Cloud, Backup & PC·Standings

Compare PC Stress Testing Tools

PC stress testing tools put a computer under sustained load to help check how it handles demanding work. The choice depends on which operating system you need and whether you want a free plan or a paid tool.

Use the signal score out of 10 as one comparison point, then check the marks for a public API, open-source code and a free tier. Platform listings include Windows, Linux, macOS, self-hosted, Android and iOS; check an individual tool's listing for its supported platforms.

38 platforms
23 with a free tier
Checked 24 Oct 2026

#PlatformSignalPlugs inPrice
1
M
MemTest86memtest86.com
A RAM test that boots from USB and has free and paid plans for several systems.

6.6 APIOpenFree Free tier · from $76/yr
2
F
fiogithub.com
A free storage workload tool for measuring read, write, and mixed-workload performance.

6.6 APIOpenFree Free tier
3
N
Novabenchnovabench.com
A free benchmark for CPU, GPU, RAM, and disk on Windows, macOS, and Linux.

6.6 APIOpenFree Free tier · from $36/yr
4
HM
HCI MemTesthcidesign.com
A memory reliability checker for Windows, with free and paid versions.

6.4 APIOpenFree Free tier · $5 one-time
5
3
3DMarkbenchmarks.ul.com
A graphics and processor benchmark with free plans, custom profiles, and device comparisons.

6.4 APIOpenFree Free tier
6
YC
y-crunchernumberworld.org
A free multi-threaded benchmark and stress tool that computes Pi and other constants.

6.4 APIOpenFree Free tier
7
P
Prime95mersenne.org
A free CPU and cache stress tool that also searches for Mersenne primes.

6.3 APIOpenFree Free tier
8
SN
stress-nggithub.com
A free tool with hundreds of stress tests for CPU, memory, filesystems, and more.

6.3 APIOpenFree Free tier
9
A
Autorunslearn.microsoft.com
Autoruns shows programs and drivers configured to run during system boot, login, and when certain built-in Windows applications start.

6.0 APIOpenFree Free tier
10
IV
Intel VTune Profilerintel.com
A free performance analyzer for applications and systems on Windows and Linux.

6.0 APIOpenFree Free tier
11
O
OCCTocbase.com
A PC tool for stress tests, benchmarks, and monitoring, with a free plan and Linux and Windows support.

6.0 APIOpenFree Free tier
12
A
AIDA64aida64.com
A paid utility that identifies PC components and checks system performance, with a 30-day trial.

5.9 APIOpenFree €59.95 one-time
13
UH
UNIGINE Heaven Benchmarkbenchmark.unigine.com
A GPU performance and stability benchmark with free and paid plans for three systems.

5.9 APIOpenFree Free tier · from $14.95/mo (lower tiers unpriced)
14
F
FurMarkfurmark.app
A free Windows graphics benchmark and stress tool with OpenGL and Vulkan options.

5.8 APIOpenFree Free tier
15
US
UNIGINE Superposition Benchmarkbenchmark.unigine.com
A GPU benchmark and stress tool with free and paid plans for Windows and Linux.

5.7 APIOpenFree Free tier · from $19.95/mo (lower tiers unpriced)
16
T
ThermalStatsthermalstats.com
A free tool for Linux, web, and Windows.

5.1 APIOpenFree Free tier
17
GM
GPU Magickgpumagick.com
A free tool for Linux, macOS, and Windows PCs.

5.1 APIOpenFree Free tier
18
SN
stress-ngcolinianking.github.io
A free system stress testing tool for Android, Linux, and macOS.

5.1 APIOpenFree Free tier
19
KR
Karhu RAM Testkarhusoftware.com
A paid Windows memory tool that runs from a USB drive and supports up to 8 TB of RAM.

4.9 APIOpenFree —
20
C
clgpustressgithub.com
A free tool for Windows and Linux PCs.

4.9 APIOpenFree Free tier
21
GB
gpu-burngithub.com
A free tool for Windows and Linux PCs.

4.9 APIOpenFree Free tier
22
LX
Linpack Xtremetechpowerup.com
A free stress testing tool for Linux and Windows.

4.9 APIOpenFree Free tier
23
NG
NVIDIA GPU Stress Testgithub.com
A free NVIDIA GPU stress test for Linux and Windows.

4.9 APIOpenFree Free tier
24
C
ClawHammergithub.com
A free tool for Windows PCs.

4.8 APIOpenFree Free tier
25
C
CoreCyclergithub.com
A free tool for Windows PCs.

4.8 APIOpenFree Free tier

Places #1, #2, #3, #4, #5 on this board are open to sponsors. Take #1 · Other ways to advertise

How to choose

Which platforms does it need to run on?

Start with the operating system you plan to use. The board includes listings for Windows, Linux, macOS, self-hosted, Android and iOS, but support varies by tool.

Confirm the platform on the individual listing before choosing; a category-level platform list does not mean a particular tool runs everywhere.

Can I use a free PC stress testing tool?

Check the free-plan mark and pricing note. A free plan, a free trial and a paid product are different options.

For example, 3DMark is listed with a free plan, while AIDA64 is listed as paid with a 30-day trial and a starting price of $65.95.

Do I need an API or open-source code?

If the tool needs to connect to another service, check its public API mark. An API is a way for software to exchange information.

If you need to read or change the software's code, check its open-source mark and licence. Do not assume that a free plan means the code is open source.

Questions

What does a PC stress testing tool do?

It puts a computer under sustained load to help check how it handles demanding work.

Which operating systems do PC stress testing tools support?

Listings cover Windows, Linux, macOS, self-hosted, Android and iOS. Check the individual tool's listing for its supported platforms.

Are there free PC stress testing tools?

Yes. Check the free-plan mark and pricing note for the tool you are considering; some paid tools may instead offer a trial.

Is a free PC stress testing tool open source?

Not necessarily. A free plan and open-source code are separate things; check the open-source mark and licence.

What does the signal score out of 10 mean?

It combines published signals including use, a public API, documentation depth, open-source code and a free tier. It is not a stress-test result.

Some top positions on this board can be paid placements, standing where they were sold. The facts on each platform are not for sale. How we rank · Disclosure