The best open source alternative to UserBenchMark is CrystalDiskMark. If that doesn't suit you, our users have ranked more than 50 alternatives to UserBenchMark and ten of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to UserBenchMark are MangoHUD, Phoronix Test Suite, Cross Platform Disk Test and fio.
Versatile benchmarking utility to assess drive performance, offering rapid sequential/random speed tests, easy-to-read results, multilingual support, and more, all in a free package.
Userbenchmark is for your entire system, as well as comparing existing benchmark data for various different system components.
A Vulkan and OpenGL overlay for monitoring FPS, temperatures, CPU/GPU load and more. Discord: https://discordapp.com/invite/Gj5YmBb - flightlessmango/MangoHud
The Phoronix Test Suite carry out automated tests. It is open source. It has access to more than 450 test profiles and over 100 test suites. These tests range from battery power consumption monitoring for mobile devices to multi-threaded ray-tracing benchmarks and span the CPU...
Measuring storage performance (SSD, HDD, USB Flash etc.) and RAM speed across Windows, macOS, Linux and Android devices. Random and sequential throughput (read/write operations) is calculted in MB/s and can be compared in consistent and reliable manner between mobile and desktop...
fio is an I/O tool meant for both for benchmark and stress/hardware verification. It has support for many different types of I/O engines, I/O priorities (on newer Linux kernels), rate limited I/O, forked or threaded jobs and much more.
GST is a GTK system utility designed to stress and monitor various hardware components like CPU and RAM.
DiskMark is a small utility that allows you to benchmark your disks and hard drives performance.
As the Iometer Users Guide says, Iometer is an I/O subsystem measurement and characterization tool for single and clustered systems. It was originally developed by the Intel Corporation and announced at the Intel Developers Forum (IDF) on February 17, 1998 - since then it got...
5 Second Benchmark, or 5SBM, is a free and open source web-based CPU benchmark tool for quickly estimating a device's approximate relative CPU power. Its quick testing process and short URL make it easy to run on a large number of devices in a short period of time without...
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CrystalDiskMark only tests drives, while UserBenchmark tests the whole system.