HelixDB

What is HelixDB?

Graph database with built-in vector and full-text search, made for AI agent memory and retrieval.

Who is HelixDB best for?

HelixDB is best for developers building AI agents and RAG apps that need graph and vector search in one database.

• Agent memory

  Agents keep long-term memory of users, conversations and decisions as nodes and edges they can traverse later.

• Permission-aware retrieval

  A graph traversal, such as the documents a user may see, sets the candidates before vector or BM25 ranking runs in the same request.

• Company knowledge graphs

  Code, docs, people and projects sit in one property graph, so answers can point to the owner and the source.

• Embedded use

  The same engine runs inside your app process, as a local server or on Helix Cloud, with the same queries.

How much does HelixDB cost?

HelixDB is free to self-host or embed under Apache 2.0, and Helix Cloud plans start at $5 a month for 200,000 reads and 100,000 writes.

The Growth plan runs a dedicated cluster billed by the hour; the maker does not list its rate. Full pricing on helix-db.com. We checked these prices on 8 Nov 2026.

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Is HelixDB open source?

Yes. HelixDB's code is public under the Apache 2.0 licence, so you can run it on your own server.

What are the best HelixDB alternatives?

HelixDB is an open source alternative to Pinecone. Qdrant, Milvus, Supavec and Deeplake do the same job and are open source too.

PineconeFree

Managed vector database for search, RAG and agents.

QdrantOpen Source

Open-source vector search with real-time indexing.

MilvusOpen Source

Vector database for RAG and semantic search that runs on a laptop, a server or a Kubernetes cluster.

SupavecOpen Source

Open-source RAG for your own data.

DeeplakeOpen Source

Database for AI data that keeps vectors with images, video and text, plus search and versioning.

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