barbacane
★ 27
vs
semble
★ 4.5k
barbacane vs semble
barbacane: Barbacane is a spec-driven API gateway built in Rust. It uses OpenAPI/AsyncAPI specs as configuration, compiles them into sealed artifacts, and provides routing, validation, authentication, AI traffic management, and MCP support. It features fast performance, security by default, and an extensible plugin system.; 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 barbacane if…API gateway for microservices with spec-driven routing and validation
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
barbacane01Spec as config — your OpenAPI/AsyncAPI spec is the single source of truth
02Fast and predictable — Rust, Tokio, and Hyper, with route lookup in ~83 ns
03Secure by default — memory-safe runtime, TLS via Rustls, sandboxed WASM plugins
04AI gateway built-in — unified LLM routing with provider fallback and dedicated middlewares
05MCP from your spec — every operation is automatically exposed as a Model Context Protocol tool
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
barbacane↳API gateway for microservices with spec-driven routing and validation
↳AI proxy to unify multiple LLM providers with fallback and policy enforcement
↳Expose existing OpenAPI specs as MCP tools for AI agents
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
barbacaneTrendingSecurity & SafetyAPI Integration
sembleCode AssistantRAG / Knowledge Base
FAQ
FAQ
What is the difference between barbacane and semble?
Both barbacane and semble are in the Dev Tooling category. barbacane has 27 stars, while semble has 4.5k stars.
Which is better, barbacane or semble?
The best choice depends on your use case. Choose barbacane if API gateway for microservices with spec-driven routing and validation, and semble if Enhancing AI agents (e.g., Claude Code, Cursor, Codex) with fast and accurate code search capabilities.
Is barbacane free or open source?
Yes, barbacane is open source on GitHub (AGPL-3.0).
Is semble free or open source?
Yes, semble is open source on GitHub (MIT).
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