# Compose Multiplatform vs Qt

**Leader by vioscaleAI score:** Compose Multiplatform

| Attribute | Compose Multiplatform | Qt |
|---|---|---|
| **vioscaleAI score** | 73.7 (52% (medium)) | 42.9 (71% (medium)) |
| activity.commits_last_30d | 100 | - |
| adoption.dependent_repos | 47,093 | - |
| adoption.github_stars | 53,486 | - |
| content.faq | `[{"answer":"A declarative Kotlin UI framework developed by JetBrains that allows developers to write user interface code once and deploy it across Android, iOS, desktop (Windows, macOS, Linux), and web platforms. It is indexed under Mobile App Frameworks.","source":"https://www.jetbrains.com/lp/compose-multiplatform/","question":"What is Compose Multiplatform?","confidence":0.6},{"answer":"Compose Multiplatform is open source, so it can be self-hosted and used at no licence cost. Pricing changes often, so verify at source before relying on it.","source":"https://www.jetbrains.com/lp/compose-multiplatform/","question":"Is Compose Multiplatform free to use?","confidence":0.6},{"answer":"Compose Multiplatform supports the web, Windows, macOS, Linux, iOS and Android. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://www.jetbrains.com/lp/compose-multiplatform/","question":"What platforms does Compose Multiplatform support?","confidence":0.6},{"answer":"Yes. Compose Multiplatform can be deployed on-premise and self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://www.jetbrains.com/lp/compose-multiplatform/","question":"Can Compose Multiplatform be self-hosted?","confidence":0.6},{"answer":"We have independently confirmed GDPR for Compose Multiplatform. Certifications we do not list are ones we have not been able to verify from public sources, which is not the same as Compose Multiplatform not holding them. Always confirm compliance directly before you rely on it.","source":"https://www.jetbrains.com/company/commitment/compliance-highlights/","question":"What security certifications does Compose Multiplatform have?","confidence":0.7}]` | `[{"answer":"Qt provides libraries, APIs, and development tools that enable developers to create user interfaces and applications running across desktop computers, mobile devices, web platforms, and embedded systems from a unified codebase. It is indexed under Mobile App Frameworks.","source":"https://www.qt.io","question":"What is Qt?","confidence":0.6},{"answer":"Qt does not publish its prices. Pricing is quoted on request, across 2 plans (Extended Security Maintenance and Premium Security Maintenance), so the figure depends on your seat count and requirements. We record this as a pricing-transparency signal rather than guessing a number. Pricing changes often, so verify at source before relying on it.","source":"https://www.qt.io","question":"How much does Qt cost?","confidence":0.6},{"answer":"Qt supports the web and iOS. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://www.qt.io","question":"What platforms does Qt support?","confidence":0.6},{"answer":"Yes. Qt can be deployed cloud / SaaS, hybrid and self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://www.qt.io","question":"Can Qt be self-hosted?","confidence":0.6},{"answer":"We have confirmed 4 integrations for Qt, including Figma, Axivion, Chromium and Reynolds & Moore. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://www.qt.io","question":"What does Qt integrate with?","confidence":0.6},{"answer":"We have independently confirmed ISO 27001 for Qt. Certifications we do not list are ones we have not been able to verify from public sources, which is not the same as Qt not holding them. Always confirm compliance directly before you rely on it.","source":"https://www.qt.io/ja-jp/blog/security-advisory-cve-2026-15037-xml-injection","question":"What security certifications does Qt have?","confidence":0.7},{"answer":"Qt is available worldwide. The vendor is headquartered in Finland.","source":"https://www.qt.io","question":"Where is Qt available?","confidence":0.75}]` |
| deployment.options | `{"on_prem":true,"self_hosted":true}` | `{"cloud":true,"hybrid":true,"self_hosted":true}` |
| description.long | A declarative Kotlin UI framework developed by JetBrains that allows developers to write user interface code once and deploy it across Android, iOS, desktop (Windows, macOS, Linux), and web platforms. | A C++ framework with integrated development environment, libraries, and tools for creating applications on desktop, mobile, embedded systems, and web. Includes visual design tools, testing utilities, and quality assurance features for cross-platform development. |
| features.capabilities | `{"targets":"Android, iOS, Windows, macOS, Linux, Web","approach":"native_declarative","language":"Kotlin","hot_reload":true,"web_target":true,"native_widgets":true,"desktop_support":true,"official_ui_kit":true,"single_codebase":true,"typescript_first":false,"native_api_access":"full","native_look_and_feel":true,"mobile_target_support":true}` | `{"targets":"Embedded systems, microcontrollers, iOS, Windows, macOS, web","approach":"multiplatform","language":"C++, QML","hot_reload":true,"web_target":true,"native_widgets":true,"desktop_support":true,"official_ui_kit":true,"single_codebase":true,"typescript_first":false,"native_api_access":"full","native_look_and_feel":true,"mobile_target_support":true}` |
| integrations.count | - | 3 |
| integrations.list | - | `[{"name":"Figma"},{"name":"Axivion","native":true,"category":"code-analysis"},{"name":"Chromium","native":true,"category":"web-engine"},{"name":"Reynolds & Moore","native":false},{"name":"CMake"},{"name":"NVIDIA CUDA"}]` |
| language.primary | Kotlin | - |
| market.availability | - | `{"hqCountry":"FI","primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | `{"ios":true,"mac":true,"web":true,"linux":true,"android":true,"windows":true}` | `{"web":true}` |
| pricing | `{"type":"open_source","sourceUrl":"https://www.jetbrains.com/lp/compose-multiplatform/","retrievedAt":"2026-10-07T15:24:09.818Z"}` | `{"type":"quote","plans":[{"free":false,"name":"Extended Security Maintenance","summary":"Contact sales. Developer License required.","features":["Critical vulnerability patches","Limited to Qt libraries only","3-year availability"],"commitment":"annual","description":"Critical security patches and maintenance for supported Qt Framework releases after end-of-support","contactSales":true},{"free":false,"name":"Premium Security Maintenance","summary":"Contact sales","features":["Environment-specific patches","Patch analysis and porting","For customers with ESM","3-year maximum"],"commitment":"annual","description":"Extended security maintenance customized for specific Qt versions and platforms beyond standard ESM offering","contactSales":true}],"summary":"Contact sales. Free tier for open source development; Developer License required for commercial use.","freeTier":true,"sourceUrl":"https://www.qt.io","retrievedAt":"2026-08-16T21:35:37.793Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | open_source | freemium |
| pricing.price_level | free | low |
| pricing.transparent | yes | no |
| release.cadence_days | 8 | - |
| release.history | `[{"url":"https://github.com/JetBrains/kotlin/releases/tag/v2.4.21-RC","date":"2026-09-30T11:30:47Z","type":"prerelease","version":"v2.4.21-RC"},{"url":"https://github.com/JetBrains/kotlin/releases/tag/v2.5.0-Beta1","date":"2026-09-23T12:02:11Z","type":"prerelease","version":"v2.5.0-Beta1"},{"url":"https://github.com/JetBrains/kotlin/releases/tag/v2.4.20","date":"2026-09-07T10:31:56Z","type":"stable","version":"v2.4.20"},{"url":"https://github.com/JetBrains/kotlin/releases/tag/v2.4.20-RC3","date":"2026-09-02T09:49:47Z","type":"prerelease","version":"v2.4.20-RC3"},{"url":"https://github.com/JetBrains/kotlin/releases/tag/v2.4.20-RC2","date":"2026-08-26T10:02:56Z","type":"prerelease","version":"v2.4.20-RC2"},{"url":"https://github.com/JetBrains/kotlin/releases/tag/v2.4.20-RC","date":"2026-08-12T09:36:59Z","type":"prerelease","version":"v2.4.20-RC"},{"url":"https://github.com/JetBrains/kotlin/releases/tag/v2.4.20-Beta2","date":"2026-07-22T11:41:10Z","type":"prerelease","version":"v2.4.20-Beta2"},{"url":"https://github.com/JetBrains/kotlin/releases/tag/v2.4.10","date":"2026-07-14T10:47:27Z","type":"stable","version":"v2.4.10"},{"url":"https://github.com/JetBrains/kotlin/releases/tag/v2.4.10-RC2","date":"2026-07-07T12:46:47Z","type":"prerelease","version":"v2.4.10-RC2"},{"url":"https://github.com/JetBrains/kotlin/releases/tag/v2.4.10-RC","date":"2026-06-25T09:46:40Z","type":"prerelease","version":"v2.4.10-RC"},{"url":"https://github.com/JetBrains/kotlin/releases/tag/v2.4.20-Beta1","date":"2026-06-24T13:16:57Z","type":"prerelease","version":"v2.4.20-Beta1"},{"url":"https://github.com/JetBrains/kotlin/releases/tag/v2.4.0","date":"2026-06-03T09:31:47Z","type":"stable","version":"v2.4.0"},{"url":"https://github.com/JetBrains/kotlin/releases/tag/v2.4.0-RC2","date":"2026-05-27T12:43:02Z","type":"prerelease","version":"v2.4.0-RC2"},{"url":"https://github.com/JetBrains/kotlin/releases/tag/v2.4.0-RC","date":"2026-05-13T12:30:38Z","type":"prerelease","version":"v2.4.0-RC"},{"url":"https://github.com/JetBrains/kotlin/releases/tag/v2.4.0-Beta2","date":"2026-04-22T09:52:15Z","type":"prerelease","version":"v2.4.0-Beta2"},{"url":"https://github.com/JetBrains/kotlin/releases/tag/v2.3.21","date":"2026-04-23T10:11:51Z","type":"stable","version":"v2.3.21"},{"url":"https://github.com/JetBrains/kotlin/releases/tag/v2.3.21-RC2","date":"2026-04-16T13:59:12Z","type":"prerelease","version":"v2.3.21-RC2"},{"url":"https://github.com/JetBrains/kotlin/releases/tag/v2.3.21-RC","date":"2026-04-07T12:24:41Z","type":"prerelease","version":"v2.3.21-RC"},{"url":"https://github.com/JetBrains/kotlin/releases/tag/v2.4.0-Beta1","date":"2026-03-31T13:10:43Z","type":"prerelease","version":"v2.4.0-Beta1"},{"url":"https://github.com/JetBrains/kotlin/releases/tag/v2.3.20","date":"2026-03-16T09:37:25Z","type":"stable","version":"v2.3.20"}]` | - |
| reliability.status_page | yes | - |
| security.certifications | - | `[{"name":"ISO 27001:2022","level":"2022","status":"active","evidenceUrl":"https://www.qt.io/blog/qt-group-achieves-iso-270012022-certification-strengthening-data-security-and-privacy"}]` |
| security.disclosure_policy | yes | yes |
| security.gdpr | yes | - |
| security.iso27001 | - | yes |
| security.trust_center | https://www.jetbrains.com/company/commitment/compliance-highlights/ | https://www.qt.io/blog/qt-group-achieves-iso-270012022-certification-strengthening-data-security-and-privacy |
| security.vulnerabilities | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=maven&package_name=org.jetbrains.kotlin%3Akotlin-stdlib-jdk8&per_page=100","last_12m":0,"max_severity":null}` | - |

## Capabilities (Mobile App Frameworks)

| Capability | Compose Multiplatform | Qt |
|---|:--:|:--:|
| **Core** |  |  |
| Target platforms | Android, iOS, Windows, macOS, Linux, Web | Embedded systems, microcontrollers, iOS, Windows, macOS, web |
| Approach | Native declarative | Multiplatform shared logic |
| Primary language | Kotlin | C++, QML |
| **Rendering** |  |  |
| Renders true native UI | ✓ | ✓ |
| **DX** |  |  |
| Hot reload | ✓ | ✓ |
| TypeScript-first | ✗ | ✗ |
| **Delivery** |  |  |
| Over-the-air code push | - | - |
| **Portability** |  |  |
| Single codebase, multiple platforms | ✓ | ✓ |
| Desktop support | ✓ | ✓ |
| Builds for web | ✓ | ✓ |
| **Capability** |  |  |
| Native API access | Full native | Full native |
| **Ecosystem** |  |  |
| Bundled UI component library | ✓ | ✓ |

*Source: vioscaleAI. Generated 2026-10-16T19:14:39.398Z. "-" = undocumented, not absent.*