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ATTO Disk Benchmark vs KDiskMark: catalog facts
ATTO Disk Benchmark	KDiskMark
Free Free download from ATTO.	Free Free and open source.
Windows	Linux
Free download from a storage hardware maker Measures both read and write performance	Simple interface over the fio benchmark engine Configurable block size, queues and threads
Little product detail on the vendor's pages Proprietary software	Linux only Relies on fio being installed
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License not stated
Not stated if an account is 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.