Open source graph-database projects
Every project in the registry tagged graph-database, ranked by real GitHub adoption.
Cognee is the open-source AI memory platform for agents. Give your AI agents persistent long-term memory across sessions with a self-hosted knowledge graph engi
Graphs for Everyone
An open-source graph database
A distributed, fast open-source graph database featuring horizontal scalability and high availability
Graph database built for GraphRAG and multi-tenant AI apps
Unify vector search and graph traversals in one database
The ultimate RAG for your monorepo. Query, understand, and edit multi-language codebases with the power of AI and knowledge graphs
OrientDB is the most versatile DBMS supporting Graph, Document, Reactive, Full-Text and Geospatial models in one Multi-Model product. OrientDB can run distribut
Graph database optimized for fast analysis and real-time data processing. It is provided as an extension to PostgreSQL.
High-performance graph computing for scalable data analysis
A bio-inspired cognitive memory engine — a new paradigm for Graph RAG.
TerminusDB is a distributed, collaborative database designed for building, sharing, versioning, and reasoning on structured data.
A graph database that supports more than 100+ billion data, high performance and scalability (Include OLTP Engine & REST-API & Backends)
Search and browse documents and data; find the people and companies you look for.
Apache TinkerPop - a graph computing framework
SPARQL graph database
An active model wrapper for the Neo4j Graph Database for Ruby.
Lakehouse native graph engine with git-style workflows
Build fast and accurate GenAI apps with GraphRAG SDK at scale 🌟
Build complete web apps with integrated graph database
Long-term memory for AI assistants. Graph + vector store that recalls decisions, relationships, and context across sessions.
Related tags
Frequently asked questions
How many open source graph-database projects are there?
This registry tracks 21 projects tagged graph-database, with 129,848 GitHub stars between them. The most-adopted is cognee at 30,780 stars.
Are these graph-database projects free to use?
Yes — 18 of the 21 carry an explicit open-source licence across 3 distinct licences, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which graph-database project should I choose?
The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.
Are these graph-database projects still maintained?
20 of the 21 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.