Yacy is a free, open‑source search engine platform

Three deployment modes:
-P2P mode: decentralised, shared index, no central authority
-Independent search portal: define your own index and crawl targets
-Intranet search: index internal sites or shared file systems

• No search request storage; privacy‑focused design
• GDPR‑aligned: no personalised data collection, no phoning‑home
• Installation is minimal: download, extract, run the start script
• Community‑driven project with optional consulting support

A practical option for users who want control over search infrastructure without relying on centralised operators.

Note:
Be prepared to put time in learning, tweaking settings and testing. A system with a lot of ram helps, for example, the Independent Search Portal I deployed had 8GB ram allocated to Java on windows to run without issues. Under that there was EXPLOSIOOOOONS!