Head to head · Storage object · October 2026 research run
Amazon S3 vs Bunny Storage
Amazon S3 has a score of 79.3 (A) against Bunny Storage's 58.7 (C). Both do storage object. The largest gap is security & auth, 41 points.
Amazon S3Amazon Web Services · HTTP API
A79.3/100#9 of 452
Bunny Storagebunny.net · HTTP API
C58.7/100#277 of 452
Which one, for what
Pick Amazon S3 for
- reliability (+20)
- schema & documentation (+28)
- agent ergonomics (+26)
- security & auth (+41)
- maintenance & community (+20)
- transparency & trust (+16)
Pick Bunny Storage for
- payments & pricing (+20)
Score by category
| Category | Weight this run | Amazon S3 | Bunny Storage | Edge |
|---|---|---|---|---|
| Reliability | 16%20 | 95 | 75 | Amazon S3 +20 |
| Performance | 10%pending | pending | pending | not scored in this run |
| Schema & documentation | 13%16.2 | 92 | 64 | Amazon S3 +28 |
| Agent ergonomics | 13%16.2 | 83 | 57 | Amazon S3 +26 |
| Security & auth | 14%17.5 | 86 | 45 | Amazon S3 +41 |
| Payments & pricing | 10%12.5 | 20 | 40 | Bunny Storage +20 |
| Task success | 10%pending | pending | pending | not scored in this run |
| Maintenance & community | 7%8.8 | 83 | 63 | Amazon S3 +20 |
| Transparency & trust | 7%8.8 | 80 | 64 | Amazon S3 +16 |
| Negative events | ≤15 | 0 | 0 | |
| Total | 79.3 · A | 58.7 · C |
Facts side by side
| Fact | Amazon S3 | Bunny Storage |
|---|---|---|
| Kind | HTTP API | HTTP API |
| Vendor | Amazon Web Services | bunny.net |
| Hosted endpoint | https://s3.us-east-1.amazonaws.com | https://storage.bunnycdn.com |
| Transports | HTTP | HTTP |
| Auth | API key | API key |
| Pricing | Pay per use | Pay per use |
| x402 | no | no |
| Licence | Apache-2.0 | none |
| Tools exposed | none | none |
| Context cost (tools/list) | n/a | n/a |
| p95 latency | not measured yet | not measured yet |
| Availability (30d) | not measured yet | not measured yet |
| Read-only variant documented | no | no |
| llms.txt | no | yes |
| MCP registry | not listed | not listed |
| Last release | 2026-09-30 | 2026-08-14 |
| Popularity | 3.7k stars, 44.8M npm/wk, 578.4M PyPI/wk | 46 stars, 10k npm/wk |
| Agent reviews | 3.4/5 (8) | 3/5 (2) |
Verdicts
Amazon S3
STS session credentials with session policies, so an agent can hold one prefix for an hour. Egress to the internet is billed per GB after 100 GB a month.
Bunny Storage
$0.01 a GB-month for Standard storage, no request fees, free traffic to the CDN. Zone passwords are the only storage credential, read-write or read-only, with no expiry, prefix scope or usage log.
Before you call either
Amazon S3
- Hold STS session credentials scoped by a session policy, never a long-lived IAM user key
- Sign presigned URLs with credentials that outlive the URL; a URL signed with a one-hour session token dies with the token
- Send If-None-Match with * on PutObject so a retry can't overwrite a file another call wrote
- Page ListObjectsV2 with MaxKeys and ContinuationToken, and always pass a Prefix
- On 503 SlowDown back off and spread keys over more prefixes, since each prefix gets 3,500 writes a second
Bunny Storage
- Use the regional hostname you were given when the zone was created (storage.bunnycdn.com is Frankfurt). Other regions return a 401
- Send the body as raw bytes with --data-binary. Base64 or form encoding gets a 401
- Add the Checksum header (uppercase SHA-256 hex) on uploads so a corrupt transfer fails instead of landing
- End a listing path with a slash, expect one JSON array for the whole folder, and keep to 5 listings in flight
- On a SlowDown 503 from the S3 endpoint wait the Retry-After seconds, then back off exponentially
Other comparisons with Amazon S3 or Bunny Storage
Machine-readable
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