semble
★ 4.5k
vs
restheart
★ 876
semble vs restheart
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.; restheart: RESTHeart exposes your data through a native MCP server and full REST and GraphQL APIs, so AI agents and developers can read and write without custom integration code. It ships with authentication, authorization, and a plugin system for custom business logic. Available as Docker image and GraalVM native binary.
01
TL;DR
Choose semble if…Enhancing AI agents (e.g., Claude Code, Cursor, Codex) with fast and accurate code search capabilities
Choose restheart if…AI agent backends: give agents production-grade MongoDB backend via MCP
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
restheart01Native MCP Server for AI agents
02Full REST API with CRUD, aggregation, filtering, sorting, pagination
03GraphQL API with schema-driven mapping to MongoDB queries
04WebSocket for real-time change streams and data sync
05Plugin system for custom business logic with Java, JavaScript, Kotlin, or TypeScript
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
restheart↳AI agent backends: give agents production-grade MongoDB backend via MCP
↳API development without boilerplate
↳Real-time applications: WebSocket and SSE for chat, notifications, and live dashboards
05
Best For
sembleCode AssistantRAG / Knowledge Base
restheartAPI IntegrationData Processing
FAQ
FAQ
What is the difference between semble and restheart?
Both semble and restheart are in the RAG / Knowledge Base category. semble has 4.5k stars, while restheart has 876 stars.
Which is better, semble or restheart?
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 restheart if AI agent backends: give agents production-grade MongoDB backend via MCP.
Is semble free or open source?
Yes, semble is open source on GitHub (MIT).
Is restheart free or open source?
Yes, restheart is open source on GitHub (AGPL-3.0).
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