helix-db vs omnigraph
Rust OLTP graph database on object storage with native vector and BM25 search: property graph, traversal-prefiltered ANN and full-text in one transactional engine; Rust, TS, Go, Python SDKs. — versus — Lakehouse graph database for agent context — graph, vector and full-text retrieval fused in one runtime on branchable Lance/S3 storage; agent fleets write on isolated branches and merge Git-style.
Both fuse graph, vector and full-text retrieval over object storage for agent context; omnigraph adds Git-style branch-and-merge on Lance, HelixDB focuses on transactional OLTP writes.
| helix-db | omnigraph | |
|---|---|---|
| Stars | 6.1k | 1.2k |
| Forks | 371 | 256 |
| Language | Rust | Rust |
| License | Apache-2.0 | MIT |
| Last activity | today | today |
| Topics | knowledge-graphs, rag | memory, knowledge-graphs |
| Curated connections | 3 | 12 |
helix-db — the curator's take
Pick HelixDB when your agent's retrieval is really a graph question with a similarity step inside it ('passages near this embedding, but only ones linked to this customer') and you would rather not glue Neo4j to a vector store and keep them consistent. Graph, vectors and BM25 live in one transactional engine on object storage, queried through typed SDK builders in four languages, and `helix chef` scaffolds an app through your coding agent. Local dev needs Docker or Podman unless you use embedded mode. Skip it if you need Cypher or Bolt compatibility with an existing Neo4j stack (hydradb speaks both), or if your data is flat documents: a plain vector store is simpler.
omnigraph — the curator's take
Reach for it when many agents must share one evolving knowledge store and you need blame, rollback and review on their writes — branch-per-agent with merge gates is the feature nothing else in this space has; also strong when retrieval genuinely needs graph + vector + full-text fused, not a vector store with metadata filters. NOT a drop-in vector DB: you take on a server, cluster.yaml, schemas and Cedar policy — for plain RAG recall, Chroma is answering queries before you've finished omnigraph's docs. Young project on a credible Rust/Lance foundation; expect sharp edges and a moving API.