
TerminusDB is an open-source document graph database designed for developers, offering a multi-model and distributed architecture. It features Git-like collaboration for data management, allowing users to branch, merge, and track changes effectively. With a focus on low memory overhead and scalable solutions, TerminusDB supports AI applications through its semantic indexer, Vector Link. The platform provides flexible schema design, portable data storage in JSON format, and API-first connectivity, making it suitable for complex, relationship-aware applications. Its unique capabilities position it as a competitive player in the database market, catering to developers seeking innovative data solutions.

TerminusDB is an open-source document graph database designed for developers, offering a multi-model and distributed architecture. It features Git-like collaboration for data management, allowing users to branch, merge, and track changes effectively. With a focus on low memory overhead and scalable solutions, TerminusDB supports AI applications through its semantic indexer, Vector Link. The platform provides flexible schema design, portable data storage in JSON format, and API-first connectivity, making it suitable for complex, relationship-aware applications. Its unique capabilities position it as a competitive player in the database market, catering to developers seeking innovative data solutions.
Product: Open-source graph/document database with WOQL query language and Git-like revision control (branch/merge/time-travel)
Founded / HQ: 2017; Dublin, Ireland
Funding (latest): Seed on 2021-03-15; total funding reported as 5,490,000.00 USD
Founders: Gavin Mendel-Gleason and Kevin Feeney
Technical highlights: WOQL, JSON portable storage, semantic indexer (Vector Link), API-first and low-memory in-memory architecture
Versioned, relationship-aware data management for developer teams; collaboration and CI/CD-style workflows for data; supporting AI applications that require semantic indexing and vector capabilities.
2017
Database software
“Investors include Volta Ventures, Enterprise Ireland, Acequia Capital (AceCap), Atlantic Bridge University Fund”