BenchRank
#6 in AI Search & ResearchUpdated 2026-08

YaCy

by YaCy · Self-hosted search engine software with a peer-to-peer index

33.5 — BenchRank score out of 100

Screenshots of YaCy

  • Homepage

Homepage · YaCy

Homepage of YaCy

Overview

YaCy is free search engine software that you install and run yourself. It can search a local or shared file system and an intranet, act as a self-defined crawler and search portal for an organisation, or join a peer-to-peer network in which many independently run devices contribute to a shared index. It collects no personalised data and has no phone-home.

Best for
Organisations and individuals wanting to run their own search index instead of using a hosted engine.
Pricing
The captured page describes YaCy as free software and shows no prices; it asks for donations and links to Patreon and GitHub Sponsors, and mentions paid-unstated consulting.

Strengths and trade-offs

Strengths

  • Free software you install and run on your own machines
  • Covers local, intranet and organisation-wide search portals
  • P2P mode shares an index across independently run peers
  • No personalised data collection and no phone-home

Trade-offs

  • You must host the software and run your own crawl to build an index
  • The project depends on donations and community contributions
  • Captured pages give no detail on setup effort or hardware requirements

How this score is made up

Each dimension is scored out of 100 and combined into the headline score using fixed weights.

MCP support
0 out of 100
Documentation
60 out of 100
Agent friendliness
65 out of 100
Changelog
0 out of 100
Marketing site structure
60 out of 100
Operational trust
15 out of 100

Measured, but not part of the score

Useful to know, but not a mark for or against the product — so these do not affect the ranking.

Openness
30 out of 100
Maintenance
85 out of 100

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