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Head-to-head · Cross-Platform App Development Frameworks

Compose Multiplatform vs Kotlin Multiplatform

  • Updated Oct 2026
  • Both researched from official sources
  • 2 checks side by side
Higher score Compose Multiplatform #4 in Cross-Platform App Development Frameworks 9.1/10 Free plan Free plan✓ 1 of 1 features Visit JetBrains
Kotlin Multiplatform #5 in Cross-Platform App Development Frameworks 9.0/10 Free plan Free plan✓ 1 of 1 features Visit JetBrains

Compose Multiplatform leads on 0 checks, Kotlin Multiplatform 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 scoreCompose Multiplatform · 9.1/10
  • Free planboth

Compose Multiplatform scores higher on our rubric for cross-platform app development frameworks: 9.1 against 9.0 out of 10; our editors rank them #4 and #5.

On shared code model, Kotlin Multiplatform gives you Partial where Compose Multiplatform offers High.

Compose Multiplatform is the better fit for kotlin teams sharing UI across platforms. Kotlin Multiplatform is the better fit for kotlin teams sharing logic incrementally.

  • Compose Multiplatform fits best

    Kotlin teams sharing UI across platforms

  • Kotlin Multiplatform fits best

    Kotlin teams sharing logic incrementally

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Side by side

Feature Compose Multiplatform 9.1/10 Visit ↗ Kotlin Multiplatform 9.0/10 Visit ↗
At a glance
Editor score 9.1 9.0
Ranking #4 in Cross-Platform App Development Frameworks #5 in Cross-Platform App Development Frameworks
Best for Kotlin teams sharing UI across platforms Kotlin teams sharing logic incrementally
Pricing model Free Free
Starting price Not published Not published
Free plan ✓ ✓
Free trial — —
Deployment Desktop, Mobile Self-hosted
Platforms Web, Windows, macOS, Linux, iOS, Android Web, Windows, macOS, Linux, iOS, Android
Support Community, Docs Community, Docs
Built for Solo, Small business, Mid-market, Enterprise Solo, Small business, Mid-market, Enterprise
Features Compose Multiplatform 1/1 · Kotlin Multiplatform 1/1
Native API access ✓ ✓
Specs
Target platforms Android, iOS, Windows, macOS, Linux, Web Android, iOS, desktop, web, server
App types native cross-platform applications Mobile, desktop, web, server applications; shared-logic or shared-UI apps
Languages Kotlin Kotlin
Shared code model High Partial
IDE support IntelliJ IDEA, Android Studio IntelliJ IDEA, Android Studio
Our review
Pros
  • Share declarative UI across Android, iOS, desktop, and web
  • Use native APIs and interoperate with native views
  • Adopt gradually alongside SwiftUI, Android Views, or Swing
  • Share selected code across Android, iOS, desktop, web, and server targets
  • Access platform-specific APIs and integrate modules into existing apps gradually
  • Optional Compose Multiplatform UI sharing, with IntelliJ IDEA and Android Studio support
Cons
  • Web support through Kotlin/Wasm is labeled beta
  • Desktop applications target the JVM
  • The framework is centered on Kotlin Multiplatform projects
  • Shared UI is optional, not the framework’s default focus
  • Requires Kotlin development and platform-specific work where code is not shared
  • Support channels are community and documentation
Our verdict

Compose Multiplatform is JetBrains’ open-source declarative UI framework for Kotlin Multiplatform projects. It is aimed at teams that want to share interface code across Android, iOS, desktop, and web while retaining access to native APIs.…

Read the review →

Kotlin Multiplatform is JetBrains’ open-source technology for sharing Kotlin code across Android, iOS, desktop, web, and server projects. It is aimed at teams that want to reuse selected modules or business logic while retaining…

Read the review →
  1. Compose MultiplatformCross-Platform App Development Frameworks 9.1Free plan
  2. Kotlin MultiplatformCross-Platform App Development Frameworks 9.0Free plan

Strengths and trade-offs

  • Compose Multiplatform — where it wins

    • Share declarative UI across Android, iOS, desktop, and web
    • Use native APIs and interoperate with native views
    • Adopt gradually alongside SwiftUI, Android Views, or Swing

    Where it doesn't

    • Web support through Kotlin/Wasm is labeled beta
    • Desktop applications target the JVM
    • The framework is centered on Kotlin Multiplatform projects

  • Kotlin Multiplatform — where it wins

    • Share selected code across Android, iOS, desktop, web, and server targets
    • Access platform-specific APIs and integrate modules into existing apps gradually
    • Optional Compose Multiplatform UI sharing, with IntelliJ IDEA and Android Studio support

    Where it doesn't

    • Shared UI is optional, not the framework’s default focus
    • Requires Kotlin development and platform-specific work where code is not shared
    • Support channels are community and documentation
  • Compose Multiplatform9.1/10 · Free plan

    An open-source Kotlin framework for sharing UI while keeping access to native APIs.

    Visit JetBrainsFull verdict →
  • Kotlin Multiplatform9.0/10 · Free plan

    An open-source Kotlin toolchain for selective code sharing, with optional shared UI.

    Visit JetBrainsFull verdict →

More comparisons

All Cross-Platform app development frameworks comparisons → · Full ranking →

Guides on Cross-Platform app development frameworks

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update