Enterprise search platform featuring full-text search, hit highlighting, faceted search, real-time indexing, dynamic clustering, and rich document (e.g., Word, PDF) handling.

Apache-2.0

Java

Fess

Powerful and easily deployable Enterprise Search Server.

Apache-2.0

Java

Manticore Search

Full-text search and data analytics, with fast response time for small, medium and big data (alternative to Elasticsearch).

GPL-3.0

Docker

Typesense

Blazing fast, typo-tolerant open source search engine optimized for developer happiness and ease of use.

GPL-3.0

C++

Yacy

Peer based, decentralized search engine server.

GPL-2.0

Java

ZincSearch

Search engine that requires minimal resources (alternative to Elasticsearch).

Apache-2.0