# Azure Key Vault vs Keeper Secrets Manager

> Azure Key Vault scores 74.7 (BB) on agent readiness against Keeper Secrets Manager's 69.4 (B), and leads in 3 of 7 scored categories. Keeper Secrets Manager leads on maintenance & community. Both do secrets store. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/azure-key-vault-vs-keeper-secrets-manager
- Markdown: https://www.anchorterminal.com/compare/azure-key-vault-vs-keeper-secrets-manager.md (~2,600 tokens)
- Slim: https://www.anchorterminal.com/compare/azure-key-vault-vs-keeper-secrets-manager.min.md (~730 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/azure-key-vault-vs-keeper-secrets-manager.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: 2026-10-08

Azure Key Vault scores 74.7 (BB) on agent readiness against Keeper Secrets Manager's 69.4 (B), and leads in 3 of 7 scored categories. Keeper Secrets Manager leads on maintenance & community. Both do secrets store.

- Azure Key Vault: grade BB, 74.7/100, rank #60 of 722. Markdown https://www.anchorterminal.com/tools/azure-key-vault.md · JSON https://www.anchorterminal.com/api/v1/tools/azure-key-vault.json
- Keeper Secrets Manager: grade B, 69.4/100, rank #159 of 722. Markdown https://www.anchorterminal.com/tools/keeper-secrets-manager.md · JSON https://www.anchorterminal.com/api/v1/tools/keeper-secrets-manager.json

## Which one, for what

### Azure Key Vault (BB)

Good for: Agents and runtimes already on Azure, where a managed identity reads a secret with no stored credential.

Ahead on:
- Reliability, 87 against 76
- Schema & documentation, 85 against 71
- Agent ergonomics, 75 against 63

Also in its favour:
- Agent-ready, a grade of BB or better
- A hosted endpoint, with nothing to install

Watch for: No managed rotation for secrets. Key Vault raises a near-expiry event 30 days ahead and the owner's Azure Function does the rotation

### Keeper Secrets Manager (B)

Good for: Companies already on Keeper's business vault that want per-device machine identities with client-side decryption and an official MCP server.

Ahead on:
- Maintenance & community, 92 against 80

Also in its favour:
- Runs on your own machine

Watch for: Secrets Manager is priced by quote. The add-ons page shows Custom Pricing and Request a Quote


## Score by category

| Category | Weight | Azure Key Vault | Keeper Secrets Manager | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 87 | 76 | Azure Key Vault +11 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 85 | 71 | Azure Key Vault +14 |
| Agent ergonomics | 13% (16.2 this run) | 75 | 63 | Azure Key Vault +12 |
| Security & auth | 14% (17.5 this run) | 86 | 86 | even |
| Payments & pricing | 10% (12.5 this run) | 20 | 20 | even |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 80 | 92 | Keeper Secrets Manager +12 |
| Transparency & trust | 7% (8.8 this run) | 77 | 78 | Keeper Secrets Manager +1 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **74.7 · BB** | **69.4 · B** | |

## Facts side by side

| Fact | Azure Key Vault | Keeper Secrets Manager |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Microsoft Corporation | Keeper Security, Inc. |
| Hosted endpoint | `https://<vault-name>.vault.azure.net` | no (local only) |
| Transports | HTTP | HTTP, stdio |
| Auth | OAuth | API key |
| Pricing | Pay per use | Paid |
| x402 | no | no |
| Licence | Proprietary service under Microsoft's Product Terms. The Azure SDK client libraries are MIT | Proprietary service under Keeper's SaaS Terms of Use. The SDKs, CLI, MCP server and agent kit on GitHub are MIT |
| Tools exposed | none | 19 |
| Read-only variant documented | no | yes |
| llms.txt | no | yes |
| Last release | 2026-10-02 | 2026-10-06 |
| 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 | not found in the text |
| Arbitration or class-action waiver | not found in the text | yes |
| Popularity | 2.6M npm/wk, 9.5M PyPI/wk | 117 stars, 52k npm/wk, 45k PyPI/wk |

## Verdicts

**Azure Key Vault.** Access runs on Microsoft Entra ID tokens and Azure roles that can be scoped to one secret, with soft delete, a 99.99 per cent SLA and a public OpenAPI contract. Secret rotation needs an Event Grid trigger and a function the owner writes, audit logging is off until enabled, and an Azure subscription needs a person and a payment card.

**Keeper Secrets Manager.** Each client device signs requests with its own key, is locked to an IP address by default and can be revoked alone, and secrets decrypt only on the client. The add-on has no public price, no request limits were found in the reviewed documentation, and a person must create the application and device in the vault.

## Before you call either

### Azure Key Vault

1. Request a token for the resource https://vault.azure.net and send it as a Bearer header. Every call must carry `api-version`, such as 2025-07-01, because there is no default
2. Ask for the Key Vault Secrets User role on the vault or the single secret. Key Vault Reader returns metadata only, not values
3. Cache secret values in memory. A vault allows 4,000 reads and 300 secret creations per 10 seconds, and a subscription five times that
4. On 429 wait 1, 2, 4, 8 then 16 seconds. Throttled requests do not count against the limit
5. Don't retry Set Secret blindly. Each successful call creates a new version of the secret

### Keeper Secrets Manager

1. Ask the vault owner for a new device on an application that holds only the folders the task needs. Use the Base64 configuration, not the first one-time token
2. Run commands under `ksm exec` so secrets arrive as environment variables and stay out of the model's context
3. Expect HTTP 403 with `{"error":"throttled"}` under load. The Python SDK retries five times from 11 seconds, so allow for long waits
4. A device is locked to the IP address it first connects from unless it was created with `--unlock-ip`. Check this before running from a dynamic address
5. Leave `--auto-approve` off on the MCP server. It removes confirmation for deletes and for unmasking values

## Questions

### Which is better for AI agents, Azure Key Vault or Keeper Secrets Manager?

Azure Key Vault scores 74.7 (BB) on agent readiness against Keeper Secrets Manager's 69.4 (B), and leads in 3 of 7 scored categories. Keeper Secrets Manager leads on maintenance & community.

### Do Azure Key Vault and Keeper Secrets Manager need an API key?

Azure Key Vault uses an OAuth sign-in. Keeper Secrets Manager needs an API key.

### Can an agent call Azure Key Vault and Keeper Secrets Manager without installing anything?

Azure Key Vault has a hosted endpoint at https://<vault-name>.vault.azure.net. Keeper Secrets Manager runs on your own machine, with no hosted endpoint listed.


## For agents

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

## Other comparisons with Azure Key Vault or Keeper Secrets Manager

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- [Google Cloud Secret Manager vs Keeper Secrets Manager](https://www.anchorterminal.com/compare/google-secret-manager-vs-keeper-secrets-manager.md)
- [HashiCorp Vault + Vault MCP Server vs Keeper Secrets Manager](https://www.anchorterminal.com/compare/hashicorp-vault-vs-keeper-secrets-manager.md)
- [Infisical vs Keeper Secrets Manager](https://www.anchorterminal.com/compare/infisical-vs-keeper-secrets-manager.md)
- [Keeper Secrets Manager vs Phase](https://www.anchorterminal.com/compare/keeper-secrets-manager-vs-phase.md)
- [Keeper Secrets Manager vs Pulumi ESC](https://www.anchorterminal.com/compare/keeper-secrets-manager-vs-pulumi-esc.md)