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Should I use Slint?

Declarative GUI toolkit for Rust, C++, JavaScript & Python - slint.dev

Depends. Buy if you're a Rust or C++ team building native desktop or embedded GUIs and want a lighter Qt alternative. Skip it if you build web apps, want no-code, or lack Rust/C++ engineers.

Confidence

Medium. Based on 20+ public sources; album-review results for the band Slint were excluded as irrelevant.

Ratings

  • Value for money
  • Ease of use
  • Feature depth
  • Support qualityNo support-quality evidence in sources
  • Security posture

Pricing

Free

Open-source

ModelNot disclosed
Monthly feesNot disclosed
HardwareNot disclosed
Free tierYes
CommercialPaid; amounts not published in sources

Best for

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

Not for

  • 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

Gotchas - check before you buy

medium

Commercial license needed beyond royalty-free desktop terms — read the FAQ before committing

medium

Font rendering can look poor; open issue since September 2024

medium

Async Rust support unclear; official discussion thread unresolved

Pros and cons

Pros

  • Open-source declarative GUI toolkit
  • Targets Rust, C++, JavaScript, and Python
  • Runs on microcontrollers and embedded boards
  • Positioned as a lighter Qt replacement
  • Royalty-free license option for proprietary desktop apps

Cons

  • Font rendering criticized as poor
  • Async Rust integration still unresolved
  • Licensing model confuses developers
  • Younger and less battle-tested than Qt

Sources & method

Analyzed 9/30/2026 - 16 sources - No known vulnerabilities found in the sources reviewed.

official x7review x5security x2news x2

Key stats

  • Value for money: 4/5

    Rating

  • Free

    Starting price

  • 16

    Sources

  • Analyzed

  • Value for money: 4/5. Open-source core; commercial license only for embedded use
  • Ease of use: 3/5. Declarative markup praised; async Rust friction reported
  • Feature depth: 4/5. Multi-language, embedded board support, active 1.x releases
  • Support quality. No support-quality evidence in sources
  • Security posture: 3/5. Published security policy; no public CVEs found
  • Yes Free tier Open-source GPL plus royalty-free desktop license
  • 1.18.1 Latest version Per crates.io and release mirrors
  • 4 Languages Rust, C++, JavaScript, Python
  • Apr 2023 1.0 shipped Hacker News launch thread

Pricing

Open-source

Free

  • GPL-licensed use
  • Royalty-free option for desktop apps

Commercial

Paid; amounts not published in sources

  • Embedded and proprietary use
  • See pricing page

Security

No known vulnerabilities found in the sources reviewed.

What users say

Rust developers call Slint a promising, lightweight declarative GUI toolkit while flagging rendering issues, async friction, and licensing confusion.

Alternatives

Compare Slint with each alternative.

  • Qt

    The heavy incumbent; mature but costlier and bulkier

    Slint vs Qt

  • Iced

    Pure-Rust Elm-style GUI; simpler mental model

    Slint vs Iced

  • egui

    Immediate-mode Rust UI; fastest to prototype

Companies that use it

  • Toradex
  • STMicroelectronics
  • Espressif
  • Witekio
  • Spyrosoft
Full analysis

Based on 20+ public sources; album-review results for the band Slint were excluded as irrelevant.

Solid open-source declarative GUI toolkit for Rust/C++ desktop and embedded UIs; wrong fit for web or no-code projects.

Methodology

Based on 20+ public sources; album-review results for the band Slint were excluded as irrelevant.

Sources

  1. Slint homepageslint.dev
    official
  2. slint-ui/slint on GitHubgithub.com
    official
  3. Slint pricing and licensingslint.dev
    official
  4. Product security pageslint.dev
    security
  5. GitHub security overviewgithub.com
    security
  6. Font rendering issue #6365github.com
    review
  7. Async Rust discussion #4377github.com
    review
  8. Reddit: desktop app with rust + slint-uireddit.com
    review
  9. Reddit: royalty-free license explainedreddit.com
    review
  10. Reddit: GUI framework comparison vs Qtreddit.com
    review
  11. Hacker News: Slint Matures to 1.0news.ycombinator.com
    news
  12. Phoronix: Slint 1.1 royalty-free licensephoronix.com
    news
  13. Slint funding and hiring blogslint.dev
    official
  14. Supported boardsslint.dev
    official
  15. Alternative to Qtslint.dev
    official
  16. crates.io registry entrycrates.io
    official

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