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#semantic-search

Open source repositories tagged with #semantic-search, ranked by health score.

doobidoo
doobidoo/mcp-memory-service
Python
90
health

Open-source persistent memory for AI agent pipelines (LangGraph, CrewAI, AutoGen) and Claude. REST API + knowledge graph + autonomous consolidation.

1.9k
xerj-org
xerj-org/xerj
Rust
89
health

XERJ is the new way for AI to search data. Its autoindex capability activates agents to know your data without the token waste of grep and sed. One command indexes code, docs, logs and PDFs for search, RAG, security audits and agent memory, using 40x fewer tokens than grep. Elasticsearch compatible, so existing clients just work.

1.6k
codelibs
codelibs/fess
Java
89
health

Open-source, self-hosted enterprise & site search server built on OpenSearch. Crawls web / file / DB / cloud sources, 20+ languages, REST API, and AI/RAG & semantic search. Apache-2.0.

1.1k
SeekStorm
SeekStorm/SeekStorm
Rust
88
health

SeekStorm: vector & lexical search - in-process library & multi-tenancy server, in Rust.

1.9k
lovstudio
lovstudio/Ataru
Rust
88
health

High-performance AI memory retrieval for local agent history — a Rust search core (SDK / API / JSON CLI) plus a desktop GUI. Tantivy + Jieba keyword search, optional semantic recall, stable Turn/Run/Session/Project IDs.

350
lancedb
lancedb/lancedb
Rust
88
health

Developer-friendly OSS embedded retrieval library for multimodal AI. Search More; Manage Less.

11.2k
paradedb
paradedb/paradedb
Rust
88
health

One Postgres for your application data, full-text search, vector retrieval, and aggregations. Home of the pg_search extension.

9.2k
asciimoo
asciimoo/hister
Go
88
health

Your own search engine

2.2k
neomjs
neomjs/neo
JavaScript
86
health

Neo.mjs is a self-evolving software organism: a professional end-to-end AI engineering team whose cross-model swarm inhabits live apps via Neural Link, Active Hybrid GraphRAG, DreamService, and self-healing loops.

3.3k
cocoindex-io
cocoindex-io/cocoindex
Rust
86
health

Incremental engine for long horizon agents 🌟 Star if you like it!

11.4k
Perseus-Computing-LLC
Perseus-Computing-LLC/perseus-vault
Rust
81
health

Persistent, encrypted memory for AI agents: one Rust binary, one file, no cloud. 122 canonical MCP tools, hybrid recall, bi-temporal history, AES-256-GCM. Local-first, air-gap ready, MIT.

55
spectrayan
spectrayan/spector
Java
70
health

Cognitive memory backbone for AI agents. Biologically-inspired 4-tier memory, it remembers, forgets, consolidates, and forms associations across a memory graph — Hebbian co-activation, temporal chains, and entity links.

16