Open-source alternatives to Gremlin

Dgraph is a distributed graph database designed to store and query highly connected data. It organizes information as nodes and edges to represent complex relationships between entities, providing a platform for managing and analyzing deeply linked datasets. The system functions as a horizontally scalable cluster that partitions data across multiple nodes to maintain performance and availability as information volume increases. It utilizes a specialized query language built for low-latency navigation of interconnected data points, allowing for the execution of complex queries across large-sca

Flyway is a database schema versioning tool and SQL migration orchestrator. It applies version-controlled schema changes to relational databases using SQL scripts and Java Database Connectivity to ensure environments remain consistent and reproducible. The tool tracks applied migration scripts in a dedicated metadata table to determine which updates require execution. It supports the synchronization of schema versions across multiple different database engines and provides integration for build systems and application frameworks to automate updates during software release processes. Capabili

A large-scale entity and relation database supporting aggregation of properties

JDBC importer for Elasticsearch THIS REPOSITORY WILL BE DELETED WITHOUT ANY FURTHER NOTICE AFTER AUG 1 2026

One database for likes, views, follows — pre-computed, served in real-time

EliasDB a graph-based database.

Liquibase is a database schema change management tool and version control system designed to track, manage, and apply versioned database modifications. It functions as a SQL migration framework and DevOps automation utility that integrates database deployments into continuous delivery pipelines and build toolchains. The system enables precise rollbacks and drift detection by recording every modification made to a database schema. It supports the definition of database changes through structured changesets in XML, YAML, or JSON, as well as raw SQL scripts, to ensure consistent deployments acro

Memgraph is an in-memory, distributed graph database designed for high-performance labeled property graph management. It utilizes a Cypher query engine for declarative data retrieval and manipulation, providing a scalable knowledge graph backend that integrates vector search and graph traversals. The system distinguishes itself as a real-time graph analytics platform, employing native C++ and CUDA implementations to execute complex network analysis and dynamic community detection on streaming data. It provides specialized support for AI integration, including GraphRAG capabilities, the constr

Microsoft Graph Engine

MongoDB Connector for Hadoop

The official MongoDB drivers for Java, Kotlin, and Scala

Redisson is a Java client library for Redis and Valkey that provides a distributed data structure library, a distributed lock manager, and a distributed MapReduce framework. It enables application instances in a cluster to share state through thread-safe collections and objects. The project implements a JCache compliant caching layer for standardized data storage and retrieval. It also functions as a probabilistic data store, providing memory-efficient structures such as Bloom filters and HyperLogLog for high-volume data membership testing. The library covers distributed state management usi

Neo4j is a native graph database management system designed to store and query highly connected data using a property-graph model. It provides an ACID-compliant transaction engine that ensures data integrity, supported by a distributed cluster architecture that maintains causal consistency across nodes. Users interact with the system through a declarative query language, which allows for complex pattern matching and path traversal without requiring manual traversal logic. The platform distinguishes itself through its hybrid approach to data retrieval, combining traditional graph-based queries

Cassandra Java Client

Co-Process for backup/recovery, Token Management, and Centralized Configuration management for Cassandra.

RDF-Centric Map/Reduce Framework and Freebase data conversion tool

Presto is a distributed SQL query engine designed for high-performance analytical processing across heterogeneous data sources. It functions as a data federation platform and massively parallel processing engine, allowing users to execute interactive queries against diverse storage systems without requiring data migration. By mapping remote metadata and structures to a unified relational namespace, it enables seamless cross-platform analysis through a standard SQL interface. The engine distinguishes itself through a pluggable connector architecture and a shared-nothing distributed processing

MongoDB River Plugin for ElasticSearch

Provides support to increase developer productivity in Java when using MongoDB. Uses familiar Spring concepts such as a template classes for core API usage and lightweight repository style data access.