The best open source alternative to neo4j is ArcadeDB. If that doesn't suit you, our users have ranked more than 25 alternatives to neo4j and many of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to neo4j are SurrealDB, FalkorDB, Grafeo and Wikibase.
One DBMS that supports SQL, Cypher, Gremlin, HTTP/JSON, MongoDB and Redis. ArcadeDB is a conceptual fork of OrientDB, the first Multi-Model DBMS. ArcadeDB supports Vector Embeddings.
With an SQL-style query language, real-time queries with highly-efficient related data retrieval, advanced security permissions for multi-tenant access, and support for performant analytical workloads, SurrealDB is the next generation serverless database.
A super fast Graph Database uses GraphBLAS under the hood for its sparse adjacency matrix graph representation. Our goal is to provide the best Knowledge Graph for LLM (GraphRAG).
Grafeo is a pure-Rust, high-performance graph database that can be embedded as a library or run as a standalone database, with optional in-memory or persistent storage. Grafeo supports both LPG and RDF and all major query languages.
Wikibase is the software that runs Wikidata, but is also usable for other projects beyond that. Wikibase allows the collaborative editing of structured data on top of MediaWiki. It is optimized for graph-like, schema-poor data, not for tabular and strongly pre-structured data.
NetworkX is a Python language software package for the creation, manipulation, and study of the structure, dynamics, and functions of complex networks.
GraphStack ™ is the name for the Neo4j Enterprise open source distributions compiled and packaged from the official Neo4j Github Repository by the Graph stack.io Team.
Titan is a scalable graph database optimized for storing and querying graphs containing hundreds of billions of vertices and edges distributed across a multi-machine cluster. Titan is a transactional database that can support thousands of concurrent users executing complex graph...
Very fast SPARQL Engine, which can handle very large knowledge graphs, offers context-sensitive autocompletion for SPARQL queries, and allows combination with text search.
SPARQL and Gremlin compatible graph database that supports 50 million+ triples and powers Wikidata and Wikibase
Nebula Graph is an open-source graph database capable of hosting super large-scale graphs with billions of vertices (nodes) and trillions of edges, with milliseconds of latency. It delivers enterprise-grade high performance to simplify the most complex data sets imaginable into...
RedisGraph is a property graph database module for Redis. It is the first graph database to use linear algebra on sparse adjacency matrices to implement graph operations, which lets it achieve high performance. It understands OpenCypher queries.
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ArcadeDB supports Cypher and BOLT protocol, it can be a drop-in replacement, but also has much more: time-series, HA (replication), all for free because of its liberal Open Source license Apache2