CrystalDiskMark

System · Disks

Windows

Open source disk benchmark that measures sequential and random read and write speeds of storage devices. It is MIT licensed and fully functional with no paid tier.

Get it

Download from the developer

The promise

✓ No ads
✓ No purchases
✓ No subscriptions
✓ No trials
✓ No nagging
✓ No surprise bundles

Transparency

✓ Open source

Something wrong?

Reports go to a human review queue. No timeline promised — this is a small pilot, but every report gets read.