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Gaupol vs Jubler: catalog facts
Gaupol	Jubler
Free Free and open source.	Free Free and open source under the AGPL-3.0, funded by donations.
Linux	Windows, macOS, Linux, Command line
Supports multiple text subtitle formats Tools for translating subtitles	Supports more than 20 subtitle formats Video preview, waveform and draggable timeline
Text-based subtitles only, no image subtitles Mainly aimed at Linux desktops	Text-based subtitles only Translation mode relies on Azure Translator
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: AGPL-3.0
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.