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HTTP Downloader vs Internet Download Accelerator: catalog facts
HTTP Downloader	Internet Download Accelerator
Free Free and open source.	Freemium Free edition available, with a paid Pro version.
Windows, Browser extension	Windows
Lightweight native Windows program Browser extensions for Chrome and Firefox	Segmented downloads over HTTP, HTTPS and FTP Resumes broken downloads
Windows only Handles HTTP and HTTPS downloads only	Windows only Some features reserved for the paid Pro edition
Downloadable app, Browser extension	Downloadable app
Open source	Closed source
License: GPL-3.0	License not stated
No account needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 23, 2026

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