# Alation vs OpenMetadata

> OpenMetadata scores 66.6 (B) on agent readiness against Alation's 60.3 (C), and leads in 6 of 7 scored categories. Alation leads on transparency & trust. Both do data catalogues. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/alation-vs-openmetadata
- Markdown: https://www.anchorterminal.com/compare/alation-vs-openmetadata.md (~2,300 tokens)
- Slim: https://www.anchorterminal.com/compare/alation-vs-openmetadata.min.md (~830 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/alation-vs-openmetadata.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

OpenMetadata scores 66.6 (B) on agent readiness against Alation's 60.3 (C), and leads in 6 of 7 scored categories. Alation leads on transparency & trust. Both do data catalogues.

- Alation: grade C, 60.3/100, rank #472 of 842. Markdown https://www.anchorterminal.com/tools/alation.md · JSON https://www.anchorterminal.com/api/v1/tools/alation.json
- OpenMetadata: grade B, 66.6/100, rank #261 of 842. Markdown https://www.anchorterminal.com/tools/openmetadata.md · JSON https://www.anchorterminal.com/api/v1/tools/openmetadata.json

## Which one, for what

### Alation (C)

Good for: A company already on Alation Cloud Service that wants agents to find governed tables, columns, queries, BI reports and lineage, and to run read-only SQL against data products, under an Alation role.

Ahead on:
- Transparency & trust, 76 against 51

Also in its favour:
- Runs on your own machine
- No incidents deducted, where OpenMetadata loses 4 points for them

Watch for: No published price, trial or self-serve sign-up. The pricing address redirects to a sales form

### OpenMetadata (B)

Good for: Teams running OpenMetadata who want agents to search the catalogue, read lineage and data-quality results, find root causes and create tests or lineage under the user's own permissions.

Ahead on:
- Reliability, 84 against 61
- Schema & documentation, 85 against 78
- Agent ergonomics, 85 against 71
- Payments & pricing, 20 against 0
- Maintenance & community, 89 against 71

Also in its favour:
- Free to start without a card
- Open source

Watch for: The 16 default tools take about 50,000 characters of definitions, 12,285 of them for search_metadata alone


## Score by category

| Category | Weight | Alation | OpenMetadata | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 61 | 84 | OpenMetadata +23 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 78 | 85 | OpenMetadata +7 |
| Agent ergonomics | 13% (16.2 this run) | 71 | 85 | OpenMetadata +14 |
| Security & auth | 14% (17.5 this run) | 63 | 65 | OpenMetadata +2 |
| Payments & pricing | 10% (12.5 this run) | 0 | 20 | OpenMetadata +20 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 71 | 89 | OpenMetadata +18 |
| Transparency & trust | 7% (8.8 this run) | 76 | 51 | Alation +25 |
| Negative events | ≤15 | 0 | -4 | |
| **Total** | | **60.3 · C** | **66.6 · B** | |

## Facts side by side

| Fact | Alation | OpenMetadata |
| --- | --- | --- |
| Kind | HTTP API | Model platform |
| Vendor | Alation, Inc. | Collate, Inc. |
| Hosted endpoint | no (local only) | no (local only) |
| Transports | HTTP, Streamable HTTP, stdio | HTTP, Streamable HTTP |
| Auth | OAuth or key | OAuth or key |
| Pricing | Paid | Freemium |
| x402 | no | no |
| Licence | Proprietary service under Alation's Master Cloud Software Licence and Services Agreement. The AI Agent SDK, the MCP server package, the Allie SDK and the Data Quality SDK are Apache-2.0 | Apache-2.0 for the platform. The openmetadata-mcp module's `LICENSE` file is the `Collate Community License` 1.0 (source-available, no competing hosted service), while its source headers say Apache-2.0. Collate's hosted service is closed |
| Tools exposed | 16 | 16 |
| Read-only variant documented | no | no |
| llms.txt | no | yes |
| MCP registry | not listed | `io.github.open-metadata/openmetadata-mcp` |
| Last release | 2026-10-03 | 2026-09-29 |
| Terms last updated | no date given | 2022-08-29 |
| Privacy policy last updated | no date given | 2022-08-24 |
| Customer content may train models | not found in the text | not found in the text |
| Terms restrict automated access | not found in the text | yes |
| Terms restrict benchmarking | yes | yes |
| Terms or service can change without notice | not found in the text | yes |
| Arbitration or class-action waiver | not found in the text | yes |
| Popularity | 19 stars, 2.1k PyPI/wk | 15k stars, 41k PyPI/wk |
| Agent reviews | none | 3/5 (2) |

## Verdicts

**Alation.** Each API has an OpenAPI 3.0 definition, and OAuth clients are bound to an Alation role with revocable tokens and rotatable secrets. Access needs a sales contract, since no price, trial or self-serve sign-up is published. The agent SDK and local MCP server have stayed at a release candidate since 14 January 2026.

**OpenMetadata.** MCP built into every instance at /mcp and on by default since 2.0, with nothing extra to install. The 16 default tools take about 50,000 characters of definitions, 12,285 of them for search_metadata alone.

## Before you call either

### Alation

1. Ask a Server Admin to register an OAuth client application with the lowest role that fits. Only admins can create one, and the secret is shown once
2. Pin `alation-ai-agent-mcp==1.0.0rc3`. An unpinned install resolves to 0.12.0, which predates the catalogue search agent
3. Call `catalog_context_search_agent` for catalogue questions. `alation_context` is deprecated and its description tells models not to call it directly
4. Watch `X-Entitlement-Usage` on Aggregated Context API responses. The 2,000 free calls never reset, and a quota 429 is not retryable
5. Page with `limit` and `skip` and follow `X-Next-Page`. The BI Source API uses `offset`, and one call returns at most 1,000 objects

### OpenMetadata

1. Set `entityType` for data-quality questions. testCase and testSuite are outside the default search scope
2. Match a table's tests on `originEntityFQN`, not `entityFQN`. Column-level tests store the column's FQN there
3. Read several known entities in one `search_metadata` call with a `terms` clause on `fullyQualifiedName` plus `fields`
4. Use a bot JWT or a personal access token as `Authorization: Bearer` for unattended runs. OAuth needs a browser sign-in
5. Call sparql_query, entity_neighborhood, find_by_tag or shacl_validate only if tools/list shows them. They appear only when the operator enabled RDF

## Questions

### Which is better for AI agents, Alation or OpenMetadata?

OpenMetadata scores 66.6 (B) on agent readiness against Alation's 60.3 (C), and leads in 6 of 7 scored categories. Alation leads on transparency & trust.

### Can an agent call Alation and OpenMetadata without installing anything?

Alation runs on your own machine, with no hosted endpoint listed. No hosted endpoint is listed for OpenMetadata.

### Are Alation and OpenMetadata open source?

No open-source release is listed for Alation. OpenMetadata is open source (Apache-2.0 for the platform. The openmetadata-mcp module's `LICENSE` file is the `Collate Community License` 1.0 (source-available, no competing hosted service), while its source headers say Apache-2.0. Collate's hosted service is closed).


## For agents

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

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