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Best tools·RAG Frameworks·Semantic Search

Best RAG Frameworks for Semantic Search

10 RAG Frameworks tools ranked by GitHub activity, community traction, and use‑case match — as of 2026-06-01.

Ranked by signal score (GitHub stars × 0.5 + PH votes × 0.3 + use-case tag match × 0.2). Data as of 2026-06-01. How we rank →

10 tools

  1. 01

    LangChain

    LangChain

    Open-source framework for LLM applications, agents, and RAG pipelines.

    136,904Open-source
    Agent FrameworksWebsite →
  2. 02

    infiniflow

    ragflow

    RAGFlow is a leading open-source Retrieval-Augmented Generation (RAG) engine that fuses cutting-edge RAG with Agent capabilities to create a superior context layer for LLMs

    80,635Open-source
    RAG FrameworksWebsite →
  3. 03

    pathwaycom

    llm-app

    Ready-to-run cloud templates for RAG, AI pipelines, and enterprise search with live data. 🐳Docker-friendly.⚡Always in sync with Sharepoint, Google Drive, S3, Kafka, PostgreSQL, real-time data APIs, and more.

    59,502Open-source
    RAG FrameworksWebsite →
  4. 04

    run-llama

    llama_index

    LlamaIndex is the leading document agent and OCR platform

    49,545Open-source
    RAG FrameworksWebsite →
  5. 05

    mindsdb

    mindsdb

    AI Data Vault - A query engine for AI Agents to securely query data from any datasource

    39,221
    RAG FrameworksWebsite →
  6. 06

    HKUDS

    LightRAG

    [EMNLP2025] "LightRAG: Simple and Fast Retrieval-Augmented Generation"

    36,019Open-source
    RAG FrameworksWebsite →
  7. 07

    khoj-ai

    khoj

    Your AI second brain. Self-hostable. Get answers from the web or your docs. Build custom agents, schedule automations, do deep research. Turn any online or local LLM into your personal, autonomous AI (gpt, claude, gemini, llama, qwen, mistral). Get started - free.

    34,788Open-source
    RAG FrameworksWebsite →
  8. 08

    onyx-dot-app

    onyx

    Open Source AI Platform - AI Chat with advanced features that works with every LLM

    29,938
    RAG FrameworksWebsite →
  9. 09

    NirDiamant

    RAG_Techniques

    This repository showcases various advanced techniques for Retrieval-Augmented Generation (RAG) systems. Each technique has a detailed notebook tutorial.

    27,649
    RAG FrameworksWebsite →
  10. 10

    getzep

    graphiti

    Build Real-Time Knowledge Graphs for AI Agents

    26,739
    RAG FrameworksWebsite →

How we chose

Signal score weights: GitHub stars (50%), ProductHunt votes (30%), use-case tag match (20%). Minimum 4 qualifying tools per page. Only tools in published state with ≥80% data completeness included.

Full methodology →

Related

Questions

What is the best RAG Frameworks tool for Semantic Search?
Based on signal score, LangChain leads this list with 136,904 GitHub stars. It is categorized under Agent Frameworks.
How do these RAG Frameworks tools compare on price?
LangChain: Open-source. ragflow: Open-source. llm-app: Open-source. llama_index: Open-source. LightRAG: Open-source. khoj: Open-source.
Which of these tools works best with Semantic Search?
Tools with the highest use-case tag match for Semantic Search in this list: LangChain, ragflow, llm-app. Use-case match is one of three signals in our ranking; see the methodology link above for how it's weighted.
Are there open-source options in this list?
LangChain (MIT), ragflow (Apache-2.0), llm-app (MIT), llama_index (MIT), LightRAG (MIT), khoj (AGPL-3.0), graphiti (Apache-2.0).
How often is this list updated?
GitHub stats refresh weekly. ProductHunt votes refresh weekly. Pricing data refreshes daily. This page last verified 2026-06-01.