Graph databases & knowledge graphs · JanusGraph (Linux Foundation project)
JanusGraph
Open-source distributed property-graph database queried with Gremlin, with pluggable storage and indexing backends.
JanusGraph is an open-source, distributed property-graph database queried through Apache TinkerPop's Gremlin, and its defining trait is pluggability: it has no storage engine of its own, instead running on top of Apache Cassandra, Apache HBase, ScyllaDB or Google Cloud Bigtable, with Elasticsearch, Apache Solr or Apache Lucene handling mixed-index search. That lets a team reuse infrastructure and operational expertise they already have instead of adopting a new storage system just for graph data. It originated as a fork of Titan and is now governed as a Linux Foundation project with no single vendor; there is no first-party managed cloud service, so it is run self-hosted or via a compatible managed backend. It suits large-scale, horizontally distributed graphs where the team already operates one of its supported storage layers.
At a glance
| Vendor | JanusGraph (Linux Foundation project) |
|---|---|
| Pricing model | Open source + paid options |
| Free tier | Yes |
| Deployment | Self-hosted |
| Open source | Yes (Apache-2.0) |
| Best for | Teams running large distributed graphs on infrastructure they already operate, such as Cassandra or HBase clusters. |
Pricing
Free open-source software; costs come from the storage and indexing backends you choose to run it on.
Pricing has not been verified yet — see the vendor's site.
Features
- Gremlin query language (Apache TinkerPop)
- Pluggable storage backends: Cassandra, HBase, ScyllaDB, Bigtable
- Pluggable indexing: Elasticsearch, Solr, Lucene
- Horizontal scalability via the chosen storage layer
- Distributed transactions with eventual or strict consistency options
- Vendor-neutral, community-governed development
Integrations
Profile last reviewed September 21, 2026