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Head-to-head · Disk Benchmark Software

fio vs AS SSD Benchmark

  • Updated Oct 2026
  • Both researched from official sources
  • 6 checks side by side
Higher score fio #2 in Disk Benchmark Software 8.8/10 Free plan Free plan✓ 5 of 5 features Visit fio
AS SSD Benchmark #8 in Disk Benchmark Software 7.5/10 Free plan Free plan✓ 4 of 5 features Try AS SSD Benchmark

fio 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 scorefio · 8.8/10
  • Free planboth
  • Most featuresfio · 5 of 5

fio scores higher on our rubric for disk benchmark software: 8.8 against 7.5 out of 10; our editors rank them #2 and #8.

fio is the better fit for broad, rigorous cross-platform benchmarking. AS SSD Benchmark is the better fit for windows SSD comparison testing.

  • fio fits best

    Broad, rigorous cross-platform benchmarking

  • AS SSD Benchmark fits best

    Windows SSD comparison testing

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Side by side

Feature fio 8.8/10 Visit ↗ AS SSD Benchmark 7.5/10 Visit ↗
At a glance
Editor score 8.8 7.5
Ranking #2 in Disk Benchmark Software #8 in Disk Benchmark Software
Best for Broad, rigorous cross-platform benchmarking Windows SSD comparison testing
Pricing model Free Free
Starting price Free plan Free plan
Free plan ✓ ✓
Free trial — —
Deployment Self-hosted Desktop
Platforms Linux, Windows, macOS Windows
Built for Solo, Small business, Mid-market, Enterprise Solo, Small business
Features fio 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 Linux, Solaris, AIX, HP-UX, OSX, NetBSD, OpenBSD, Windows, FreeBSD, DragonFly Windows
Our review
Pros
  • Covers sequential, random, mixed, IOPS, bandwidth, and latency workloads
  • Runs on Linux, Windows, macOS, and several Unix-like systems
  • Exports normal, terse, JSON, and JSON+ result formats
  • 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
Cons
  • Command-line and job-file workflows require technical familiarity
  • Results and workload behavior depend on configuration choices
  • Focused on engineering measurement rather than guided visual analysis
  • Windows-only platform support
  • No verified CLI support
  • Published download page lists a 2017 release
Our verdict

fio is an open-source I/O tester for measuring storage and filesystem performance. It is intended for engineers and administrators who need configurable benchmarks across Linux, Windows, macOS, and several Unix-like operating systems.…

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 →
  1. fioDisk Benchmark Software 8.8Free plan
  2. AS SSD BenchmarkDisk Benchmark Software 7.5Free plan

Strengths and trade-offs

  • fio — where it wins

    • Covers sequential, random, mixed, IOPS, bandwidth, and latency workloads
    • Runs on Linux, Windows, macOS, and several Unix-like systems
    • Exports normal, terse, JSON, and JSON+ result formats

    Where it doesn't

    • Command-line and job-file workflows require technical familiarity
    • Results and workload behavior depend on configuration choices
    • Focused on engineering measurement rather than guided visual analysis

  • 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

More comparisons

All disk benchmark software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update