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Comparison

Qt vs Slint

Qt and Slint both land on Depends.

Qt

Depends

Confidence: Medium

Buy Qt if your team builds embedded, automotive, or cross-platform C++ applications . it is the mature industry standard.

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Slint

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

Qt versus Slint
Compare	Qt	Slint
Verdict	Depends	Depends
Best for	Embedded and device UI teams	Rust or C++ desktop apps
Who it's not for	Web-first or mobile-only startups . use Flutter	Web app teams . not a web framework
Privacy	Mature and actively patched, but a real CVE history exists including a 2025-2026 buffer overflow.^⁹	No known public vulnerabilities found in the sources reviewed.
Support quality	No support evidence found	No support-quality evidence in sources
Public sentiment	Developers respect the framework's depth but repeatedly and loudly complain that commercial per-developer pricing is too expensive.^¹	Rust developers call Slint a promising, lightweight declarative GUI toolkit while flagging rendering issues, async friction, and licensing confusion.
Biggest gotcha	Per-developer pricing scales brutally . forum users report $5,000+/yr per dev^³	Commercial license needed beyond royalty-free desktop terms . read the FAQ before committing

Pick Qt when

Embedded and device UI teams
Cross-platform C++ desktop apps
Automotive and industrial software
Teams needing long-term support releases

When Qt is not a fit

Web-first or mobile-only startups . use Flutter
Small teams that cannot absorb per-developer license fees
Non-C++ teams wanting a quick UI toolkit
Anyone unwilling to manage LGPL compliance obligations

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

Qt Reviews . G2g2.com
review
Qt Commercial Pricing is a Joke . Redditreddit.com
review
Why is QT so expensive? . Qt Forumforum.qt.io
review
What's your opinion of the Qt framework? . Reddit r/cppreddit.com
review
Qt Pricing . officialqt.io
official
Qt for Small Business . officialqt.io
official
$499 for small companies and startups . Hacker Newsnews.ycombinator.com
news
Qt CVE list . CVE Detailscvedetails.com
security
CVE-2025-3512 . SentinelOnesentinelone.com
security
Ubuntu 7780-1 Qt advisorylinuxsecurity.com
security
Qt response to Cisco Talos findingsqt.io
security
Alternative to Qt . Slintslint.dev
official
Companies that use Qt . TheirStacktheirstack.com
news
Qt (software) . Wikipediaen.wikipedia.org
news
Slint homepageslint.dev
official
slint-ui/slint on GitHubgithub.com
official