| Rendering engine | Chromium, embedded | None (coordinate API) | None (fluent API) | Chromium, external process | QtWebKit, ~2012 |
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| HTML & CSS support | Full HTML5/CSS3, Flexbox, Grid, JavaScript | None natively (CSS 2.1 via add-on) | No HTML parser | Full (it is Chrome) | Limited; no Flexbox or Grid |
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| License | Commercial, perpetual from $999 | MIT | Community under $1M revenue, then commercial | MIT | LGPL, repository archived |
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| Maintenance status | Active, regular releases | Active community | Active | Active | Archived July 2024 |
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| Known unpatched CVEs | None outstanding | None inherent | None inherent | None, you manage Chrome | CVE-2022-35583 (9.8), CVE-2020-21365 (7.5) |
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| Operational overhead | NuGet only | NuGet only | NuGet only | Browser process, pooling, crash recovery | Native binary management + CVEs |
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| Vendor support | 24/7, real engineers | Community only | Community only | Community only | None, abandoned |
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| Audit / vendor statement | Available on request | None | None | None | None |
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