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GtkStressTesting vs Prime95: catalog facts
GtkStressTesting	Prime95
Free Free and open source under the GPLv3.	Free Free to download and use under the GIMPS free software license.
Linux	Windows, macOS, Linux
Stress testing and monitoring in one graphical tool Includes benchmarking	Standard, demanding CPU and memory stress test Builds for Windows, macOS, Linux and FreeBSD
Linux only Stress tests put heavy load on hardware and should be watched	Not an OSI open source license Dated interface
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0-or-later	License: GIMPS free software license
No account needed	Not stated if an account is needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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