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VERDICT

Should I use Qt?

Tools for each stage of the software development lifecycle - qt.io

Depends. Buy Qt if your team builds embedded, automotive, or cross-platform C++ applications — it is the mature industry standard. Skip it for web-first or simple apps; per-developer commercial pricing and free rivals like Flutter make it the wrong weight class.

Confidence

Medium. Based on ~25 public sources; unrelated 'QT' results (QuikTrip gas stations, QT Funded prop firm) excluded.

Ratings

  • Value for money
  • Ease of useNo clear user evidence either way
  • Feature depth
  • Support qualityNo support evidence found
  • Security posture

Pricing

Free

Open Source

ModelNot disclosed
Monthly feesNot disclosed
HardwareNot disclosed
Free tierYes
Qt for Small Business$499/yr
Commercial / Device Creation~$5,000+/yr per dev

Best for

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

Not for

  • 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

Gotchas - check before you buy

high

Per-developer pricing scales brutally — forum users report $5,000+/yr per dev

medium

Free LGPL version carries compliance obligations for commercial software

medium

Modules once in the open-source version have shifted behind paywalls

low

Research is noisy: QuikTrip gas stations and QT Funded prop firm dominate search results

Pros and cons

Pros

  • Mature framework with long-term support releases
  • Free open-source option under LGPL license
  • Affordable $499/yr license exists for small companies and startups
  • Large install base — over 15,600 companies use it
  • Full toolchain: framework, design tools, and Squish GUI testing

Cons

  • Commercial licenses cost thousands per developer per year
  • Users openly call commercial pricing a joke
  • Previously free modules like Qt Charts moved behind paid licenses
  • LGPL compliance adds legal complexity for commercial software
  • Alternatives like Slint and Flutter are winning some teams over

Sources & method

Analyzed 9/30/2026 - 14 sources - Mature and actively patched, but a real CVE history exists including a 2025-2026 buffer overflow.

official x3review x4security x4news x3
  • CVE-2025-3512, Buffer overflow vulnerability in Qt Framework disclosed in the SentinelOne vulnerability database.
  • Ubuntu USN-7780-1, Critical Qt advisory covering denial-of-service and memory leak flaws.
  • Cisco Talos disclosures (2022), Talos reported Qt vulnerabilities; Qt published a public response and fixes.

Key stats

  • Value for money: 2/5

    Rating

  • Free

    Starting price

  • 14

    Sources

  • Analyzed

  • Value for money: 2/5. Per-dev fees widely called a joke by users
  • Ease of use. No clear user evidence either way
  • Feature depth: 4/5. Full framework plus design and GUI testing tools
  • Support quality. No support evidence found
  • Security posture: 3/5. Real CVE history, but actively patched and documented
  • $499/yr Starting price Small-business license for startups
  • ~$5,000+/yr Commercial cost Per developer, per user reports
  • Yes Free tier Open-source option under LGPL
  • 15,601 Companies using Qt Per TheirStack firmographics

Pricing

Open Source

Free

  • LGPL-licensed frameworks
  • Community support only
  • Compliance obligations apply

Qt for Small Business

$499/yr

  • Per-developer license
  • For small companies and startups

Commercial / Device Creation

~$5,000+/yr per dev

  • Professional and enterprise tiers
  • Enterprise contracts are quote-based

Security

Mature and actively patched, but a real CVE history exists including a 2025-2026 buffer overflow.

  • CVE-2025-3512Buffer overflow vulnerability in Qt Framework disclosed in the SentinelOne vulnerability database.⁹
  • Ubuntu USN-7780-1Critical Qt advisory covering denial-of-service and memory leak flaws.10
  • Cisco Talos disclosures (2022)Talos reported Qt vulnerabilities; Qt published a public response and fixes.11

What users say

Developers respect the framework's depth but repeatedly and loudly complain that commercial per-developer pricing is too expensive.

“Qt Commercial Pricing is a Joke”
Reddit, r/QtFramework
“Qt is great and I get disappointed”
Hacker News
“Why is QT so expensive? 5000+ dollar a year”
Qt Forum
Full analysis

Based on ~25 public sources; unrelated 'QT' results (QuikTrip gas stations, QT Funded prop firm) excluded.

Powerful cross-platform C++ framework, standard for embedded — but commercial per-dev pricing stings. Free LGPL tier exists.

Methodology

Based on ~25 public sources; unrelated 'QT' results (QuikTrip gas stations, QT Funded prop firm) excluded.

Sources

  1. Qt Reviews — G2g2.com
    review
  2. Qt Commercial Pricing is a Joke — Redditreddit.com
    review
  3. Why is QT so expensive? — Qt Forumforum.qt.io
    review
  4. What's your opinion of the Qt framework? — Reddit r/cppreddit.com
    review
  5. Qt Pricing — officialqt.io
    official
  6. Qt for Small Business — officialqt.io
    official
  7. $499 for small companies and startups — Hacker Newsnews.ycombinator.com
    news
  8. Qt CVE list — CVE Detailscvedetails.com
    security
  9. CVE-2025-3512 — SentinelOnesentinelone.com
    security
  10. Ubuntu 7780-1 Qt advisorylinuxsecurity.com
    security
  11. Qt response to Cisco Talos findingsqt.io
    security
  12. Alternative to Qt — Slintslint.dev
    official
  13. Companies that use Qt — TheirStacktheirstack.com
    news
  14. Qt (software) — Wikipediaen.wikipedia.org
    news

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