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OCCT vs Prime95: catalog facts
OCCT	Prime95
Freemium Free for individuals, with offerings for professional and business use.	Free Free to download and use under the GIMPS free software license.
Windows, Linux	Windows, macOS, Linux
Stress testing, benchmarking and monitoring in one tool Free for individual users	Standard, demanding CPU and memory stress test Builds for Windows, macOS, Linux and FreeBSD
Closed source Professional use is a separate offering	Not an OSI open source license Dated interface
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License: GIMPS free software license
Not stated if an account is needed	Not stated if an account is needed
Not stated if it 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.