ZincSearch
Search engine that requires minimal resources (alternative to Elasticsearch).
Yacy
Peer based, decentralized search engine server.
Whoogle
A self-hosted, ad-free, privacy-respecting metasearch engine.
Websurfx
Aggregate results from other search engines (metasearch engine) without ads while keeping privacy and security in mind. It is extremely fast and provides a high level of customization (alternative to SearX).
Typesense
Blazing fast, typo-tolerant open source search engine optimized for developer happiness and ease of use.
Sosse
Selenium based search engine and crawler with offline archiving.
sist2
Lightning-fast file system indexer and search tool.
SearXNG
Internet metasearch engine which aggregates results from various search services and databases (Fork of Searx).
OpenSearch
Open source distributed and RESTful search engine.
MeiliSearch
Ultra relevant, instant and typo-tolerant full-text search API.
Manticore Search
Full-text search and data analytics, with fast response time for small, medium and big data (alternative to Elasticsearch).
LibreX
Framework and javascript free privacy respecting meta search engine.
Jina
Cloud-native neural search framework for any kind of data.
Hound
Lightning fast code searching made easy.
Fess
Fess is a very powerful and easily deployable Enterprise Search Server.