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Internet Download Accelerator vs AB Download Manager: catalog facts
Internet Download Accelerator	AB Download Manager
Freemium Free edition available, with a paid Pro version.	Free Free and open source, supported by donations.
Windows	Windows, macOS, Linux, Browser extension
Segmented downloads over HTTP, HTTPS and FTP Resumes broken downloads	Multi-connection downloads Queues with a built-in scheduler
Windows only Some features reserved for the paid Pro edition	Community support mainly through Telegram and GitHub Younger project than long-established download managers
Downloadable app	Downloadable app, Browser extension
Closed source	Open source
License not stated	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 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.