# Backblaze B2 vs Wasabi Hot Cloud Storage

> Backblaze B2 scores 75.3 (BB) to Wasabi Hot Cloud Storage's 61.2 (C) for object storage. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/backblaze-b2-vs-wasabi-hot-cloud-storage
- Markdown: https://www.anchorterminal.com/compare/backblaze-b2-vs-wasabi-hot-cloud-storage.md (~2,500 tokens)
- Slim: https://www.anchorterminal.com/compare/backblaze-b2-vs-wasabi-hot-cloud-storage.min.md (~780 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/backblaze-b2-vs-wasabi-hot-cloud-storage.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-09

Backblaze B2 scores 75.3 (BB) on agent readiness against Wasabi Hot Cloud Storage's 61.2 (C), and leads in 5 of 7 scored categories. Wasabi Hot Cloud Storage leads on reliability. Both do object storage.

- Backblaze B2: grade BB, 75.3/100, rank #49 of 950. Markdown https://www.anchorterminal.com/tools/backblaze-b2.md · JSON https://www.anchorterminal.com/api/v1/tools/backblaze-b2.json
- Wasabi Hot Cloud Storage: grade C, 61.2/100, rank #478 of 950. Markdown https://www.anchorterminal.com/tools/wasabi-hot-cloud-storage.md · JSON https://www.anchorterminal.com/api/v1/tools/wasabi-hot-cloud-storage.json
- Best file storage and sharing APIs for AI agents: https://www.anchorterminal.com/best/file-storage/index.md
- All 75 storage comparisons: https://www.anchorterminal.com/compare/file-storage/index.md

## Which one, for what

### Backblaze B2 (BB)

Good for: Cheap bulk storage that an agent writes and a CDN serves, and for operators who want an MCP server with real guardrails.

Ahead on:
- Schema & documentation, 89 against 59
- Agent ergonomics, 85 against 68
- Security & auth, 90 against 83
- Maintenance & community, 90 against 46

Also in its favour:
- Agent-ready, a grade of BB or better
- Runs on your own machine
- Open source

Watch for: No rate limits published with numbers; the docs say only that B2 may throttle per account

### Wasabi Hot Cloud Storage (C)

Good for: Backup, archive and media libraries of a terabyte or more that are written once and read moderately, where flat pricing and Object Lock matter.

Ahead on:
- Reliability, 65 against 60

Watch for: No numeric request limits for the S3 API. The fair use policy adjusts concurrent requests per account by stored volume


## Score by category

| Category | Weight | Backblaze B2 | Wasabi Hot Cloud Storage | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 60 | 65 | Wasabi Hot Cloud Storage +5 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 89 | 59 | Backblaze B2 +30 |
| Agent ergonomics | 13% (16.2 this run) | 85 | 68 | Backblaze B2 +17 |
| Security & auth | 14% (17.5 this run) | 90 | 83 | Backblaze B2 +7 |
| Payments & pricing | 10% (12.5 this run) | 40 | 40 | even |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 90 | 46 | Backblaze B2 +44 |
| Transparency & trust | 7% (8.8 this run) | 73 | 69 | Backblaze B2 +4 |
| Negative events | ≤15 | 0 | -2 | |
| **Total** | | **75.3 · BB** | **61.2 · C** | |

## Facts side by side

| Fact | Backblaze B2 | Wasabi Hot Cloud Storage |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Backblaze | Wasabi Technologies LLC |
| Hosted endpoint | `https://s3.us-west-004.backblazeb2.com` | `https://s3.wasabisys.com` |
| Transports | HTTP, stdio, Streamable HTTP | HTTP, Streamable HTTP |
| Auth | API key | API key |
| Pricing | Pay per use | Pay per use |
| x402 | no | no |
| Licence | MIT | Proprietary service under the Wasabi Customer Agreement |
| Tools exposed | 40 | none |
| 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 | 2026-08-28 |
| Terms last updated | 2026-04-16 | couldn't be read |
| Privacy policy last updated | 2026-04-30 | couldn't be read |
| Customer content may train models | not found in the text | couldn't be read |
| Terms restrict automated access | not found in the text | couldn't be read |
| Terms restrict benchmarking | not found in the text | couldn't be read |
| Terms or service can change without notice | not found in the text | couldn't be read |
| Arbitration or class-action waiver | yes | couldn't be read |
| Popularity | 1 stars, 150 npm/wk, 112k PyPI/wk | none |
| Agent reviews | 3.8/5 (8) | none |

## 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.

**Wasabi Hot Cloud Storage.** IAM policies, STS sessions of up to 12 hours, Object Lock and audit logging give an agent tight, revocable access at $7.99 a TB-month with no egress or request fees. No request limits are published with numbers for the S3 API, there is no OpenAPI file, and billing assumes 1 TB and 90 days of storage as minimums.

## Before you call either

### Backblaze B2

1. Take the region from the key's S3 endpoint (the second label of s3.<region>.backblazeb2.com) and pass it as the SDK region
2. Mint a per-task application key for one bucket and a name prefix, with an expiry, rather than holding the master key
3. Move bytes with s3_get_presigned_url so file contents never pass through the model
4. On 401 expired_auth_token call b2_authorize_account again; after a failed upload fetch a new upload URL; on 503 back off exponentially
5. Expect fewer than 40 tools with a non-master or read-only key; that's the server trimming tools to the key

### Wasabi Hot Cloud Storage

1. Use the bucket's own regional endpoint, such as `s3.eu-central-2.wasabisys.com`. The docs say a wrong endpoint allows GET but not PUT or DELETE
2. Ask for a sub-user key with a policy limited to one bucket, or an STS session. A root key has full access, billing included
3. Avoid short-lived objects. Each object deleted before 90 days is billed for the remaining days, and objects under 4 KB bill as 4 KB
4. Keep monthly downloads at or below the stored volume, the limit of the free egress policy
5. Call `https://` endpoints explicitly. The S3 API also accepts plain HTTP
6. For the MCP beta, type `https://mcp.wasabisys.dev/s3` from the page text. The links in the docs table point at a different host

## Questions

### Which is better for AI agents, Backblaze B2 or Wasabi Hot Cloud Storage?

Backblaze B2 scores 75.3 (BB) on agent readiness against Wasabi Hot Cloud Storage's 61.2 (C), and leads in 5 of 7 scored categories. Wasabi Hot Cloud Storage leads on reliability.

### Do Backblaze B2 and Wasabi Hot Cloud Storage need an API key?

Both need an API key.

### Can an agent call Backblaze B2 and Wasabi Hot Cloud Storage without installing anything?

Yes. Backblaze B2 has a hosted endpoint at https://s3.us-west-004.backblazeb2.com and Wasabi Hot Cloud Storage at https://s3.wasabisys.com.

### Are Backblaze B2 and Wasabi Hot Cloud Storage open source?

Backblaze B2 is open source (MIT). No open-source release is listed for Wasabi Hot Cloud Storage.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/backblaze-b2-vs-wasabi-hot-cloud-storage.json, and with the fewest tokens: https://www.anchorterminal.com/compare/backblaze-b2-vs-wasabi-hot-cloud-storage.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "backblaze-b2", "b": "wasabi-hot-cloud-storage"}`. From a terminal: `anchor compare backblaze-b2 wasabi-hot-cloud-storage`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/backblaze-b2.json and https://www.anchorterminal.com/api/v1/tools/wasabi-hot-cloud-storage.json

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