Database Systems

Distributed search and analytics engine with an open-source core and additional license options.

ClickHouse® is a real-time analytics database management system

YDB is an open source Distributed SQL Database that combines high availability and scalability with strong consistency and ACID transactions

YTsaurus is a scalable and fault-tolerant open-source big data platform.

DuckDB is an analytical in-process SQL database management system

Turso is an in-process SQL database, compatible with SQLite.

🔎 Open source distributed and RESTful search engine.

The open-source reactive database for app developers

Harper is an open-source Node.js performance platform that unifies database, cache, application, and messaging layers into one in-memory process.

Milvus is a high-performance, cloud-native vector database built for scalable vector ANN search

Event streaming platform for agentic AI. Continuously ingest, transform, and serve event streams in real time, at scale.

Simple, Elastic-quality search for Postgres

HelixDB is an OLTP graph-vector database built in Rust.

A portable accelerated SQL query, search, and LLM-inference engine, written in Rust, for data-grounded AI apps and agents.

Qdrant - High-performance, massive-scale Vector Database and Vector Search Engine for the next generation of AI. Also available in the cloud https://cloud.qdrant.io/

A modern replacement for Redis and Memcached

The world's fastest open query engine for sub-second analytics both on and off the data lakehouse. With the flexibility to support nearly any scenario, StarRocks provides best-in-class performance for multi-dimensional analytics, real-time analytics, and ad-hoc queries. A Linux Foundation project.

ArcadeDB Multi-Model Database, 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.

A flexible distributed key-value database that is optimized for caching and other realtime workloads.

Development at the speed of light

Official repository of Trino, the distributed SQL query engine for big data, formerly known as PrestoSQL (https://trino.io)

LadybugDB a graph database

A fast, local first, reactive Database for JavaScript Applications https://rxdb.info/

Search engine and full-text search database.

CrateDB is a distributed and scalable SQL database for storing and analyzing massive amounts of data in near real-time, even with complex queries. It is PostgreSQL-compatible, and based on Lucene.

SIMD-accelerated columnar database for analytics.

High-performance, scalable time-series database designed for Industrial IoT (IIoT) scenarios

QuestDB is a high performance, open-source, time-series database

Community-developed open-source relational database server derived from MySQL.

TiDB is built for agentic workloads that grow unpredictably, with ACID guarantees and native support for transactions, analytics, and vector search. No data silos. No noisy neighbors. No infrastructure ceiling.

TypeScript implementation of the DXOS protocols, SDK, toolchain and Composer.

An immutable SQL database for application development, time-travel reporting and data compliance. Developed by @juxt

Distributed reliable key-value store for the most critical data of a distributed system

Infinispan is an open source data grid platform and highly scalable NoSQL cloud data store.

Open source, cloud native, Postgres platform with copy-on-write branching and scale-to-zero

The First Distributed Real-Time Search Analytics Database

Read-path sync engine for Postgres that handles partial replication, data delivery and fan-out.

Durable Streams API

SDK that enables local-first and real-time reactive apps with embedded SQLite for JavaScript clients, including React Native and Web

🦔 Fast, lightweight & schema-less search backend. An alternative to Elasticsearch that runs on a few MBs of RAM.

Open-source relational database server and MySQL Cluster codebase.

Open Source realtime backend in 1 file

Embedded SQL database engine distributed as public-domain source.

Data API builder provides modern REST, GraphQL endpoints and MCP tools to your Azure Databases and on-prem stores.

Embeddable Postgres with real-time, reactive bindings.

Cognitive memory database for AI agents — consolidates duplicates, detects contradictions, fades stale memories via temporal decay. Rust, AGPL, ships as library / MCP server / HTTP cluster.

Graph database optimized for fast analysis and real-time data processing. It is provided as an extension to PostgreSQL.

Open Source alternative to Algolia + Pinecone and an Easier-to-Use alternative to ElasticSearch ⚡ 🔍 ✨ Fast, typo tolerant, in-memory fuzzy Search Engine for building delightful search experiences

Graph database platform

Open-source machine learning database for consistent features across training and inference.

TerminusDB is a distributed, collaborative database designed for building, sharing, versioning, and reasoning on structured data.

Scalable datastore for metrics, events, and real-time analytics

A distributed SQLite server with MySQL wire compatible interface

Collection of open source databases built on a common storage foundation.

Cloud native full text search

Backend server with REST APIs for core backend needs.

PostgreSQL reengineered for multi-tenant apps

Serverless Postgres database

Serverless MySQL platform

Embedded SQL OLAP in C++. Live views that re-parse only the bytes your CSVs grew by. Reads Parquet/CSV/JSON/Avro/Arrow/SQLite natively. 3.9× DuckDB on a 5-query warm batch. MIT.

GridDB is a next-generation open source database that makes time series IoT and big data fast,and easy.