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OCCT vs AIDA64 Extreme: catalog facts
OCCT	AIDA64 Extreme
Freemium Free for individuals, with offerings for professional and business use.	Paid A paid licence is required after the trial.
Windows, Linux	Windows
Stress testing, benchmarking and monitoring in one tool Free for individual users	Extremely detailed hardware and software inventory with exportable reports Sensor readings can be sent to an external display or a remote client
Closed source Professional use is a separate offering	Paid licence with a time-limited trial Windows only
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
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 22, 2026

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