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

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