Head-to-head · Disk Benchmark Software
DiskSpd vs AS SSD Benchmark
DiskSpd leads on 0 checks, AS SSD Benchmark on 0, and 6 are even. Who comes out ahead on the 6 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.
Our verdict
- Highest scoreDiskSpd · 7.8/10
- Free planboth
- Most featuresDiskSpd · 5 of 5
DiskSpd scores higher on our rubric for disk benchmark software: 7.8 against 7.5 out of 10; our editors rank them #5 and #8.
DiskSpd is the better fit for free Windows low-level benchmarking. AS SSD Benchmark is the better fit for windows SSD comparison testing.
- DiskSpd fits best
Free Windows low-level benchmarking
- AS SSD Benchmark fits best
Windows SSD comparison testing
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Side by side
| Feature | DiskSpd 7.8/10 Visit ↗ | AS SSD Benchmark 7.5/10 Visit ↗ |
|---|---|---|
| At a glance | ||
| Editor score | 7.8 | 7.5 |
| Ranking | #5 in Disk Benchmark Software | #8 in Disk Benchmark Software |
| Best for | Free Windows low-level benchmarking | Windows SSD comparison testing |
| Pricing model | Free | Free |
| Starting price | Free plan | Free plan |
| Free plan | ✓ | ✓ |
| Free trial | — | — |
| Deployment | Desktop | Desktop |
| Platforms | Windows | Windows |
| Built for | Mid-market, Enterprise | Solo, Small business |
| Features DiskSpd 5/5 · AS SSD Benchmark 4/5 | ||
| Random I/O tests | ✓ | ✓ |
| Sequential tests | ✓ | ✓ |
| IOPS measurement | ✓ | ✓ |
| Latency measurement | ✓ | ✓ |
| Command-line interface | ✓ (best) | Not checked yet |
| Specs | ||
| Supported platforms | Windows | Windows |
| Our review | ||
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| Cons |
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| Our verdict | DiskSpd is Microsoft’s command-line storage load generator and performance testing tool for Windows. It is intended for technical users who need configurable benchmarks for regular files, partitions, or physical devices. Workloads can be… Read the review → |
AS SSD Benchmark is a free Windows utility for measuring solid-state drive performance. It suits buyers, builders, and technical users who need comparable results across SSDs, including NVMe models. Its test set covers sequential read and… Read the review → |
Strengths and trade-offs
DiskSpd — where it wins
- Configures random and sequential workloads in detail
- Measures IOPS, latency percentiles, and interval statistics
- Tests files, partitions, and physical devices
Where it doesn't
- Windows is the primary supported platform
- Command-line operation requires technical familiarity
- Results are focused on benchmarking rather than visual reporting
AS SSD Benchmark — where it wins
- Tests sequential, random 4K, and 4K-64-thread performance
- Combines access time, compression, copy, scoring, and IOPS results
- Supports NVMe SSD testing and practical ISO, program, and game file copies
Where it doesn't
- Windows-only platform support
- No verified CLI support
- Published download page lists a 2017 release
- DiskSpd7.8/10 · Free plan
A free, open-source Windows tool for configurable low-level disk benchmarks.
Visit DiskSpdFull verdict → - AS SSD Benchmark7.5/10 · Free plan
A focused, free Windows utility for comparing SSD speed, latency, scoring, and IOPS.
Try AS SSD BenchmarkFull verdict →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Last updated · How we research and update