Sioyek vs SumatraPDF
Comparing two open source alternatives to Adobe Acrobat and Foxit Reader and Nitro PDF. Use the comparison below to decide which one fits your needs.
Sioyek
GPL-3.0Cross-platform PDF viewer focused on textbooks and research papers with smart navigation, marks, bookmarks, and bibliography jumping.
SumatraPDF
GPL-3.0Lightweight, free PDF, eBook, and comic reader for Windows that launches instantly and stays out of the way; multi-format support with minimal interface.
Side-by-side comparison
| Sioyek | SumatraPDF | |
|---|---|---|
| License | GPL-3.0 | GPL-3.0 |
| Self-hostable | No | No |
| GitHub Stars | 9,902 | 17,676 |
| Forks | 382 | 2,046 |
| Open Issues | 338 | 68 |
| Last Commit | Sep 24, 2026 | Sep 29, 2026 |
| First Released | Jul 11, 2021 | Oct 2, 2012 |
| Categories | ||
| Tags |
GitHub stars over time
GitHub stars over time
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