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Prime95 vs Memtest86+: catalog facts
Prime95	Memtest86+
Free Free to download and use under the GIMPS free software license.	Free Free and open source under the GPL v2.
Windows, macOS, Linux	Windows, Linux
Standard, demanding CPU and memory stress test Builds for Windows, macOS, Linux and FreeBSD	Runs without an operating system, from BIOS or UEFI Supports 32-bit and 64-bit x86 plus LoongArch64
Not an OSI open source license Dated interface	Requires rebooting the machine to run a test No ARM support
Downloadable app	Downloadable app
Closed source	Open source
License: GIMPS free software license	License: GPL-2.0
Not stated if an account is needed	No account 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.