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Iced versus Slint
Compare	Iced	Slint
Verdict	Depends	Depends
Best for	Rust developers building desktop apps	Rust or C++ desktop apps
Who it's not for	Non-Rust teams; this library only helps Rust codebases	Web app teams . not a web framework
Privacy	No known CVEs for the iced GUI library; its own security page returns 404.^²	No known public vulnerabilities found in the sources reviewed.^⁹
Support quality	No usable evidence found	No support-quality evidence in sources
Public sentiment	Public feedback is sparse: one Rust user sought an alternative and forum members list Iced among GUI options.^³	Rust developers call Slint a promising, lightweight declarative GUI toolkit while flagging rendering issues, async friction, and licensing confusion.¹³
Biggest gotcha	No published security page; returns 404, so security posture is unverified^²	Commercial license needed beyond royalty-free desktop terms . read the FAQ before committing

Pick Iced when

Rust developers building desktop apps
Teams wanting a free Elm-style GUI
Indie and hobby Rust projects

When Iced is not a fit

Non-Rust teams; this library only helps Rust codebases
Buyers wanting vendor support or SLAs
Mobile-first app teams
No-code or low-code buyers

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

Iced (official site)iced.rs
official
Product security pageiced.rs
official
Looking for Iced alternative or solution to manage ...reddit.com
review
Which GUI framwork should I chooseusers.rust-lang.org
review
CVE-2021-38188 Detail - NVD - NISTnvd.nist.gov
security
Slint homepageslint.dev
official
slint-ui/slint on GitHubgithub.com
official
Slint pricing and licensingslint.dev
official
Product security pageslint.dev
security
GitHub security overviewgithub.com
security
Font rendering issue #6365github.com
review
Async Rust discussion #4377github.com
review
Reddit: desktop app with rust + slint-uireddit.com
review
Reddit: royalty-free license explainedreddit.com
review
Reddit: GUI framework comparison vs Qtreddit.com
review
Hacker News: Slint Matures to 1.0news.ycombinator.com
news