alternatives to
Open, Multi-modal Catalog for Data & AI
Apache Gravitino, Apache Polaris, and Lakekeeper. 3 alternatives to Unity Catalog, in Java, Rust. Compare fit, licence, stars and the latest signed release.
| Tool | Fit | Stars | Licence | Terms | Self-hosted | Language | Latest | Last push |
|---|---|---|---|---|---|---|---|---|
| Apache Gravitino | Full replacement | 3.3k | Apache-2.0 | Open source | Yes | Java | v1.3.1 | 2026-10-19 |
| Apache Polaris | Partial | 2.1k | Apache-2.0 | Open source | Yes | Java | apache-polaris-1.8.0 | 2026-10-19 |
| Lakekeeper | Partial | 1.5k | Apache-2.0 | Open source | Yes | Rust | v0.14.1 | 2026-10-17 |
3 alternatives
World's most powerful open data catalog for building a high-performance, geo-distributed and federated metadata lake.
Federated metadata catalog over Hive, Iceberg, relational databases and Kafka.
Apache Polaris, the interoperable, open source catalog for Apache Iceberg
Open Iceberg REST catalog; it covers tables and access control but not Delta or ML assets.
Apache Iceberg REST Catalog in Rust — access control, credential vending and audit for every engine and AI agent. Apache 2.0.
Iceberg REST catalog with access control and credential vending; Iceberg tables only.