# JanusGraph/janusgraph

JanusGraph: an open-source, distributed graph database

Repository: https://github.com/JanusGraph/janusgraph
Canonical: https://ross.abutalabs.com/products/janusgraph
Homepage: https://janusgraph.org
Language: Java
License: NOASSERTION
License Family: other
Topics: graph-database, tinkerpop, gremlin, hbase, cassandra, elasticsearch, solr, bigtable, graphdb, graph
Last push: 2026-08-18T22:22:05+00:00

## Health v2 (maintenance only)
Score: 78/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 98, release rhythm 40, longevity 100
- inputs: {"age_days": 3537, "days_push": 15, "days_rel": 663, "gap_med": 0, "n_releases_24m": 2}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 5829, forks 1218 (observed 2026-08-28T04:09:30.150294+00:00)

## What it is
JanusGraph is an open-source, distributed graph database optimized for storing and querying graphs with billions of vertices and edges across a multi-machine cluster. It natively integrates with the Apache TinkerPop stack (Gremlin query language), supports pluggable storage backends like Cassandra, HBase, Bigtable and ScyllaDB, optional full-text search via Elasticsearch/Solr/Lucene, and OLAP analytics through Apache Spark.

## Use cases
- store and query a graph with billions of vertices and edges
- run real-time graph traversals for a recommendation engine
- build a fraud detection or knowledge graph backend
- run OLAP graph analytics over a large property graph with Spark
- add full-text and geo search over graph data with Elasticsearch
- self-host a scalable graph database on Cassandra or HBase

## When to choose
- you need a massively scalable, transactional graph database that fits the TinkerPop/Gremlin ecosystem
- your graph data exceeds what a single-machine graph database can handle
- you want pluggable storage backends and optional search integration

## When to avoid
- your dataset is small enough for an embedded or single-node graph database
- you need a relational or document data model rather than a property graph
- you cannot operate a multi-node cluster with external storage backends

## Facets
- artifact type: service
- maturity: active
- function: database, search-engine, analytics, tracing
- domain: databases, big-data, microservices, analytics
- platform: jvm, cloud, self-hosted, windows
- tags: graph-database, gremlin, tinkerpop, cassandra, hbase, elasticsearch, scalable, property-graph, oltp, olap, search, docker, linux, macos

## Member repositories
- JanusGraph/janusgraph (main) score 78

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:30.150294+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:52:04.935477+00:00, confidence not recorded.
  - readme: https://github.com/JanusGraph/janusgraph (fetched 2026-08-28T04:09:30.150294+00:00, sha c68c370348bd)
  - homepage: https://janusgraph.org (fetched 2026-08-29T08:47:31.906909+00:00, sha 519870280c3f)
  - site_page: https://docs.janusgraph.org (fetched 2026-08-29T08:47:31.909701+00:00, sha 35435f32b055)
  - site_page: https://docs.janusgraph.org/getting-started/installation (fetched 2026-08-29T08:47:31.911371+00:00, sha fbf5e3c55071)
- Data as of 2026-08-30T08:39:29.467469+00:00.