Head to head · Data catalogues · October 2026 research run
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.
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
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 this run | Alation | OpenMetadata | Edge |
|---|---|---|---|---|
| Reliability | 16%20 | 61 | 84 | OpenMetadata +23 |
| Performance | 10%pending | pending | pending | not scored in this run |
| Schema & documentation | 13%16.2 | 78 | 85 | OpenMetadata +7 |
| Agent ergonomics | 13%16.2 | 71 | 85 | OpenMetadata +14 |
| Security & auth | 14%17.5 | 63 | 65 | OpenMetadata +2 |
| Payments & pricing | 10%12.5 | 0 | 20 | OpenMetadata +20 |
| Task success | 10%pending | pending | pending | not scored in this run |
| Maintenance & community | 7%8.8 | 71 | 89 | OpenMetadata +18 |
| Transparency & trust | 7%8.8 | 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
- 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
- Pin
alation-ai-agent-mcp==1.0.0rc3. An unpinned install resolves to 0.12.0, which predates the catalogue search agent - Call
catalog_context_search_agentfor catalogue questions.alation_contextis deprecated and its description tells models not to call it directly - Watch
X-Entitlement-Usageon Aggregated Context API responses. The 2,000 free calls never reset, and a quota 429 is not retryable - Page with
limitandskipand followX-Next-Page. The BI Source API usesoffset, and one call returns at most 1,000 objects
OpenMetadata
- Set
entityTypefor data-quality questions. testCase and testSuite are outside the default search scope - Match a table's tests on
originEntityFQN, notentityFQN. Column-level tests store the column's FQN there - Read several known entities in one
search_metadatacall with atermsclause onfullyQualifiedNameplusfields - Use a bot JWT or a personal access token as
Authorization: Bearerfor unattended runs. OAuth needs a browser sign-in - 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).
Other comparisons with Alation or OpenMetadata
Machine-readable
- This page as Markdown
/compare/alation-vs-openmetadata.md· slim.min.md· JSON.json(or sendAccept: text/markdown) - Each listing in full
/api/v1/tools/alation.json·/api/v1/tools/openmetadata.json - From a terminal
anchor compare alation openmetadata(the CLI) - Over MCP
compare_tools {"a": "alation", "b": "openmetadata"}at/mcp, no key