# HydraDB

> Updated 2026-09-02 · type: tool · category: ai-infrastructure · status: active · rev 1

Open-source distributed graph database in Rust built on object storage — decouples storage from compute so data nodes and indexers scale independently.…

- Open source: yes (AGPL-3.0)
- Self-hostable: yes
- Pricing model: free
- Best for: Organizations and engineers needing a distributed, Neo4j-compatible graph database that stores data on object storage and separates storage from compute.
- Last verified: 2026-09-04

- **Canonical:** https://gtmstacker.com/registry/tool/hydradb/
- **Source:** [github · hydra-db/hydradb](https://github.com/hydra-db/hydradb)
- **Tags:** ai-infrastructure, graph-database, agent-memory, rust, oss-alternative
- **Repository:** https://github.com/hydra-db/hydradb

## Is HydraDB open source?

Yes — AGPL-3.0-licensed.

## How much does HydraDB cost?

It is free to use.

## Can I self-host HydraDB?

Yes — it can be self-hosted.


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Open-source distributed graph database in Rust built on object storage — decouples storage from compute so data nodes and indexers scale independently. Neo4j-compatible via Bolt 5.x, with an HTTP query API supporting OpenCypher and GraphBLAS traversal. An infra / agent-memory / context layer.

## Provenance

- 2k stars, ~640 forks, actively developed. AGPL-3.0 independently verified (2026-09-03) — OSI-approved copyleft; the ProductHunt "now open source" claim was confirmed against the repo. AGPL: modifying AND exposing over a network triggers source-sharing.
- Curated from the GTM Stacker signal registry (news_registry.json); license independently checked.