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ATTO Disk Benchmark vs AJA System Test: catalog facts
ATTO Disk Benchmark	AJA System Test
Free Free download from ATTO.	Free Offered as a free download from AJA's product page.
Windows	Windows, macOS
Free download from a storage hardware maker Measures both read and write performance	Results are given in video terms such as resolution and codec Shows whether a drive can sustain recording and playback
Little product detail on the vendor's pages Proprietary software	Narrow focus on storage speed for video work Product page gives few technical details
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
Not stated if an account is 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 October 1, 2026

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