# Amazon S3 vs Backblaze B2 (slim)

> Amazon S3 has a score of 79.3 (A) against Backblaze B2's 75.4 (BB). Both do storage object. The largest gap is reliability, 35 points. Category scores, facts, verdicts and agent notes side by side.

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Amazon S3 has a score of 79.3 (A) against Backblaze B2's 75.4 (BB). Both do storage object. The largest gap is reliability, 35 points.

- Amazon S3: A 79.3, rank #9 of 452 · https://www.anchorterminal.com/tools/amazon-s3.min.md
- Backblaze B2: BB 75.4, rank #35 of 452 · https://www.anchorterminal.com/tools/backblaze-b2.min.md
- Pick Amazon S3 for reliability (+35), transparency & trust (+6). Pick Backblaze B2 for payments & pricing (+20), maintenance & community (+7).

| Category | Amazon S3 | Backblaze B2 |
| --- | --- | --- |
| Reliability (16%) | 95 | 60 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 92 | 89 |
| Agent ergonomics (13%) | 83 | 85 |
| Security & auth (14%) | 86 | 90 |
| Payments & pricing (10%) | 20 | 40 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 83 | 90 |
| Transparency & trust (7%) | 80 | 74 |