Local-first search engine and MCP server for AI agents. One Rust binary indexes code, docs, logs, JSONL/CSV and PDFs for BM25 full-text, vector and hybrid search, code search without grep, agent memory and RAG. Elasticsearch-compatible API; Corpus Hub serves hundreds of reference memory corpora.

Open-source, self-hosted enterprise & site search server built on OpenSearch. Crawls web / file / DB / cloud sources, 20+ languages, REST API, and AI/RAG & semantic search. Apache-2.0.

Django BM25 full-text search using PostgreSQL - a lightweight Elasticsearch alternative

Modern in-engine alternative to Elasticsearch & OpenSearch for PostgreSQL. Fuses vertical HNSW vector indexes with native length-normalized BM25 full-text search in a single SQL query. 100% local CPU ONNX inference (zero API tokens), 85% less RAM, 3.2× lower latency.

Distributed Zero-CDC Search Engine & Document Store powered by Multi-Store Raft consensus — eliminating dual-writes, Kafka/Debezium pipelines, and Elasticsearch lag

Advanced multi-backend search management for Craft CMS with BM25 ranking, fuzzy matching, and multi-language support. Supports MySQL, PostgreSQL, Redis, File, Algolia, Meilisearch, and Typesense backends.

ZincSearch: lightweight Go search engine, Elasticsearch alternative with full-text indexing and built-in UI

One Postgres container that replaces MongoDB, Redis/RabbitMQ, Elasticsearch, Pinecone, PostGIS, a time-series DB, Snowflake, and a hand-written API layer — provisioned and orchestrated by a single Go binary.

Typesense indexer for Magento 2 — catalog to documents, schema policy, connection config, alias-swap reindex

In-memory full-text search for MySQL with GTID binlog auto-sync and CJK n-gram support. Orders of magnitude faster than FULLTEXT.

ParadeDB — independent third-party profile of a public API surface, by API Evangelist. ParadeDB is an open-source Postgres extension stack (pg_search for BM25 full-text search and pg_analytics for columnar OLAP) that turns PostgreSQL into a real-time search and analytics engine, positioned as an Elasticsearch alternative.

👻 Sub-millisecond client-side full-text search engine. Zero server. Replaces Algolia.

Typesense search engine for Magento 2 — drop-in OpenSearch/Elasticsearch replacement (search, facets, layered nav)