AiDex
★ 34
vs
semble
★ 4.5k
AiDex vs semble
AiDex: AiDex is an MCP server that gives AI coding assistants instant access to your entire codebase through a persistent, pre-built index. It works with any MCP-compatible AI assistant and reduces context consumption for code navigation by 50-80%. Featuring Tree-sitter parsing, incremental updates, and time-based filtering.; 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.
01
TL;DR
Choose AiDex if…Instant code navigation without wasting AI context
Choose semble if…Enhancing AI agents (e.g., Claude Code, Cursor, Codex) with fast and accurate code search capabilities
02
Side-by-Side Comparison
03
Features
AiDex01Tree-sitter Parsing for accurate identifier indexing
02~50 tokens per search vs 2000+ with grep
03Persistent index surviving between sessions
04Incremental updates and time-based filtering
05Zero external dependencies with SQLite WAL mode
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
04
Use Cases
AiDex↳Instant code navigation without wasting AI context
↳Search across multiple projects with global queries
↳Track session notes and task backlog for continuous development
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
05
Best For
AiDexTrendingCode AssistantMemory & Context
sembleCode AssistantRAG / Knowledge Base
FAQ
FAQ
What is the difference between AiDex and semble?
Both AiDex and semble are in the Code Assistant category. AiDex has 34 stars, while semble has 4.5k stars.
Which is better, AiDex or semble?
The best choice depends on your use case. Choose AiDex if Instant code navigation without wasting AI context, and semble if Enhancing AI agents (e.g., Claude Code, Cursor, Codex) with fast and accurate code search capabilities.
Is AiDex free or open source?
Yes, AiDex is open source on GitHub (MIT).
Is semble free or open source?
Yes, semble is open source on GitHub (MIT).
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