🌟Free & Open-Source Graph Databases
- JanusGraph: A highly scalable, distributed graph database optimized for storing and querying graphs containing hundreds of billions of vertices and edges across multi-machine clusters. It is fully open-source under the Apache 2.0 license and governed by the Linux Foundation.
👉 Official JanusGraph Website [1, 2, 3, 4, 5] - Apache AGE: A powerful extension for PostgreSQL that introduces native graph database functionalities. It allows you to run openCypher graph queries side-by-side with traditional SQL on top of a highly reliable relational backend. It is fully free under the Apache 2.0 license.
👉 Official Apache AGE Website [1, 2, 3, 4, 5] - Memgraph: An ultra-fast, in-memory graph database built from the ground up for real-time applications and streaming data analytics. It uses the Cypher query language and is highly compatible with the Neo4j ecosystem. Its core engine is open-source under the Business Source License (BSL), which is entirely free for development and standard production use cases.
👉 Official Memgraph Website [1, 2, 3, 4, 5] - Dgraph: A native, distributed, and highly performant graph database with a GraphQL-native interface. It handles massive transactional datasets across distributed environments and utilizes the Apache 2.0 license for its standalone version.
👉 Official Dgraph GitHub / Hypermode Project [1, 2, 3, 4, 5] - ArangoDB (Community Edition): A native multi-model database that efficiently handles graphs, JSON documents, and key-value pairings within a single core engine. The Community Edition is completely free and open-source.
👉 Official ArangoDB Website [1, 2, 3, 4, 5] - NebulaGraph: A distributed, scalable, native graph database designed for super large-scale data handling with millisecond latencies. It is open-source under the Apache 2.0 license and heavily utilized in enterprise network visualization pipelines.
👉 Official NebulaGraph Website [1, 2, 3, 4]