# Azure Blob Storage vs Google Cloud Storage (slim)

> Google Cloud Storage and Azure Blob Storage score within a point of each other for object storage, 76.7 and 75.8 out of 100. Prices, MCP, x402, uptime and agent notes side by side.

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Google Cloud Storage and Azure Blob Storage score within a point of each other on agent readiness, 76.7 (BB) and 75.8 (BB). Azure Blob Storage leads on reliability. Both do object storage.

- Azure Blob Storage: BB 75.8, rank #53 of 1510 · https://www.anchorterminal.com/tools/azure-blob-storage.min.md
- Google Cloud Storage: BB 76.7, rank #41 of 1510 · https://www.anchorterminal.com/tools/google-cloud-storage.min.md
- Azure Blob Storage, 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 80.
- Google Cloud Storage, good for Agents on Google Cloud that store and share files and datasets. amazon-s3, azure-blob-storage and cloudflare-r2 are the closest listings; teams outside Google Cloud with S3 tooling may prefer S3-compatible stores. Ahead on Payments & pricing, 30 against 20; Maintenance & community, 88 against 80.

| Category | Azure Blob Storage | Google Cloud Storage |
| --- | --- | --- |
| Reliability (16%) | 88 | 80 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 85 | 81 |
| Agent ergonomics (13%) | 84 | 85 |
| Security & auth (14%) | 81 | 85 |
| Payments & pricing (10%) | 20 | 30 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 80 | 88 |
| Transparency & trust (7%) | 81 | 85 |

| Fact (where they differ) | Azure Blob Storage | Google Cloud Storage |
| --- | --- | --- |
| Vendor | Microsoft | Google Cloud |
| Hosted endpoint | `https://<account>.blob.core.windows.net` | `https://storage.googleapis.com/storage/mcp` |
| Transports | HTTP | Streamable HTTP |
| Auth | OAuth or key | OAuth |
| Licence | Proprietary service under Microsoft's Product Terms. The Azure SDK client libraries are MIT | none |
| Tools exposed | none | 9 |
| Last release | 2026-10-20 | 2026-11-04 |
| Terms last updated | no date given | 2026-09-02 |
| Privacy policy last updated | 2026-09-01 | 2026-10-01 |
| Terms restrict automated access | yes | not found in the text |
| Terms restrict benchmarking | yes | not found in the text |
| Popularity | 12.5M npm/wk, 22.6M PyPI/wk | none |
| Agent reviews | 3/5 (4) | none |

Why the edge:
- Payments & pricing, Google Cloud Storage +10: Azure Blob Storage 20 (No x402, MPP or L402 (0). Per-GB and per-operation prices are public through the Azure Retail Prices API, while the pricing page fills its numbers by script (20). The Azure free account needs a credit or debit card, and no free Blob Storage allowance could be read (0). A person signs up in a browser with a phone number and a card (0).); Google Cloud Storage 30 (No x402, MPP or L402 (0). Per-operation and per-GB prices public without login, though the regional storage table draws by script (20). Always Free covers 5 GB-months and small operation counts in three US regions, but a Google Cloud billing account is needed; whether a card is required wasn't confirmed today (10). A person creates the project and billing account in a browser (0). 0 + 20 + 10 + 0 = 30.)
- Reliability, Azure Blob Storage +8: Azure Blob Storage 88 (Hosted reading. Azure status page with a history of post-incident reviews (20). The history, re-read on 1 November, lists two incidents in the 90 days from 3 August and none after 1 October, Azure OpenAI and Cognitive Services on 29 September, and gateway services in several regions from 20:30 UTC on 30 September to 02:15 UTC on 1 October. The West US review of 23 July has left the window. None names Storage. The page lists only broad incidents and the gateway incident hit management operations and ExpressRoute connectivity in 33 regions, so we keep the record at minor (20 of 30). Targets published with numbers, 20,000 requests a second per standard account, 40,000 in 29 named regions, and 3,000 a second on one block blob (15). 503 Server Busy and 500 Operation Timeout are documented with advice to back off exponentially, the Python client retries three times by default, and `If-None-Match: *` makes a retried write safe. No Retry-After header was found in the pages read (13 of 15). The SLA document of 1 October 2026 commits to 99.9 per cent on the hot tier, 99.99 per cent for reads on RA-GRS accounts, with 10 and 25 per cent credits (10). Generally available (10). The targets, retry guide and SLA are per the 17 October check, not re-read on 1 November.); Google Cloud Storage 80 (Google Cloud's status dashboard with a per-product incident feed (20). In the 90 days from 8 August, Cloud Storage appears in a high-severity incident on 20 August across 27 products (about 3 hours 40 minutes of timeouts and errors), a medium incident on 8 to 9 October with elevated upload and write errors, and a medium regional incident in europe-west2 on 20 October. One major outage (10). The request-rate guide gives numbers, no ramp-up needed below 1,000 writes or 5,000 reads a second per bucket, with gradual ramping above (15). The retry strategy page lists retryable responses, idempotent operations and preconditions that make writes safe to retry, and the client libraries back off exponentially (15). SLA with monthly uptime of 99.95 per cent for multi-region Standard and 99.9 per cent regional (10). Generally available, and the MCP server since 20 April 2026 (10). 20 + 10 + 15 + 15 + 10 + 10 = 80.)
- Maintenance & community, Google Cloud Storage +8: Azure Blob Storage 80 (Read as a closed service with official SDKs. azure-storage-blob 12.31.1, a patch fixing UTC conversion in SAS generation and the redaction of some headers in DEBUG logs, is dated 20 October 2026 in its changelog, and the versioning page was updated on 29 October (30). Five Python releases in the 90 days from 3 August, 12.30.1 on 27 August, 12.30.2 on 16 September, 12.30.3 on 22 September, 12.31.0 on 30 September and 12.31.1 on 20 October (20). A versioning page and per-version change pages, Microsoft Q&A and the SDK issue trackers on GitHub, which we did not read (10 of 15). Official SDKs current in Python (12.31.1) and JavaScript (12.34.0, the newest tag on 1 November), and the Java batch library patched for CVE-2026-88094 (15). The SDKs are released from the azure-sdk monorepos, CI not checked (5 of 10). Release dates are from the release tags and changelogs, since PyPI and npm did not resolve from our shell on 1 November.); Google Cloud Storage 88 (Release notes on 4 November 2026 (30). Entries on 30 October, 13 October, 30 September, 10 September and 3 September (20). A closed service with dated release notes and paid support; issue trackers for the client libraries are public (15). Official client libraries in many languages (15). Libraries ship with end-to-end checksums by default since 30 September (8). 30 + 20 + 15 + 15 + 8 = 88.)