semble
★ 4.5k
vs
codeindex
★ 249
semble vs codeindex
semble: Semble is a high-performance code search library designed for AI agents, providing instant access to precise code snippets. It offers significantly faster indexing and querying compared to transformer models, achieving 99% of their retrieval quality while running entirely on CPU without external dependencies.; codeindex: codeindex is a dependency analyzer that builds a blast-radius impact score for every file in your repo — showing which files will break if a given file changes. It also generates a symbol index mapping every function and class to its exact file and line number, so AI tools can locate any symbol in one lookup without scanning the whole codebase. Supports 12+ languages, zero required dependencies (pure Python stdlib), and five consumption modes including CLI, MCP server, and CLAUDE.md injection.
01
TL;DR
Choose semble if…Enhancing AI agents (e.g., Claude Code, Cursor, Codex) with fast and accurate code search capabilities
Choose codeindex if…Assessing refactoring risk before touching a high-impact file
02
Side-by-Side Comparison
03
Features
semble01Fast performance on CPU (indexes in ~250ms, queries in ~1.5ms)
02High accuracy (NDCG@10 of 0.854), comparable to transformer models
03Supports indexing local paths and remote Git repositories
04Functions as an MCP server for various AI agents
05Zero setup, no API keys, GPU, or external services required
codeindex01Blast-radius impact scoring: see which files break if one file changes
02Symbol index mapping every function/class to exact file and line number
0312+ language support: Python, JS/TS, Go, Ruby, Rust, Java, PHP, and more
04Five consumption modes: CLI, markdown report, MCP server, pre-commit hook, CLAUDE.md injection
05Interactive 2D/3D visualization UI with dependency matrix and treemap
04
Use Cases
semble↳Enhancing AI agents (e.g., Claude Code, Cursor, Codex) with fast and accurate code search capabilities
↳Searching local or remote codebases for specific code snippets based on natural language or code queries
↳Finding semantically similar code sections related to a given file path and line number
codeindex↳Assessing refactoring risk before touching a high-impact file
↳Providing AI coding assistants with a symbol map for faster code navigation
↳Setting up pre-commit hooks that auto-update the dependency index on each commit
05
Best For
sembleCode AssistantRAG / Knowledge Base
codeindexHidden GemEssential
FAQ
FAQ
What is the difference between semble and codeindex?
Both semble and codeindex are in the RAG / Knowledge Base category. semble has 4.5k stars, while codeindex has 249 stars.
Which is better, semble or codeindex?
The best choice depends on your use case. Choose semble if Enhancing AI agents (e.g., Claude Code, Cursor, Codex) with fast and accurate code search capabilities, and codeindex if Assessing refactoring risk before touching a high-impact file.
Is semble free or open source?
Yes, semble is open source on GitHub (MIT).
Is codeindex free or open source?
Yes, codeindex is open source on GitHub (NOASSERTION).
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