OpenMetadata

What is OpenMetadata?

OpenMetadata is an open source data catalog and metadata management platform that helps teams discover, document, and govern their data. It pulls metadata from 130+ sources into a single searchable place, tracks how data flows through your stack, and layers on governance, quality checks, and collaboration — all under the Apache 2.0 license.

What is OpenMetadata best for?

Data and platform teams that need one trusted place to find data assets, understand where they come from, and enforce ownership and quality across a warehouse, lakehouse, BI, and pipeline stack. It fits organizations that want an enterprise-grade catalog without the six-figure license of Collibra or Alation.

What can OpenMetadata do?

• Catalog and search 130+ connectors across databases, warehouses, dashboards, pipelines, ML models, and message queues (Snowflake, BigQuery, Databricks, Kafka, Tableau, and more)
• Track table-level and column-level lineage, with support for OpenLineage pipeline events
• Run data quality tests and profiling — freshness, volume, null, uniqueness, and custom checks with incidents and alerts
• Govern data with glossaries, classifications, domains, data products, roles, and policies
• Collaborate in-context with descriptions, ownership, tasks, announcements, and conversations on any asset
• Automate and extend through REST APIs, Python/Java/TypeScript SDKs, and a Model Context Protocol (MCP) server

Where does OpenMetadata fall short?

• It carries real operational weight: a production deployment runs the Java service, a React UI, a search backend (Elasticsearch/OpenSearch), and a MySQL or Postgres database, plus Python ingestion jobs — more moving parts than a lightweight catalog.
• The newest AI-context and enterprise agent features are steered toward Collate, the paid managed cloud, so the leading edge of the roadmap isn’t always in the open source build.
• Connector coverage is broad but uneven — some sources expose richer lineage and profiling than others, so real-world results depend on which systems you’re cataloging.

Is OpenMetadata free?

Yes — OpenMetadata is fully open source under Apache 2.0 and free to self-host, with no paid tier gating the core catalog, lineage, governance, or data quality features. The company behind it offers Collate, a paid managed cloud with enterprise support and additional AI agents, but you’re paying for hosting and support, not to unlock the software.

What does OpenMetadata replace?

OpenMetadata is a self-hosted alternative to enterprise data catalog and governance platforms like Collibra, Alation, Atlan, and the cataloging side of Informatica. It covers the same discovery, lineage, and governance jobs without per-seat SaaS licensing.

FAQ

Is OpenMetadata open source? Yes. The full platform is released under the Apache 2.0 license, one of the most permissive open source licenses, and the code is public on GitHub.

Can I self-host OpenMetadata for free? Yes. You can run the entire platform on your own infrastructure with Docker or Kubernetes at no license cost — you only pay for the servers it runs on.

Is OpenMetadata a good Collibra or Alation alternative? For teams comfortable running their own stack, yes — it delivers cataloging, column-level lineage, governance, and data quality without enterprise SaaS pricing. Large enterprises wanting turnkey managed operations may prefer the paid Collate cloud or a commercial vendor.

What do I need to run OpenMetadata? A server (or Kubernetes cluster) with Docker, plus a MySQL or Postgres database and an Elasticsearch/OpenSearch instance for search. Metadata is pulled in through Python-based ingestion connectors you schedule.