ZincSearch is a Go-based, lightweight search engine for full-text indexing with Elasticsearch API-compatible ingestion, a Vue UI, and a schema-less document model.

17.9k stars775 forkslast commit Actively maintained
Hosted site search by Yandex that provides website owners with a customizable search box and results pages, cloud-based crawling and indexing of site content, relevance ranking and tuning, and APIs/widgets to embed search on websites.
ZincSearch is a Go-based, lightweight search engine for full-text indexing with Elasticsearch API-compatible ingestion, a Vue UI, and a schema-less document model.

17.9k stars775 forkslast commit Actively maintained
YaCy is a self-hostable search engine with crawler and indexing, supporting decentralized P2P search, standalone search portals, and intranet/file search.
4k stars495 forkslast commit Actively maintained
Scalable enterprise search platform supporting full-text, vector, faceted and geospatial search with SolrCloud clustering and a web admin UI.

1.7k stars859 forksApache-2.0last commit Actively maintained
sist2 is a fast, low-memory file system indexer with a web UI for searching file contents and metadata, with Elasticsearch or SQLite backends.
1.3k stars78 forksGPL-3.0last commit Actively maintained
Fess is an open-source enterprise search server with a built-in crawler, web-based administration, and OpenSearch/Elasticsearch-backed full-text search.

1.1k stars175 forksApache-2.0last commit Actively maintained
Every option on this page is open source and free to run on your own hardware, so you own the data and there is no subscription to cancel. 5 of 5 shipped a commit in the last six months. Licences in this list: Apache-2.0, GPL-3.0. In exchange you take on hosting, backups and updates yourself.
Browse everything in Search & Indexing Engines.