AWS S3 vs MosaicStorage Benchmark Comparison
AWS S3 was faster in both storage measurements with a speed verdict.
- 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 | Mosaic | Result | Ratio |
|---|---|---|---|---|
| Upload (10 MB) Upload time · Run October 30, 2026 | 490ms 100% success | 1154ms 100% success | AWS S3 faster | 2.35x |
| Download (10 MB) Download time · Run October 30, 2026 | 137ms 100% success | 323ms 100% success | AWS S3 faster | 2.35x |
| Snapshot create Snapshot create time · Run October 30, 2026 | No timing data 0% success | No timing data 0% success | No verdict No speed verdict because AWS S3 completed 0% of runs and Mosaic 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
AWS S3 had a 2.35x lower median upload time (490ms vs 1154ms for Mosaic).
Median upload time over time
11 runs from August 21, 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
AWS S3 had a 2.35x lower median download time (137ms vs 323ms for Mosaic).
Median download time over time
11 runs from August 21, 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
No speed verdict because AWS S3 completed 0% of runs and Mosaic completed 0% of runs, fewer than the 50% required.
View the full Snapshot create leaderboard →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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AWS S3 was faster in both storage measurements with a speed verdict. In Upload (10 MB) (October 30, 2026), AWS S3 had a median upload time of 490ms versus 1154ms for Mosaic, 2.35x faster. In Download (10 MB) (October 30, 2026), AWS S3 had a median download time of 137ms versus 323ms for Mosaic, 2.35x faster.