Best Open Source Alternatives to Sourcegraph

Turn any codebase into a queryable knowledge graph with local AST parsing, no vector store.

High-performance MCP server that indexes codebases into a persistent knowledge graph for AI coding agents.

Open-source context layer that makes coding agents faster and cheaper with codebase-specific understanding.

Open-source RAG that builds a knowledge graph of your monorepo for AI-powered code querying and editing.

Zero-dependency C++23 CLI and MCP server that gives coding agents a ranked call graph to cut token use.