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Apple CloudKit vs Firebase

Apple CloudKit: Apple's iCloud record store for apps: private per-user data, a public database and built-in sync. Firebase: Google's app platform: Firestore, Realtime Database and Data Connect, plus auth, functions and hosting.

key differences

  • Transactions: Apple CloudKit offers limited ACID; Firebase offers full.
  • Only Apple CloudKit has geospatial, change data capture, online schema changes.
  • Only Firebase has joins, vector search, json, triggers, ttl / expiry.

choose apple-cloudkit for

  • +Syncing app data across a user's iPhone, iPad and Mac
  • +Indie and Apple-only apps that want a backend without servers
  • +Collaborative documents and lists shared between iCloud users
  • +Core Data or SwiftData apps that need cloud backup and sync

best at · Mobile/offline, OLTP, Content

choose firebase for

  • +Mobile apps needing realtime sync and offline support
  • +MVPs and startups that want auth and database in one
  • +Chat, presence and collaborative features
  • +Push notifications and remote config alongside app data

best at · Mobile/offline, OLTP, Content

Apple CloudKitApple's iCloud record store for apps: private per-user data, a public database and built-in sync.
FirebaseGoogle's app platform: Firestore, Realtime Database and Data Connect, plus auth, functions and hosting.
overview
Primary model
Document
Document
Also supports
Key-Value
Relational, Vector
Type
Managed service
Backend platform
Status
Active
Active
Developer
Apple
Google
First release
2014
2012
Latest version
–
–
License
ProprietaryProprietary Apple service
ProprietaryProprietary service (client SDKs Apache-2.0)
Free tier
✓
✓
popularity
WhichDB Score
25.8
65.4
Rank
#116
#11
GitHub stars
–
5.2K
Stack Overflow questions
2.4K
143.1K
scale & guarantees
Comfortable data size
Large (≤ 1 PB)
Large (≤ 1 PB)
Horizontal scaling
Native
Native
Multi-region
None
Active active
ACID
Limited
Full
Consistency
Eventual, Strong
Strong
Schema
Flexible
Schemaless
Architecture
Serverless, Distributed
Serverless, Distributed
deployment
Self-hosted
—
—
Vendor-managed cloud
✓
✓
Serverless
✓
✓
Embedded
—
—
Edge
—
—
Clouds
–
Google Cloud
capabilities
Transactions
✓
✓
Joins
—
✓
Secondary indexes
✓
✓
Full-text search
—
—
Vector search
—
✓
Geospatial
✓
—
JSON
—
✓
Change data capture
✓
—
Triggers
—
✓
Stored procedures
—
—
Materialized views
—
—
TTL / expiry
—
✓
Pub/Sub
✓
✓
Columnar storage
—
—
In-memory
—
—
Durable persistence
✓
✓
Compression
—
—
Encryption at rest
✓
✓
Role-based access
✓
✓
Time travel
—
—
Branching
—
—
Online schema changes
✓
—
Streaming ingest
—
—
Offline sync
✓
✓
Runs in WebAssembly
—
—
interfaces
Query languages
CKQuery (NSPredicate)
Firestore query API, GraphQL (Data Connect), Security Rules language
Client languages
Swift, Objective-C, JavaScript
JavaScript, Swift, Kotlin, Java, Dart, C++, Python, Go
Best for
Mobile/offline, OLTP, Content
Mobile/offline, OLTP, Content, Vector search
Add more to this comparisonNot sure either fits? Try smart match

Apple CloudKit vs Firebase: FAQ

What is the difference between Apple CloudKit and Firebase?

Apple CloudKit: Apple's iCloud record store for apps: private per-user data, a public database and built-in sync. Firebase: Google's app platform: Firestore, Realtime Database and Data Connect, plus auth, functions and hosting. Transactions: Apple CloudKit offers limited ACID; Firebase offers full. Only Apple CloudKit has geospatial, change data capture, online schema changes. Only Firebase has joins, vector search, json, triggers, ttl / expiry.

When should I choose Apple CloudKit over Firebase?

Choose Apple CloudKit for syncing app data across a user's iPhone, iPad and Mac; indie and Apple-only apps that want a backend without servers; and collaborative documents and lists shared between iCloud users. Choose Firebase for mobile apps needing realtime sync and offline support; MVPs and startups that want auth and database in one; and chat, presence and collaborative features.

Is Apple CloudKit or Firebase more popular?

Firebase ranks #11 on the WhichDB Score (65.4/100) and Apple CloudKit ranks #116 (25.8/100). Popularity is not fit: check the requirements that matter for your project.

Are Apple CloudKit and Firebase open source?

No. Apple CloudKit is proprietary, closed-source software. No. Firebase is proprietary, closed-source software.