JanusGraph
What JanusGraph is
JanusGraph is a distributed graph database for storing and querying graphs across multiple machines. The project says it is optimized for graphs with hundreds of billions of vertices and edges and supports ACID or eventually consistent transactions. It describes elastic, linear scalability, data distribution and replication, multi-datacenter high availability, and hot backups. Thousands of concurrent users can execute graph traversals in real time. JanusGraph integrates with Apache TinkerPop, including Gremlin, Gremlin Server, and Gremlin Console, and supports global graph analytics through Apache Spark. Listed storage backends include Apache Cassandra, Apache HBase, Google Cloud Bigtable, Oracle BerkeleyDB, and ScyllaDB. Optional full-text, geographic, and numeric range search can use Elasticsearch, Apache Solr, or Apache Lucene. JanusGraph is open source under Apache 2.0, with all functionality free and no commercial license required. It is governed by the Linux Foundation and lists Discord, a users mailing list, Stack Overflow, and GitHub as community help channels.
Who it suits
JanusGraph suits teams building large graph databases across multiple machines, especially those using Gremlin or the listed storage and analytics integrations.
What it does well
- Free under the Apache 2.0 license.
- Supports ACID or eventually consistent transactions.
- Integrates with Gremlin and Apache TinkerPop.
- Apache Spark integration supports global graph analytics.
- Lists multiple storage backends and search integrations.
What to know first
- Self-hosted deployment is listed.
- Community help channels are listed rather than a dedicated support plan.
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| JanusGraph | All functionality is free · no commercial license required · Apache 2.0 license | Free |
As janusgraph.org lists them, read 5 Oct 2026. The maker's own page has the final word.
Getting started
- Visit the JanusGraph project website.
- Use the self-hosted deployment route on Linux.
- Connect a listed storage backend such as Cassandra, HBase, or ScyllaDB.
- Query through Gremlin using Apache TinkerPop, Gremlin Server, or Gremlin Console.
- Use community channels such as Discord, the users mailing list, Stack Overflow, or GitHub for help.
Verdict
JanusGraph offers a free, open-source option for distributed graph storage and querying, with multiple integrations and transaction choices. Its listed deployment is self-hosted, so teams should plan to operate it in their own environment.
Questions
How much does JanusGraph cost?
The JanusGraph plan is free. The project says all functionality is free and no commercial license is required.
Is JanusGraph open source?
Yes. It is licensed under Apache 2.0.
How is JanusGraph deployed?
The listed deployment is self-hosted, and Linux is among the listed platforms.
Which query language does JanusGraph use?
It integrates natively with Apache TinkerPop, including the Gremlin query language, Gremlin Server, and Gremlin Console.
What storage backends are listed?
They include Apache Cassandra, Apache HBase, Google Cloud Bigtable, Oracle BerkeleyDB, and ScyllaDB. Community-maintained adapters are also listed for Aerospike, DynamoDB, and FoundationDB.
What support channels are available?
The project lists Discord, a users mailing list, Stack Overflow, and GitHub as community help channels.
Facts from JanusGraph's own pages
- Adapters
- The site lists community-maintained storage adapters for Aerospike, DynamoDB, and FoundationDB. · janusgraph.org, 5 Oct 2026
- Analytics
- JanusGraph supports global graph analytics through its Apache Spark integration. · janusgraph.org, 5 Oct 2026
- Founded
- 2017 · janusgraph.org, 28 Sept 2026
- Governance
- JanusGraph is described as a community-driven project governed by the Linux Foundation since 2017. · janusgraph.org, 5 Oct 2026
- Indexing
- Optional full-text, geographic, and numeric range search is available through Elasticsearch, Apache Solr, or Apache Lucene. · janusgraph.org, 5 Oct 2026
- Intended use
- The project page describes JanusGraph as a graph database designed for large graphs distributed across multiple machines. · janusgraph.org, 5 Oct 2026
- License
- JanusGraph is fully open source under the Apache 2.0 license, and the site says all functionality is free with no commercial license required. · janusgraph.org, 5 Oct 2026
- Product
- JanusGraph is a distributed graph database for storing and querying graphs across a multi-machine cluster. · janusgraph.org, 5 Oct 2026
- Query interface
- It integrates natively with Apache TinkerPop, including the Gremlin query language, Gremlin Server, and Gremlin Console. · janusgraph.org, 5 Oct 2026
- Scalability
- The site describes elastic, linear scalability, data distribution and replication, multi-datacenter high availability, and hot backups. · janusgraph.org, 5 Oct 2026
- Scale
- The site says it is optimized for graphs containing hundreds of billions of vertices and edges. · janusgraph.org, 5 Oct 2026
- Storage integrations
- Listed storage backends include Apache Cassandra, Apache HBase, Google Cloud Bigtable, Oracle BerkeleyDB, and ScyllaDB. · janusgraph.org, 5 Oct 2026
- Support
- The project lists Discord, a users mailing list, Stack Overflow, and GitHub as community help channels. · janusgraph.org, 5 Oct 2026
- Transactions
- It supports ACID or eventually consistent transactions and thousands of concurrent users executing graph traversals in real time. · janusgraph.org, 5 Oct 2026
Where JanusGraph stands on Freedom251
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