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Memtest86+OCCT
Free

Free and open source under the GPL v2.

 Freemium

Free for individuals, with offerings for professional and business use.

Windows, Linux Windows, Linux
  • Runs without an operating system, from BIOS or UEFI
  • Supports 32-bit and 64-bit x86 plus LoongArch64
  • Stress testing, benchmarking and monitoring in one tool
  • Free for individual users
  • Requires rebooting the machine to run a test
  • No ARM support
  • Closed source
  • Professional use is a separate offering
Downloadable app Downloadable app
Open source Closed source
License: GPL-2.0 License not stated
No account needed Not stated if an account is needed
Works offline Not stated if it works offline

Checked October 1, 2026

Checked September 23, 2026

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