Search Engines

Search engines power instant, typo-tolerant full-text search across documents, products, and content. Modern search goes beyond keyword matching — it includes faceted filtering, geo-search, AI-powered semantic search, and federated queries across multiple indices. Self-hosted search engines give teams full control over their data and search relevance tuning without relying on cloud-only services.

Open-source search engines:

Meilisearch — fast, typo-tolerant search with instant results. Simple REST API, easy setup. Supports faceting, filtering, and AI-powered hybrid search. Written in Rust. MIT.

Typesense — typo-tolerant search engine optimized for speed. In-memory storage for sub-millisecond results. Supports geo-search, faceting, and vector search. Written in C++. GPL v3.

OpenSearch — community-driven fork of Elasticsearch (post-license-change). Full-featured search and analytics suite with dashboards. Scales to petabytes. No feature gating. Apache 2.0.