Yacy
Peer based, decentralized search engine server.
Maintained, but at a slower pace than the leaders in its category.
Commit activity more than 44% of tracked projects; popularity more than 63%. How this is calculated.
Commits, last 11 months
| Stars | 4k |
|---|---|
| Latest release | — |
| Repo updated | 23 Sept 2026 |
| Licence | GPL-2.0 |
| Built with | Java, Docker, K8S |
Is Yacy actively maintained?
Yacy is under active development: 206 commits landed over the last 11 months, averaging roughly 23 commits a month in the most recent quarter.
Activity is accelerating: the last quarter carried 74% more commits than the one before it.
No tagged releases are published, so there is no stable version to pin to — you would deploy from the default branch or a container image built from it.
Yacy ranks #10 of 16 in Search Engines, placing it mid-table for maintenance activity.
What Yacy actually does
YaCy is a decentralised, peer-to-peer search engine server built to index and retrieve web content without relying on a central authority. It operates as part of a distributed network where nodes share index data with each other. The project is implemented in Java and is available under the GPL-2.0 licence.
Best fit: It is suited for technical users who want to experiment with distributed information retrieval or operate an independent search index outside of commercial providers.
Worth knowing: Peer-to-peer architectures often require significant bandwidth and computational resources to synchronise indices, and discovery quality can lag significantly behind traditional centralised indexers.
Deployment notes
Container images for Docker and Kubernetes configurations are available, and you will typically need to allocate persistent storage for the search index data along with a reverse proxy to handle TLS termination.
Links
Alternatives to Yacy
Projects in the same categories, ordered by health score.
Distributed, RESTful search and analytics engine.
Ultra relevant, instant and typo-tolerant full-text search API.
Distributed and RESTful search engine.
Full-text search and data analytics, with fast response time for small, medium and big data (alternative to Elasticsearch).
Internet metasearch engine which aggregates results from various search services and databases (Fork of Searx).
Personal web search engine with automatic indexing of visited websites. Supports offline local result previews, local files, multi-user handling and optional semantic search.