Companies in the category 'Database'
These are companies that provide an open source database for storing and managing structured or unstructured data.
Open-source fast database for search
Manticore Software Ltd. develops Manticore Search, an open-source database forked from Sphinx Search in 2017 and written in C++. It offers full-text search, vector search, and multi-model storage (row-wise and columnar) with MySQL-compatible SQL and JSON APIs. The company generates revenue through support subscriptions, professional services, and feature engineering around its open-source core.
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Database DevOps tools and solutions
Redgate Software provides database DevOps solutions that help organizations manage, develop, and deploy database changes across SQL Server, Oracle, PostgreSQL, and other platforms. Its tools cover database monitoring, schema migrations, test data management, and compliance, enabling teams to automate and streamline the full database development lifecycle.
Distributed relational database for HTAP
OceanBase is an open-source distributed relational database developed by Ant Group, designed for mission-critical workloads at any scale. It supports hybrid transaction and analytical processing (HTAP) with a single engine, offering high availability, elastic scalability, and strong compatibility with MySQL, while delivering record-setting TPC-C and TPC-H benchmark performance.
Open-source MongoDB alternative on Postgres
FerretDB is an open-source proxy that converts MongoDB wire protocol queries to SQL, using PostgreSQL or SQLite as the database backend. It enables developers to use MongoDB drivers, tools, and query language while avoiding vendor lock-in and proprietary licensing. FerretDB Inc. offers product support, custom feature development, and consulting services for enterprise teams adopting FerretDB.
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Check out COSS Weekly on the webObservability DB for metrics, logs, and traces
Greptime builds GreptimeDB, an open-source observability database designed around the Observability 2.0 paradigm. Rather than treating metrics, logs, and traces as separate pillars requiring separate systems, GreptimeDB stores all three signal types as unified wide events in a single columnar engine backed by object storage. Built on Rust and Apache DataFusion, it offers native PromQL and SQL query support, OpenTelemetry compatibility, and compute-storage separation for scalable, cost-efficient deployments.
High-performance in-memory data store
Dragonfly is an in-memory data store built for modern application workloads, offering full API compatibility with Redis, Valkey, and Memcached. Its multi-threaded architecture delivers up to 25x more throughput than Redis and can run on up to 80% fewer resources, making it well-suited for high-scale caching, feature stores, and job queues. Dragonfly is available as an open-source project under the Business Source License and as a fully managed cloud service called Dragonfly Cloud.
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IndexedDB wrapper with cloud sync
Dexie is a JavaScript wrapper library for IndexedDB, the built-in browser database, designed to make offline-first web application development simple and accessible. Through Dexie Cloud, the company offers a managed cloud service that adds real-time synchronization, authentication, and collaboration capabilities to Dexie.js applications without requiring any backend setup.
Distributed SQL database with AI features.
YDB is a distributed SQL database designed to handle large-scale workloads with high availability and consistency. It is built on technologies that enable horizontal scalability and strong consistency, making it suitable for enterprise applications. YDB primarily serves enterprise customers.
Elasticsearch alternative built on Postgres
ParadeDB provides a modern Elasticsearch alternative built on Postgres that is built for real-time, update-heavy workloads.
Web performance platform for data-intensive apps.
Harper fuses database, cache, messaging, and application functions into a single process — delivering performance and simplicity for data-intensive, latency-sensitive applications. It enables enterprises to achieve significant savings and increased API call speeds.
Open-source no-code database and application builder
Baserow is an open-source no-code database tool and Airtable alternative that enables teams to create databases and applications without technical experience. The platform combines the ease of use of a spreadsheet with the power of a database, offering real-time collaboration, custom app building, and API-first architecture for workflow automation.
Universal database tool
DBeaver is a free multi-platform database tool for developers, database administrators, analysts and all people who need to work with databases.
Database management in a single PHP file.
Adminer is a database management tool that comes in a single PHP file. It supports various database systems including MySQL, MariaDB, PostgreSQL, CockroachDB, SQLite, MS SQL, and Oracle. It focuses on security, user experience, performance, and features.
Smart Edge Databases with Cloud Sync and Intell...
SQLite AI builds advanced AI infrastructure on top of SQLite, transforming it into a powerful, lightweight AI engine for intelligent, edge-native applications. Their mission is to enable private, local, and secure AI workloads on any device, combining SQLite's ubiquity with edge-native AI.
Fullstack database with real-time sync.
Triplit is an open-source database that syncs data between server and browser in real-time. It provides live updating queries, offline support, and code-first schemas, enabling developers to build fast, reactive applications.

