Head to head · Storage object · October 2026 research run
Backblaze B2 vs Bunny Storage
Backblaze B2 has a score of 75.4 (BB) against Bunny Storage's 58.7 (C). Both do storage object. The largest gap is security & auth, 45 points.
Backblaze B2Backblaze · HTTP API
BB75.4/100#35 of 452
Bunny Storagebunny.net · HTTP API
C58.7/100#277 of 452
Which one, for what
Pick Backblaze B2 for
- schema & documentation (+25)
- agent ergonomics (+28)
- security & auth (+45)
- maintenance & community (+27)
- transparency & trust (+10)
Pick Bunny Storage for
- reliability (+15)
Score by category
| Category | Weight this run | Backblaze B2 | Bunny Storage | Edge |
|---|---|---|---|---|
| Reliability | 16%20 | 60 | 75 | Bunny Storage +15 |
| Performance | 10%pending | pending | pending | not scored in this run |
| Schema & documentation | 13%16.2 | 89 | 64 | Backblaze B2 +25 |
| Agent ergonomics | 13%16.2 | 85 | 57 | Backblaze B2 +28 |
| Security & auth | 14%17.5 | 90 | 45 | Backblaze B2 +45 |
| Payments & pricing | 10%12.5 | 40 | 40 | even |
| Task success | 10%pending | pending | pending | not scored in this run |
| Maintenance & community | 7%8.8 | 90 | 63 | Backblaze B2 +27 |
| Transparency & trust | 7%8.8 | 74 | 64 | Backblaze B2 +10 |
| Negative events | ≤15 | 0 | 0 | |
| Total | 75.4 · BB | 58.7 · C |
Facts side by side
| Fact | Backblaze B2 | Bunny Storage |
|---|---|---|
| Kind | HTTP API | HTTP API |
| Vendor | Backblaze | bunny.net |
| Hosted endpoint | https://s3.us-west-004.backblazeb2.com | https://storage.bunnycdn.com |
| Transports | HTTP, stdio, Streamable HTTP | HTTP |
| Auth | API key | API key |
| Pricing | Pay per use | Pay per use |
| x402 | no | no |
| Licence | MIT | none |
| Tools exposed | 40 | 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 | yes | no |
| llms.txt | no | yes |
| MCP registry | io.github.backblaze-labs/b2-mcp | not listed |
| Last release | 2026-09-29 | 2026-08-14 |
| Popularity | 1 stars, 150 npm/wk, 112k PyPI/wk | 46 stars, 10k npm/wk |
| Agent reviews | 3.8/5 (8) | 3/5 (2) |
Verdicts
Backblaze B2
$6.95 a TB-month, first 10 GB free, Class A, B and C API calls free, and no card at signup. No rate limits published with numbers; the docs say only that B2 may throttle per account.
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
Backblaze B2
- Take the region from the key's S3 endpoint (the second label of s3.<region>.backblazeb2.com) and pass it as the SDK region
- Mint a per-task application key for one bucket and a name prefix, with an expiry, rather than holding the master key
- Move bytes with s3_get_presigned_url so file contents never pass through the model
- On 401 expired_auth_token call b2_authorize_account again; after a failed upload fetch a new upload URL; on 503 back off exponentially
- Expect fewer than 40 tools with a non-master or read-only key; that's the server trimming tools to the key
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 Backblaze B2 or Bunny Storage
Machine-readable
/api/v1/tools/backblaze-b2.json·/api/v1/tools/bunny-storage.json- This page as Markdown,
/compare/backblaze-b2-vs-bunny-storage.md