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Object Storage comparison · 2026
Amazon S3 (81) and Backblaze B2 (86) are closely matched — this is one of the tightest Object Storage comparisons in our database, with just 5 points separating them overall. Amazon S3 leads on Ecosystem (98 vs 68), while Backblaze B2 has the edge on Egress Cost (88 vs 40). The two are closest on Developer UX, where the gap is just 7 points. Both offer a free tier, making either a low-risk starting point. Use the radar chart and dimension table below to find which fits your specific priorities best.
Amazon S3
The original and most widely adopted object store
81/100
Backblaze B2
The cheapest reliable cloud storage on the market
86/100
Radar comparison
Amazon S3
81
Backblaze B2
86
Durability
Data redundancy guarantees and SLA-backed durability.
Price / Value
Storage cost per GB and egress fees.
Performance
Upload/download throughput and latency.
Developer UX
SDK quality, S3 API compatibility, and setup speed.
Egress Cost
Cost of transferring data out — often the hidden expense.
Ecosystem
CDN integration, multi-region support, and tooling.
Overall Score
Based on our independent scoring across 6 dimensions, Backblaze B2 scores 86/100 overall versus Amazon S3's 81/100 — a 5-point margin. Backblaze B2 leads on Durability in particular. That said, Amazon S3 may still be the right choice if the dimensions where it scores higher match your specific priorities — the radar chart above shows the full profile side by side.
Both Amazon S3 and Backblaze B2 offer a free tier, so entry-level cost is not a differentiating factor. Compare the feature and usage limits of each free plan to see which gives you more headroom before a paid upgrade is needed.
Amazon S3 scores higher on Ecosystem — 98/100 versus 68/100 for Backblaze B2. If ecosystem is your primary decision criterion, Amazon S3 is the stronger choice in this head-to-head.
Switching between object storage tools is generally possible but involves migration effort: exporting your data or configuration from Amazon S3, re-importing or reconfiguring in Backblaze B2, and updating any API integrations or environment variables in your codebase. The effort scales with how deeply embedded the tool is in your stack. Test Backblaze B2 on a non-production project first before migrating.
Amazon S3 (81/100) is the better fit for teams who prioritise durability — its strongest dimension — and who want a free entry point. Backblaze B2 (86/100) is the better fit for teams who prioritise price / value and want a free entry point. If both dimensions matter equally, the overall score winner (Backblaze B2) is the safer default choice.
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