Bitsy

A small, embeddable, durable in-memory property graph database implementing Apache TinkerPop3 (Gremlin), with ACID transactions and optimistic concurrency control aimed at multi-threaded OLTP workloads. It persists data to human-readable JSON transaction logs and runs in-process or behind Gremlin Server.

Visit website GitHub 150 stars

Overall rank: #96
First released: July 2013
License: Apache-2.0
Built with: Java

Details

Vendor: LambdaZen
Type: Property Graph
Kind: Embedded
Category: Emerging
License: Apache-2.0
Language: Java
Query Languages: Gremlin
Protocols: Gremlin (WebSocket)

Sources 5 references

Protocols Gremlin (WebSocket)

Primarily an embedded Tinkerpop3 library; can also be loaded into Gremlin Server for remote/network access.

Bitsy is a small, fast, embeddable, durable in-memory graph database that implements Apache Tinkerpop.
Home · lambdazen/bitsy Wiki · GitHub · reviewed 2026-08-02
You can run Bitsy in the Gremlin Server as follows:
Home · lambdazen/bitsy Wiki · GitHub · reviewed 2026-08-02

License Apache-2.0

SPDX identifier as classified by GitHub from the repository licence file.

"spdx_id": "Apache-2.0"
GitHub licence API — lambdazen/bitsy · reviewed 2026-08-02

Released 2013-07

Refined the current year-only value: Bitsy 1.0 was announced on the Gremlin-users mailing list on 19 Jul 2013, well before the GitHub repo (which hosts the later Tinkerpop3-compatible v3 rewrite) was created in 2017.

I am happy to announce the 1.0 version of the Bitsy graph database. The released version supports Tinkerpop/Blueprints 2.3.0.
Announcing Bitsy 1.0 version · reviewed 2026-08-02

Language Java

Confirms current value; Bitsy is a Maven/Java project distributed on Maven Central.

The project **build time requirement** is [Apache Maven](https://maven.apache.org/), at least version 3.9 and Java 21. The project **run time requirement is Java 8**.
README.md · reviewed 2026-08-02