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KDiskMark vs ATTO Disk Benchmark: catalog facts
KDiskMark	ATTO Disk Benchmark
Free Free and open source.	Free Free download from ATTO.
Linux	Windows
Simple interface over the fio benchmark engine Configurable block size, queues and threads	Free download from a storage hardware maker Measures both read and write performance
Linux only Relies on fio being installed	Little product detail on the vendor's pages Proprietary software
Downloadable app	Downloadable app
Open source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is 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.