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Flutter vs Slint

Flutter and Slint both land on Depends.

Flutter

flutter.dev

Depends
Confidence: Medium

Use Flutter if you have (or will hire) developers and want one free codebase for iOS, Android, web and desktop.

Read the full report

Slint

slint.dev

Depends
Confidence: Medium

Buy if you're a Rust or C++ team building native desktop or embedded GUIs and want a lighter Qt alternative.

Read the full report

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Flutter versus Slint
CompareFlutterSlint
VerdictDependsDepends
Best forStartups shipping one app to iOS and AndroidRust or C++ desktop apps
Who it's not forNon-coders wanting an app . learn a no-code tool insteadWeb app teams . not a web framework
PrivacyOne patched SDK path-traversal flaw (CVE-2026-27704, patched Feb 2026); no open critical issues found in sources reviewed.⁸No known public vulnerabilities found in the sources reviewed.14
Support qualityNo support-quality evidence in sourcesNo support-quality evidence in sources
Public sentimentReviews are largely positive . users praise the single-codebase workflow . but long-term Reddit threads flag scaling and ecosystem gripes.⁵Rust developers call Slint a promising, lightweight declarative GUI toolkit while flagging rendering issues, async friction, and licensing confusion.
Biggest gotchaFree SDK, expensive app: even simple Flutter apps carry real development price tagsCommercial license needed beyond royalty-free desktop terms . read the FAQ before committing

Pick Flutter when

  • Startups shipping one app to iOS and Android
  • Teams with design-heavy custom UIs
  • Budget-conscious MVPs with in-house devs
  • Dart-comfortable engineering teams

When Flutter is not a fit

  • Non-coders wanting an app . learn a no-code tool instead
  • Simple one-screen apps . templates are cheaper than a framework
  • Teams needing deep native Swift/Kotlin features
  • Web-first products . Flutter web support is contested

Pick Slint when

  • Rust or C++ desktop apps
  • Embedded UIs on microcontrollers
  • Teams migrating off Qt
  • Cross-platform native UIs

When Slint is not a fit

  • Web app teams . not a web framework
  • Teams without Rust or C++ skills
  • No-code or low-code UI builders
  • Anyone needing Qt's decades-proven ecosystem

Sources

  1. Flutter . official siteflutter.dev
    official
  2. Flutter security overviewdocs.flutter.dev
    official
  3. Flutter Pros and Cons: Why Choose Flutter in 2025?leancode.co
    review
  4. Flutter Reviews . G2g2.com
    review
  5. Flutter - long term review (Reddit)reddit.com
    review
  6. Unpopular opinion: Flutter UIs feel great until you scale (Reddit)reddit.com
    review
  7. Flutter vs React Native . GitHub discussiongithub.com
    review
  8. CVE-2026-27704 . NVDnvd.nist.gov
    security
  9. CVE-2026-27704 . SentinelOnesentinelone.com
    security
  10. From Flutter to SwiftUI . migration case studysebastianroehl.substack.com
    review
  11. Slint homepageslint.dev
    official
  12. slint-ui/slint on GitHubgithub.com
    official
  13. Slint pricing and licensingslint.dev
    official
  14. Product security pageslint.dev
    security
  15. GitHub security overviewgithub.com
    security
  16. Font rendering issue #6365github.com
    review