Open source. Open possibilities.

SearXNG is a free, privacy-respecting metasearch engine that aggregates results from multiple search services and databases without tracking or profiling users.

Elasticsearch is a distributed, RESTful search and analytics engine and vector database. It supports full-text, vector, and hybrid search, logs, metrics, APM, security analytics, and RAG use cases. Includes quick local Docker setup, APIs, and Kibana.

A high-performance Go implementation of the rHEALPix Discrete Global Grid System (DGGS) for memory-efficient spatial indexing and geospatial data management.

A Docker Compose template for running the Elastic stack (Elasticsearch, Logstash, Kibana) locally, aimed at easy exploration rather than production deployment.

Microservice crystal structure search using COD data, built with TypeScript, Node.js, Express, React, MongoDB, Redis, RabbitMQ, Docker Swarm, and Traefik for fast substructure queries and a server‑rendered web UI.

Dataview is an Obsidian plugin that turns your vault into a queryable database. It extracts metadata from Markdown frontmatter and inline fields, then provides a pipeline-based query language (DQL) and a JavaScript API for filtering, sorting, and visualizing notes.

mq-db is a Rust-based embedded database that treats Markdown as a structured, hierarchical store with interval indexing, supporting SQL and mq queries, full-text search, and write‑back editing.

PixelRAG renders documents as screenshots and retrieves over images directly, preserving visual structure like tables and charts that text parsing loses. Includes a hosted 8.28M-page Wikipedia index, CLI tools, and Claude Code integration.

Morphic is an AI-powered search engine with a generative UI that renders rich inline components from streamed JSON specs, supporting multiple AI and search providers, chat history, auth, and Docker deployment.

Official Python SDK and CLI for the DiscoLike API — a business web search engine indexing 80M+ websites. Discover target accounts, match company names to domains, enrich lists, and find contacts from Python or the terminal.

Python library for on-device AI data infrastructure, offering quantized image/text embedding providers, batch indexing for images, videos and documents, incremental clustering, semantic search and few-shot classification.

Typesense is a fast, typo-tolerant, in-memory fuzzy search engine designed as an open-source alternative to Algolia and a simpler alternative to Elasticsearch.

lore is a Bun-based command line tool that mirrors Claude Code's local transcripts into an archive, indexes them with SQLite FTS5, and serves a local web explorer for searching sessions and profiling token usage.

A Python library and CLI tool for searching the SLB Energy Glossary in English and Spanish, featuring live site scraping, local SQLite caching, and semantic search capabilities.

Arkime is a large-scale, open-source network analysis and packet capture system for storing and indexing network traffic in PCAP format.

PageIndex is a vectorless, reasoning-based RAG engine that builds hierarchical tree indexes for long documents and lets an LLM reason through the tree to retrieve relevant sections, avoiding vector databases and chunking.

A lightning-fast search engine API providing AI-powered hybrid search, typo tolerance, and search-as-you-type capabilities for websites and applications.