Databases

Ditto vs Realm

  • Updated Oct 2026
  • Both researched from official sources
  • 2 checks side by side
Higher score Ditto #2 in Mobile Databases 9.2/10 Free plan Free plan✓ 1 of 1 features Visit Ditto
Realm #8 in Mobile Databases 8.3/10 Open source ✓ 0 of 1 features Explore Realm

Ditto leads on 0 checks, Realm on 0, and 2 are even. Who comes out ahead on the 2 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreDitto · 9.2/10
  • Free planonly Ditto
  • Most featuresDitto · 1 of 1

Ditto scores higher on our rubric for mobile databases: 9.2 against 8.3 out of 10; our editors rank them #2 and #8.

Ditto is the better fit for peer-to-peer and intermittently connected apps. Realm is the better fit for legacy object-oriented mobile apps with cloud sync.

  • Ditto fits best

    Peer-to-peer and intermittently connected apps

  • Realm fits best

    Legacy object-oriented mobile apps with cloud sync

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Side by side

Feature Ditto 9.2/10 Visit ↗ Realm 8.3/10 Visit ↗
At a glance
Editor score 9.2 8.3
Ranking #2 in Mobile Databases #8 in Mobile Databases
Best for Peer-to-peer and intermittently connected apps Legacy object-oriented mobile apps with cloud sync
Pricing model Free plan + paid Free
Starting price — Open source
Free plan ✓ (best) Not checked yet
Free trial — —
Deployment Cloud, Self-hosted, Desktop, Mobile Self-hosted, Mobile, Desktop
Platforms Windows, macOS, Linux, iOS, Android iOS, Android, Windows, macOS, Linux
Support Docs Community, Docs
Integrations 1 integrations 1 integrations
Features Ditto 1/1 · Realm 0/1
Offline mode ✓ (best) Not checked yet
Specs
Data synchronization Bidirectional Not checked yet
Mobile platforms iOS, Android iOS, Android, Xamarin
Conflict resolution Automatic Not checked yet
SDK languages Swift, Kotlin, JavaScript, C#, C++, Rust, Flutter, React Native Java, Objective-C, JavaScript, Swift, Xamarin
Monthly sync limit Not checked yet Not checked yet
Our review
Pros
  • Offline reads and writes with local embedded document storage
  • Peer-to-peer, mesh, and multi-hop synchronization
  • Automatic conflict resolution with broad SDK coverage
  • Local persistence with reactive, object-oriented data access
  • Device-to-cloud synchronization with MongoDB Atlas integration
  • SDK coverage across iOS, Android, Xamarin and multiple languages
Cons
  • Paid Pro and Enterprise pricing requires contacting sales
  • Free plan has only 10 cloud device connections
  • Free plan includes no SLA and limited customer support
  • Atlas Device Sync and Atlas Device SDKs reached end-of-life
  • Not suitable for new projects requiring ongoing platform support
  • Realm branding and documentation now point to legacy technology
Our verdict

Ditto is an embedded document database and edge synchronization platform for applications that need to keep operating without reliable connectivity. It is designed for mobile, desktop, web, and server environments across Windows, macOS,…

Read the review →

Realm was an open-source mobile database and synchronization technology for reactive applications. It provided local mobile data persistence, object-oriented database access, reactive application data access, and device-to-cloud…

Read the review →
  1. DittoMobile Databases 9.2Free plan
  2. RealmMobile Databases 8.3Open source

Strengths and trade-offs

  • Ditto — where it wins

    • Offline reads and writes with local embedded document storage
    • Peer-to-peer, mesh, and multi-hop synchronization
    • Automatic conflict resolution with broad SDK coverage

    Where it doesn't

    • Paid Pro and Enterprise pricing requires contacting sales
    • Free plan has only 10 cloud device connections
    • Free plan includes no SLA and limited customer support

  • Realm — where it wins

    • Local persistence with reactive, object-oriented data access
    • Device-to-cloud synchronization with MongoDB Atlas integration
    • SDK coverage across iOS, Android, Xamarin and multiple languages

    Where it doesn't

    • Atlas Device Sync and Atlas Device SDKs reached end-of-life
    • Not suitable for new projects requiring ongoing platform support
    • Realm branding and documentation now point to legacy technology
  • Ditto9.2/10 · Free plan

    A strong fit for apps that must sync across peers when connectivity is unreliable.

    Visit DittoFull verdict →
  • Realm8.3/10 · Open source

    A capable object-oriented mobile database now discontinued after Atlas Device SDK end-of-life.

    Explore RealmFull 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