Real-time distributed OLAP datastore for user-facing analytics at high concurrency. Apache-governed. A heavy multi-node cluster; managed ops and anomaly detection are the commercial StarTree.
Databases
Category: Databases under Data & Analytics
Real-time analytics database for sub-second queries on streaming and batch data, Apache-governed. A heavy distributed cluster to operate; managed ops and the Pivot BI console are the commercial Imply.
Real-time MPP OLAP database that queries open lakehouse tables directly. Apache-licensed, Linux Foundation-governed. A distributed cluster to run; masking and managed ops are the commercial cloud.
Real-time MPP data warehouse, MySQL-compatible and Apache-governed, built to leave cloud warehouses like Snowflake. A distributed cluster to run; SSO and managed ops sit with the commercial VeloDB.
GPLv3 modern SQL editor with a polished UI: the free Community Edition covers the common relational databases. NoSQL drivers, SSO, team workspaces, and AI sit behind the paid Ultimate edition.
Apache-licensed universal database client for 80+ relational engines, a genuinely free, no-lock-in Community Edition. NoSQL and cloud drivers, SSO, and Vault sit behind the paid PRO editions.
Fast, minimalist desktop SQL client with MIT source: free for solo use, but for-profit teams of two or more need a paid licence (or build from source). Single-maintainer project.
AI-native embedding database for RAG: runs embedded via pip or as a Docker server, with portable SQLite/Parquet storage for clean data exit. Apache-2.0, but the OSS core ships without built-in auth.
Apache-2.0 vector database in Rust for RAG and semantic search, fully self-hostable with no copyleft strings. Multi-AZ high availability, SSO, and audit logs are gated to the managed Qdrant Cloud.
AGPL-licensed context database for AI agents: persistent memory, resources, and skills via a filesystem paradigm. Governed entirely by Volcengine (ByteDance); no independent foundation.
Single-binary Go backend: embedded SQLite, real-time subscriptions, and built-in auth. No native data-at-rest encryption; disk-level encryption required for regulated workloads.
Open-source OLAP database benchmarked as the fastest for real-time analytics at petabyte scale, a self-hosted alternative to Snowflake and BigQuery with no query-based pricing.
Source-available no-code layer for existing SQL databases. Zero record limits, auto-generated REST APIs, without Airtable's per-record pricing or proprietary data lock-in.
GPL-3.0 search engine: single C++ binary with Raft clustering, vector search, and typo tolerance included at no cost. SOC 2 Type II and HIPAA verified for Typesense Cloud.
MIT-core no-code database platform: unlimited records, no per-row pricing, full relational backend. A self-hostable Airtable alternative; advanced roles and premium plugins require paid plans.
