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ATTO Disk Benchmark vs DiskSpd: catalog facts
ATTO Disk Benchmark	DiskSpd
Free Free download from ATTO.	Free Free and open source from Microsoft.
Windows	Windows, Command line
Free download from a storage hardware maker Measures both read and write performance	Built and used by Microsoft's storage engineering teams Highly configurable synthetic workloads
Little product detail on the vendor's pages Proprietary software	Command line only, with many options to learn Windows only
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: MIT
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 24, 2026

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