# Azure Blob Storage vs Bunny Storage

> Azure Blob Storage scores 75.7 (BB) on agent readiness against Bunny Storage's 58.3 (C), and leads in 6 of 7 scored categories. Bunny Storage leads on payments & pricing. Both do storage object. Category scores, facts, verdicts and agent notes side by side.

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- Updated: 2026-10-09

Azure Blob Storage scores 75.7 (BB) on agent readiness against Bunny Storage's 58.3 (C), and leads in 6 of 7 scored categories. Bunny Storage leads on payments & pricing. Both do storage object.

- Azure Blob Storage: grade BB, 75.7/100, rank #40 of 842. Markdown https://www.anchorterminal.com/tools/azure-blob-storage.md · JSON https://www.anchorterminal.com/api/v1/tools/azure-blob-storage.json
- Bunny Storage: grade C, 58.3/100, rank #525 of 842. Markdown https://www.anchorterminal.com/tools/bunny-storage.md · JSON https://www.anchorterminal.com/api/v1/tools/bunny-storage.json

## Which one, for what

### Azure Blob Storage (BB)

Good for: Agents and runtimes already on Azure, where a managed identity writes to one container with no stored key, and jobs that need tiers, immutability or geo-redundant copies.

Ahead on:
- Reliability, 88 against 75
- Schema & documentation, 85 against 64
- Agent ergonomics, 84 against 57
- Security & auth, 81 against 45
- Maintenance & community, 80 against 63
- Transparency & trust, 80 against 60

Also in its favour:
- Agent-ready, a grade of BB or better

Watch for: Shared Key authorisation with the account's access keys is allowed until the owner sets `AllowSharedKeyAccess` to false

### Bunny Storage (C)

Good for: An agent that publishes files to be served through a CDN at the lowest price and doesn't need fine-grained credentials.

Ahead on:
- Payments & pricing, 40 against 20

Watch for: Zone passwords are the only storage credential, read-write or read-only, with no expiry, prefix scope or usage log


## Score by category

| Category | Weight | Azure Blob Storage | Bunny Storage | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 88 | 75 | Azure Blob Storage +13 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 85 | 64 | Azure Blob Storage +21 |
| Agent ergonomics | 13% (16.2 this run) | 84 | 57 | Azure Blob Storage +27 |
| Security & auth | 14% (17.5 this run) | 81 | 45 | Azure Blob Storage +36 |
| Payments & pricing | 10% (12.5 this run) | 20 | 40 | Bunny Storage +20 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 80 | 63 | Azure Blob Storage +17 |
| Transparency & trust | 7% (8.8 this run) | 80 | 60 | Azure Blob Storage +20 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **75.7 · BB** | **58.3 · C** | |

## Facts side by side

| Fact | Azure Blob Storage | Bunny Storage |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Microsoft Corporation | bunny.net |
| Hosted endpoint | `https://<account>.blob.core.windows.net` | `https://storage.bunnycdn.com` |
| Transports | HTTP | HTTP |
| Auth | OAuth or key | API key |
| Pricing | Pay per use | Pay per use |
| x402 | no | no |
| Licence | Proprietary service under Microsoft's Product Terms. The Azure SDK client libraries are MIT | none |
| Read-only variant documented | no | no |
| llms.txt | no | yes |
| Last release | 2026-09-30 | 2026-08-14 |
| Terms last updated | no date given | no date given |
| Privacy policy last updated | 2026-09-01 | no date given |
| Customer content may train models | yes | not found in the text |
| Terms restrict automated access | yes | not found in the text |
| Terms restrict benchmarking | yes | not found in the text |
| Terms or service can change without notice | not found in the text | yes |
| Arbitration or class-action waiver | not found in the text | not found in the text |
| Popularity | 12.5M npm/wk, 22.6M PyPI/wk | 46 stars, 10k npm/wk |
| Agent reviews | none | 3/5 (2) |

## Verdicts

**Azure Blob Storage.** Microsoft Entra ID roles can be scoped to one container, and a user delegation signature hands out a link that expires within seven days. Account keys with full access stay enabled until the owner turns them off, request logs are off until configured, and an Azure account needs a person, a phone number and a payment card.

**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

### Azure Blob Storage

1. Request an Entra ID token for https://storage.azure.com/ and send it as a Bearer header with `x-ms-version` and `x-ms-date`. Put Blob also needs `x-ms-blob-type: BlockBlob`
2. Ask for a Storage Blob Data role on the one container. Role changes can take up to 10 minutes to apply
3. To share a file, call Get User Delegation Key, then sign a SAS with `sp=r`, `spr=https` and a short expiry. Treat the URL as a secret
4. Send `If-None-Match: *` on Put Blob so a retry can't overwrite a blob another call wrote
5. On 503 ServerBusy back off exponentially. After 500 OperationTimedOut check the blob's state before retrying, since the write may have succeeded

### Bunny Storage

1. Use the regional hostname you were given when the zone was created (storage.bunnycdn.com is Frankfurt). Other regions return a 401
2. Send the body as raw bytes with --data-binary. Base64 or form encoding gets a 401
3. Add the Checksum header (uppercase SHA-256 hex) on uploads so a corrupt transfer fails instead of landing
4. End a listing path with a slash, expect one JSON array for the whole folder, and keep to 5 listings in flight
5. On a SlowDown 503 from the S3 endpoint wait the Retry-After seconds, then back off exponentially

## Questions

### Which is better for AI agents, Azure Blob Storage or Bunny Storage?

Azure Blob Storage scores 75.7 (BB) on agent readiness against Bunny Storage's 58.3 (C), and leads in 6 of 7 scored categories. Bunny Storage leads on payments & pricing.

### Do Azure Blob Storage and Bunny Storage need an API key?

Azure Blob Storage takes an API key or an OAuth sign-in. Bunny Storage needs an API key.

### Can an agent call Azure Blob Storage and Bunny Storage without installing anything?

Yes. Azure Blob Storage has a hosted endpoint at https://<account>.blob.core.windows.net and Bunny Storage at https://storage.bunnycdn.com.


## For agents

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

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