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AS SSD Benchmark vs CrystalDiskMark: catalog facts
AS SSD Benchmark	CrystalDiskMark
Free Free to use.	Free Freeware. The developer asks for optional donations to support development.
Windows	Windows
Fast, straightforward benchmark focused specifically on SSD performance No installation required to run a quick test	Sequential and random read, write and mixed measurements in a few clicks Peak, real-world and demo modes covering different queue depths and thread counts
Windows only Narrower feature set than more full-featured storage benchmarking suites	Windows only Synthetic benchmarks do not always reflect how a drive feels in use
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: MIT
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 21, 2026

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