Hybrid Retrieval Optimization RAG Tools

Tools and pipelines that improve RAG retrieval accuracy through multi-stage search strategies (combining semantic, keyword, and reranking methods), contextual enhancement, and retrieval optimization techniques. Does NOT include general RAG frameworks, embedding model training, or LLM generation components in isolation.

There are 83 hybrid retrieval optimization tools tracked. 1 score above 50 (established tier). The highest-rated is denser-org/denser-retriever at 51/100 with 294 stars and 22 monthly downloads.

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#	Tool	Score	Tier	Stars	Language
1	denser-org/denser-retriever An enterprise-grade AI retriever designed to streamline AI integration into...	51	Established	294	Python
2	rayliuca/T-Ragx Enhancing Translation with RAG-Powered Large Language Models	44	Emerging	95	Python
3	neuml/rag 🚀 Retrieval Augmented Generation (RAG) with txtai. Combine search and LLMs...	40	Emerging	445	Python
4	NovaSearch-Team/RAG-Retrieval Unify Efficient Fine-tuning of RAG Retrieval, including Embedding, ColBERT,...	39	Emerging	1,103	Python
5	daved01/ragcore A library to build retrieval-augmented generation apps with just a few lines of code.	38	Emerging	4	Python
6	RulinShao/retrieval-scaling Official repository for "Scaling Retrieval-Based Langauge Models with a...	38	Emerging	224	Python
7	Trae1ounG/DyPRAG [arxiv: 2503.23895] Dynamic Parametric Retrieval Augmented Generation for...	36	Emerging	172	Python
8	MozerWang/Loong [EMNLP 2024 (Oral)] Leave No Document Behind: Benchmarking Long-Context LLMs...	36	Emerging	149	Python
9	target-benchmark/target TARGET is a benchmark for evaluating Table Retrieval for Generative Tasks...	35	Emerging	28	Jupyter Notebook
10	mangopy/SearchLM Official code for NeurIPS2025 "Iterative Self-Incentivization Empowers Large...	35	Emerging	225	Python
11	PranavMishra17/Metadata-Enrichment-with-LLMs-for-RAGs-Internal-Knowledge-Retrieval A comprehensive framework for enhancing Retrieval-Augmented Generation (RAG)...	35	Emerging	2	Python
12	OpenProteinAI/PoET-2 Code and model weights for PoET-2, a retrieval-augmented multimodel protein...	33	Emerging	22	Python
13	zorazrw/filco [Preprint] Learning to Filter Context for Retrieval-Augmented Generaton	33	Emerging	196	Python
14	mangopy/direct-rag-learning Official code for TOIS2026 "Direct Retrieval-augmented Optimization:...	32	Emerging	276	Python
15	brishtiteveja/ReferenceRAG REFRAG - An implementation of the REFRAG paper from Meta Superintelligence Labs	32	Emerging	3	Jupyter Notebook
16	reichenbch/RAG-examples Retrieval Augmented Generation Examples - Original, GPT based, Semantic Search based.	31	Emerging	60	Jupyter Notebook
17	nju-websoft/DraCo Dataflow-guided retrieval augmentation for repository-level code completion,...	31	Emerging	34	Python
18	ictnlp/LevelRAG The official implementation of "LevelRAG: Enhancing Retrieval-Augmented...	31	Emerging	51	Python
19	HSLiu-Initial/CtrlA This includes the original implementation of CtrlA: Adaptive...	30	Emerging	65	Jupyter Notebook
20	CyberAgentAILab/RALF [CVPR 2024 Oral] Official repository for RALF: Retrieval-Augmented Layout...	29	Experimental	143	Python
21	Mehdiazarafza/UAV-RAG This repository explores the integration of Large Language Models (LLMs)...	28	Experimental	8	—
22	mytechnotalent/rea A Reverse Engineering Assistant leveraging Retrieval-Augmented Generation...	28	Experimental	36	Jupyter Notebook
23	ovitrac/RAGGAE 📚 RAGGAE: Retrieval-Augmented Generation architecture for enterprise –...	28	Experimental	1	Python
24	fusion-jena/information-retrieval-using-multiple-LLM-and-RAG Information Retrieval using Multiple LLMs and RAG	26	Experimental	4	TeX
25	yhoshi3/RaLLe RaLLe: A Framework for Developing and Evaluating Retrieval-Augmented Large...	26	Experimental	55	Python
26	JustinHsu1019/general-rag-template Template for building a High-Accuracy Retrieval-Augmented Generation (RAG)...	26	Experimental	5	Python
27	VodLM/vod End-to-end training of Retrieval-Augmented LMs (REALM, RAG)	26	Experimental	23	Python
28	taherfattahi/embedding-optimizer Two approaches to generating optimized embeddings in the Retrieval-Augmented...	26	Experimental	5	Python
29	hypermind-co/contextual-retrieval Enhance your RAG with Contextual Retrieval	25	Experimental	5	Python
30	harinaralasetty/CORAG A highly contextualized retrieval system integrating Large Language Models...	25	Experimental	27	Python
31	legobridge/retrieval-augmented-generation A proof-of-concept of retrieval-augmented generation, using Google's PaLM API.	24	Experimental	2	Python
32	gtfintechlab/ACLReady ACLReady, a retrieval-augmented language model application that can be used...	23	Experimental	6	TeX
33	panruotong/CAG Implementation of Not All Contexts Are Equal: Teaching LLMs...	23	Experimental	22	Python
34	Pro-GenAI/iRAT 🔄 Replanning and Controlled Retrieval for Robust LLM Reasoning	23	Experimental	8	Jupyter Notebook
35	rpo19/ReFactX ReFactX: Scalable Reasoning with Reliable Facts via Constrained Generation	22	Experimental	—	Jupyter Notebook
36	bnarasimha21/rag-demo Demo app showcasing Retrieval-Augmented Generation with vector search	22	Experimental	—	Python
37	NoliNobdon/TriStage-RAG 🎯 Optimize retrieval with TriStage-RAG, a 3-stage pipeline that enhances...	22	Experimental	—	Python
38	18907305772/MAKER ACL'2023: Multi-Grained Knowledge Retrieval for End-to-End Task-Oriented Dialog	22	Experimental	9	Python
39	Debrup-61/RaDeR Official Code Repositiry for "RaDeR: Reasoning-aware Dense Retrieval Models"...	22	Experimental	16	Python
40	antononcube/Raku-LLM-RetrievalAugmentedGeneration Raku package for doing LLM Retrieval Augmented Generation (RAG).	22	Experimental	4	Raku
41	somewheresystems/dataclysm Pull high-quality, efficient embeddings for PubMed, arXiv and Wikipedia from...	22	Experimental	47	Jupyter Notebook
42	VashuTheGreat/Multi-Rag Multi source Retrieval Augmented Generation system using vector databases and LLMs.	22	Experimental	—	Jupyter Notebook
43	GokayGulsoy/Information-Retrieval-and-Modern-NLP Repository for the CENG543 (Information Retrieval and Modern NLP)	22	Experimental	—	—
44	kusp-dev/retrieval-weight-experiment Gradient-Free Retrieval Weight Learning via Thompson Sampling with LLM...	22	Experimental	—	Python
45	sharif-ml-lab/IMDb-IR-System IMDb IR System Project - MIR Course - Spring 2024	20	Experimental	4	Jupyter Notebook
46	abe238/volatility-driven-decay Adaptive memory retention for RAG systems. VDD dynamically adjusts decay...	19	Experimental	—	Python
47	GokayGulsoy/Benchmarking-Retrieval-Supported-Large-Language-Models-for-Open-Domain-Question-Answering Repository for the CENG543 Course Information Retrieval Term Project	19	Experimental	—	Python
48	ml-jku/RA-DT Retrieval-Augmented Decision Transformer: External Memory for In-context RL	19	Experimental	24	Python
49	AINexumLab/slm-rag Retrieval-Augmented Generation (RAG) for Small Language Models (SLMs)	19	Experimental	—	Jupyter Notebook
50	Farjad258/rag-pipeline-evaluation-faiss-hybrid-chunking Reproducible evaluation of Retrieval-Augmented Generation (RAG) pipelines...	19	Experimental	—	Jupyter Notebook
51	mickymultani/RAG-with-Cross-Encoder-Reranker Testing speed and accuracy of RAG with, and without Cross Encoder Reranker.	18	Experimental	49	Jupyter Notebook
52	DaoD/SPRING [AAAI'25] SPRING: Learning Scalable and Pluggable Virtual Tokens for...	18	Experimental	26	Python
53	vepr-ua/slm-rag-experimentation GraphRAG-powered Small Language Model for experimentation and statistical...	17	Experimental	2	Python
54	XieZilongAI/E2E-AFG An End-to-End Model with Adaptive Filtering for Retrieval-Augmented Generation	16	Experimental	16	Python
55	liunian-Jay/OptiSet [Under Review] OptiSet: Unified Optimizing Set Selection and Ranking for...	16	Experimental	10	—
56	liunian-Jay/ArcAligner [Under Review] ArcAligner: Adaptive Recursive Aligner for Compressed Context...	16	Experimental	13	—
57	AryaAftab/RATE RATE: An LLM-Powered Retrieval Augmented Generation Technology-Extraction Pipeline	15	Experimental	5	Python
58	suryanshgupta9933/CAMEL-RAG RAG pipeline with Google Search module in collaboration with CAMEL agents to...	15	Experimental	1	Jupyter Notebook
59	SCCSMARTCODE/rag-mastery 🧠 A hands-on lab for mastering Retrieval-Augmented Generation (RAG), from...	15	Experimental	—	Jupyter Notebook
60	SuperDim666/PAEC-kNN-MT Official PyTorch implementation of PAEC: Stabilizing Retrieval-Augmented...	15	Experimental	—	Python
61	van-truong/ToolsyBio A retrieval-augmented generation (RAG) system for exploring bioinformatics...	15	Experimental	6	Python
62	chatterjeesaurabh/Contextual-RAG-System-with-Hybrid-Search-and-Reranking Improved RAG retrieval by adding context to the chunks and performing Hybrid...	14	Experimental	7	Jupyter Notebook
63	YuITC/Meta-RAG 📚 Metacognitive Retrieval-Augmented Generation with Adaptive Strategy...	14	Experimental	—	Python
64	nv78/Improving-Retrieval Research Code for Improving RAG on Financial Documents Paper	14	Experimental	—	Jupyter Notebook
65	kushal0616/eggroll-embedding-trainer 🚀 Optimize NDCG in neural information retrieval systems using gradient-free...	14	Experimental	—	Python
66	YuITC/Metacognitive-RAG-System 📚 Metacognitive Retrieval-Augmented Generation with Adaptive Strategy...	14	Experimental	—	Python
67	alpinedev51/MambaRALM Analyzing the performance of Mamba-based vs. Transformer-based Retrieval...	13	Experimental	5	TeX
68	priyankamandikal/vedantany-10m Repository for Ancient Wisdom, Modern Tools: Exploring Retrieval-Augmented...	13	Experimental	7	Python
69	MakerCorn/nbedr Embedding Toolkit for RAG Applications	12	Experimental	1	Python
70	bab-git/two-stage-conrag A RAG pipeline that optimizes both precision and scalability by employing a...	12	Experimental	1	Jupyter Notebook
71	NamaWho/novelty-reranking-rag Beyond Redundancy: Embedding-Aware Novelty Reranking in Retrieval-Augmented...	12	Experimental	1	Jupyter Notebook
72	karthiksoman/biomixQA Repository for BiomixQA benchmark dataset	12	Experimental	3	Jupyter Notebook
73	JackLi0711/2025Fall-ADL-HW3-RAG RAG Framework Implementation (Retriever/Reranker Fine-Tuning & Inference)	12	Experimental	1	Python
74	NMHelmy/rag-retrieval-augmented-generation Implementation of a Retrieval-Augmented Generation (RAG) system using...	11	Experimental	—	Python
75	VamshiKrsna/liteRAG-Edge A lightweight Retrieval Augmented Generation pipeline using quantized small...	11	Experimental	—	Python
76	sailaxmitumu2000/RAG End-to-end Retrieval-Augmented Generation (RAG) pipeline with semantic +...	11	Experimental	—	Jupyter Notebook
77	Gyokuken/Retrieval-Augmented-Generation-Project A minimal but complete Retrieval-Augmented Generation (RAG) application that...	11	Experimental	—	Python
78	omkarnica/rag-from-scratch Minimal Retrieval-Augmented Generation pipeline built from scratch using...	11	Experimental	—	Python
79	randyungaro/ragu-machine_learning Retrieval-Augmented Generation Unified (RAGU) is an advanced AI architecture...	11	Experimental	—	Python
80	Tonyhrule/Factual-Validation-Simplification Enhancing factual accuracy and storage efficiency via summarization,...	11	Experimental	2	Python
81	daved01/rag-experiments Some retrieval-augmented generation experiments.	11	Experimental	2	Python
82	18alantom/rag-md-search-thing Trying to implement a RAG search after seeing this diagram:...	10	Experimental	1	Python
83	tmcarmichael/retrieval-augmented-generation-pipeline Containerized Retrieval Augmented Generation pipeline with pgvector...	10	Experimental	1	Python