AWS S3 vs Azure Blob StorageStorage Benchmark Comparison
Azure Blob Storage was faster in 1 of 2 storage measurements with a speed verdict, and 1 was roughly even.
- Shared storage measurements
- 3
- With a speed verdict
- 2
- Last run
- October 30, 2026
Scorecard
Median of each storage measurement's primary metric; lower is better. Medians within 5% count as roughly even, and a storage measurement gets no speed verdict when either provider completed fewer than 50% of runs.
| Benchmark | AWS S3 | Azure Blob Storage | Result | Ratio |
|---|---|---|---|---|
| Upload (10 MB) Upload time · Run October 30, 2026 | 490ms 100% success | 141ms 100% success | Azure Blob Storage faster | 3.48x |
| Download (10 MB) Download time · Run October 30, 2026 | 137ms 100% success | 136ms 100% success | Roughly even | 1.01x |
| Snapshot create Snapshot create time · Run October 30, 2026 | No timing data 0% success | 1.93s 98% success | No verdict No speed verdict because AWS S3 completed 0% of runs, fewer than the 50% required. | — |
Upload (10 MB)
Run October 30, 2026Time to upload a 10 MB file to the provider, measured in the 10 MB storage lifecycle benchmark.
Upload time
Azure Blob Storage
100% successAzure Blob Storage had a 3.48x lower median upload time (141ms vs 490ms for AWS S3).
Median upload time over time
31 runs from June 28, 2026 to October 30, 2026.
Download (10 MB)
Run October 30, 2026Time to download the same 10 MB file back, measured in the 10 MB storage lifecycle benchmark.
Download time
Azure Blob Storage
100% successThe medians are within 5% of each other (137ms vs 136ms), so this counts as roughly even.
Median download time over time
31 runs from June 28, 2026 to October 30, 2026.
Snapshot create
Run October 30, 2026Time to create a snapshot of a bucket holding a small dataset of 10 objects.
Snapshot create time
Azure Blob Storage
98% successNo speed verdict because AWS S3 completed 0% of runs, fewer than the 50% required.
Median snapshot create time over time
15 runs from June 30, 2026 to July 17, 2026.
Methodology
- One workload, every provider. The same script, payload, and model hit every provider, addressed the way its own API expects. Nobody gets a tuned or special path.
- Repeated on a schedule. Every suite runs many iterations per provider, automated on a recurring schedule, so results reflect steady state rather than one lucky request.
- Raw results published. Every run is committed as JSON to the public benchmarks repo, next to the code that produced it. Nothing is cherry-picked or held back.
- How this comparison is built. Each benchmark compares the two providers' medians; results within 5% count as roughly even. A comparison is published only when both providers completed the 10 MB storage lifecycle benchmark reliably: at least 50% success for each provider, in benchmark runs from the last 30 days.
Frequently asked questions
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Azure Blob Storage was faster in 1 of 2 storage measurements with a speed verdict, and 1 was roughly even. In Upload (10 MB) (October 30, 2026), Azure Blob Storage had a median upload time of 141ms versus 490ms for AWS S3, 3.48x faster. In Download (10 MB) (October 30, 2026), AWS S3 had a median download time of 137ms and Azure Blob Storage 136ms, which counts as roughly even.