YaCy is a distributed peer-to-peer web search engine and intranet search appliance.
YaCy
YaCy is free search engine software for local or organization-wide portals and a decentralized peer-to-peer web index.
About YaCy
YaCy is free software for running your own search engine. It supports local search, organization-wide search portals, and participation in a decentralized peer-to-peer web index.
Users can run it locally, define their own web index and start their own web crawl, create a portal for an intranet or shared file system, or join the peer-to-peer network where independently run devices contribute to a shared index without a central provider. In peer-to-peer mode it states that search requests are not stored.
Key features
- Run local search engine on own device
- Build organization-wide search portal with own index
- Join peer-to-peer network with shared search index
- Start own web crawl to define index
- Search intranet, web pages or shared file system
- Operate without central search provider in P2P mode
Best for: People or organizations that want to run their own search engine for local, intranet, or peer-to-peer web search.
Good for
- No central provider controls the network in peer-to-peer mode
- States no search request storage in peer-to-peer mode
- Installations can operate independently with their own index and crawl
YaCy at a glance
- Website
- yacy.net
- Category
- Privacy & Security › Private Browsers & Search
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
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YaCy FAQ
What ways can I use YaCy?
You can run it locally, build a search portal for an organization, or join the decentralized peer-to-peer search network.
What can I index for intranet search?
You can create a search portal for your intranet, web pages, or shared file system.
How does decentralization work?
In peer-to-peer mode, independently run devices contribute to a shared search index, so no single company or server controls the network.
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