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 96 hybrid retrieval optimization tools tracked. 2 score above 50 (established tier). The highest-rated is denser-org/denser-retriever at 55/100 with 294 stars.

Get all 96 projects as JSON

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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...	55	Established	294	Python
2	rayliuca/T-Ragx Enhancing Translation with RAG-Powered Large Language Models	51	Established	95	Python
3	neuml/rag 🚀 Retrieval Augmented Generation (RAG) with txtai. Combine search and LLMs...	47	Emerging	445	Python
4	NovaSearch-Team/RAG-Retrieval Unify Efficient Fine-tuning of RAG Retrieval, including Embedding, ColBERT,...	46	Emerging	1,103	Python
5	RulinShao/retrieval-scaling Official repository for "Scaling Retrieval-Based Langauge Models with a...	45	Emerging	224	Python
6	MozerWang/Loong [EMNLP 2024 (Oral)] Leave No Document Behind: Benchmarking Long-Context LLMs...	43	Emerging	149	Python
7	Trae1ounG/DyPRAG [arxiv: 2503.23895] Dynamic Parametric Retrieval Augmented Generation for...	43	Emerging	172	Python
8	target-benchmark/target TARGET is a benchmark for evaluating Table Retrieval for Generative Tasks...	42	Emerging	28	Jupyter Notebook
9	mangopy/SearchLM Official code for NeurIPS2025 "Iterative Self-Incentivization Empowers Large...	42	Emerging	225	Python
10	PranavMishra17/Metadata-Enrichment-with-LLMs-for-RAGs-Internal-Knowledge-Retrieval A comprehensive framework for enhancing Retrieval-Augmented Generation (RAG)...	41	Emerging	2	Python
11	zorazrw/filco [Preprint] Learning to Filter Context for Retrieval-Augmented Generaton	40	Emerging	196	Python
12	mangopy/direct-rag-learning Official code for TOIS2026 "Direct Retrieval-augmented Optimization:...	39	Emerging	276	Python
13	OpenProteinAI/PoET-2 Code and model weights for PoET-2, a retrieval-augmented multimodel protein...	39	Emerging	22	Python
14	daved01/ragcore A library to build retrieval-augmented generation apps with just a few lines of code.	38	Emerging	4	Python
15	nju-websoft/DraCo Dataflow-guided retrieval augmentation for repository-level code completion,...	38	Emerging	34	Python
16	reichenbch/RAG-examples Retrieval Augmented Generation Examples - Original, GPT based, Semantic Search based.	38	Emerging	60	Jupyter Notebook
17	HSLiu-Initial/CtrlA This includes the original implementation of CtrlA: Adaptive...	37	Emerging	65	Jupyter Notebook
18	ictnlp/LevelRAG The official implementation of "LevelRAG: Enhancing Retrieval-Augmented...	36	Emerging	51	Python
19	brishtiteveja/ReferenceRAG REFRAG - An implementation of the REFRAG paper from Meta Superintelligence Labs	36	Emerging	3	Jupyter Notebook
20	CyberAgentAILab/RALF [CVPR 2024 Oral] Official repository for RALF: Retrieval-Augmented Layout...	36	Emerging	143	Python
21	mytechnotalent/rea A Reverse Engineering Assistant leveraging Retrieval-Augmented Generation...	35	Emerging	36	Jupyter Notebook
22	Mehdiazarafza/UAV-RAG This repository explores the integration of Large Language Models (LLMs)...	35	Emerging	8	—
23	VodLM/vod End-to-end training of Retrieval-Augmented LMs (REALM, RAG)	33	Emerging	23	Python
24	JustinHsu1019/general-rag-template Template for building a High-Accuracy Retrieval-Augmented Generation (RAG)...	33	Emerging	5	Python
25	fusion-jena/information-retrieval-using-multiple-LLM-and-RAG Information Retrieval using Multiple LLMs and RAG	33	Emerging	4	TeX
26	yhoshi3/RaLLe RaLLe: A Framework for Developing and Evaluating Retrieval-Augmented Large...	33	Emerging	55	Python
27	harinaralasetty/CORAG A highly contextualized retrieval system integrating Large Language Models...	32	Emerging	27	Python
28	ovitrac/RAGGAE 📚 RAGGAE: Retrieval-Augmented Generation architecture for enterprise –...	32	Emerging	1	Python
29	hypermind-co/contextual-retrieval Enhance your RAG with Contextual Retrieval	32	Emerging	5	Python
30	legobridge/retrieval-augmented-generation A proof-of-concept of retrieval-augmented generation, using Google's PaLM API.	31	Emerging	2	Python
31	gtfintechlab/ACLReady ACLReady, a retrieval-augmented language model application that can be used...	30	Emerging	6	TeX
32	panruotong/CAG Implementation of Not All Contexts Are Equal: Teaching LLMs...	30	Emerging	22	Python
33	somewheresystems/dataclysm Pull high-quality, efficient embeddings for PubMed, arXiv and Wikipedia from...	29	Experimental	47	Jupyter Notebook
34	18907305772/MAKER ACL'2023: Multi-Grained Knowledge Retrieval for End-to-End Task-Oriented Dialog	29	Experimental	9	Python
35	taherfattahi/embedding-optimizer Two approaches to generating optimized embeddings in the Retrieval-Augmented...	29	Experimental	5	Python
36	Pro-GenAI/iRAT 🔄 Replanning and Controlled Retrieval for Robust LLM Reasoning	29	Experimental	8	Jupyter Notebook
37	antononcube/Raku-LLM-RetrievalAugmentedGeneration Raku package for doing LLM Retrieval Augmented Generation (RAG).	29	Experimental	4	Raku
38	Debrup-61/RaDeR Official Code Repositiry for "RaDeR: Reasoning-aware Dense Retrieval Models"...	28	Experimental	16	Python
39	sharif-ml-lab/IMDb-IR-System IMDb IR System Project - MIR Course - Spring 2024	27	Experimental	4	Jupyter Notebook
40	ml-jku/RA-DT Retrieval-Augmented Decision Transformer: External Memory for In-context RL	26	Experimental	24	Python
41	MakerCorn/nbedr Embedding Toolkit for RAG Applications	25	Experimental	1	Python
42	DaoD/SPRING [AAAI'25] SPRING: Learning Scalable and Pluggable Virtual Tokens for...	25	Experimental	26	Python
43	mickymultani/RAG-with-Cross-Encoder-Reranker Testing speed and accuracy of RAG with, and without Cross Encoder Reranker.	25	Experimental	49	Jupyter Notebook
44	XieZilongAI/E2E-AFG An End-to-End Model with Adaptive Filtering for Retrieval-Augmented Generation	23	Experimental	16	Python
45	bnarasimha21/rag-demo Demo app showcasing Retrieval-Augmented Generation with vector search	22	Experimental	—	Python
46	VashuTheGreat/Multi-Rag Multi source Retrieval Augmented Generation system using vector databases and LLMs.	22	Experimental	—	Jupyter Notebook
47	vepr-ua/slm-rag-experimentation GraphRAG-powered Small Language Model for experimentation and statistical...	21	Experimental	2	Python
48	chatterjeesaurabh/Contextual-RAG-System-with-Hybrid-Search-and-Reranking Improved RAG retrieval by adding context to the chunks and performing Hybrid...	21	Experimental	7	Jupyter Notebook
49	rpo19/ReFactX ReFactX: Scalable Reasoning with Reliable Facts via Constrained Generation	21	Experimental	—	Jupyter Notebook
50	AINexumLab/slm-rag Retrieval-Augmented Generation (RAG) for Small Language Models (SLMs)	21	Experimental	—	Jupyter Notebook
51	abe238/volatility-driven-decay Adaptive memory retention for RAG systems. VDD dynamically adjusts decay...	21	Experimental	—	Python
52	Farjad258/rag-pipeline-evaluation-faiss-hybrid-chunking Reproducible evaluation of Retrieval-Augmented Generation (RAG) pipelines...	21	Experimental	—	Jupyter Notebook
53	NoliNobdon/TriStage-RAG 🎯 Optimize retrieval with TriStage-RAG, a 3-stage pipeline that enhances...	21	Experimental	—	Python
54	GokayGulsoy/Information-Retrieval-and-Modern-NLP Repository for the CENG543 (Information Retrieval and Modern NLP)	21	Experimental	—	—
55	van-truong/ToolsyBio A retrieval-augmented generation (RAG) system for exploring bioinformatics...	21	Experimental	6	Python
56	AryaAftab/RATE RATE: An LLM-Powered Retrieval Augmented Generation Technology-Extraction Pipeline	21	Experimental	5	Python
57	priyankamandikal/vedantany-10m Repository for Ancient Wisdom, Modern Tools: Exploring Retrieval-Augmented...	20	Experimental	7	Python
58	alpinedev51/MambaRALM Analyzing the performance of Mamba-based vs. Transformer-based Retrieval...	20	Experimental	5	TeX
59	kusp-dev/retrieval-weight-experiment Gradient-Free Retrieval Weight Learning via Thompson Sampling with LLM...	19	Experimental	—	Python
60	karthiksoman/biomixQA Repository for BiomixQA benchmark dataset	19	Experimental	3	Jupyter Notebook
61	Tonyhrule/Factual-Validation-Simplification Enhancing factual accuracy and storage efficiency via summarization,...	18	Experimental	2	Python
62	daved01/rag-experiments Some retrieval-augmented generation experiments.	18	Experimental	2	Python
63	SuperDim666/PAEC-kNN-MT Official PyTorch implementation of PAEC: Stabilizing Retrieval-Augmented...	17	Experimental	—	Python
64	suryanshgupta9933/CAMEL-RAG RAG pipeline with Google Search module in collaboration with CAMEL agents to...	17	Experimental	1	Jupyter Notebook
65	tmcarmichael/retrieval-augmented-generation-pipeline Containerized Retrieval Augmented Generation pipeline with pgvector...	17	Experimental	1	Python
66	SCCSMARTCODE/rag-mastery 🧠 A hands-on lab for mastering Retrieval-Augmented Generation (RAG), from...	17	Experimental	—	Jupyter Notebook
67	liunian-Jay/ArcAligner [Under Review] ArcAligner: Adaptive Recursive Aligner for Compressed Context...	16	Experimental	13	—
68	liunian-Jay/OptiSet [Under Review] OptiSet: Unified Optimizing Set Selection and Ranking for...	16	Experimental	10	—
69	davidsbatista/haystack-retrieval Different retrieval techniques implemented in Haystack - presented at PyCon...	14	Experimental	7	Python
70	nv78/Improving-Retrieval Research Code for Improving RAG on Financial Documents Paper	14	Experimental	—	Jupyter Notebook
71	YuITC/Meta-RAG 📚 Metacognitive Retrieval-Augmented Generation with Adaptive Strategy...	14	Experimental	—	Python
72	YuITC/Metacognitive-RAG-System 📚 Metacognitive Retrieval-Augmented Generation with Adaptive Strategy...	14	Experimental	—	Python
73	xiami2019/UAR [Findings of EMNLP'2024] Unified Active Retrieval for Retrieval Augmented Generation	14	Experimental	23	Python
74	JackLi0711/2025Fall-ADL-HW3-RAG RAG Framework Implementation (Retriever/Reranker Fine-Tuning & Inference)	14	Experimental	1	Python
75	NamaWho/novelty-reranking-rag Beyond Redundancy: Embedding-Aware Novelty Reranking in Retrieval-Augmented...	14	Experimental	1	Jupyter Notebook
76	bab-git/two-stage-conrag A RAG pipeline that optimizes both precision and scalability by employing a...	14	Experimental	1	Jupyter Notebook
77	randyungaro/ragu-machine_learning Retrieval-Augmented Generation Unified (RAGU) is an advanced AI architecture...	13	Experimental	—	Python
78	omkarnica/rag-from-scratch Minimal Retrieval-Augmented Generation pipeline built from scratch using...	13	Experimental	—	Python
79	Gyokuken/Retrieval-Augmented-Generation-Project A minimal but complete Retrieval-Augmented Generation (RAG) application that...	13	Experimental	—	Python
80	sailaxmitumu2000/RAG End-to-end Retrieval-Augmented Generation (RAG) pipeline with semantic +...	13	Experimental	—	Jupyter Notebook
81	VamshiKrsna/liteRAG-Edge A lightweight Retrieval Augmented Generation pipeline using quantized small...	13	Experimental	—	Python
82	NMHelmy/rag-retrieval-augmented-generation Implementation of a Retrieval-Augmented Generation (RAG) system using...	13	Experimental	—	Python
83	MarkoKolarski/RepoSearchRAG LLM-based Listwise Reranker for Retrieval-Augmented Generation (RAG) over...	13	Experimental	3	Python
84	youngerous/qtree [NAACL'25 Findings] Learning to Explore and Select for Coverage-Conditioned...	13	Experimental	3	Python
85	kim1ng/MDR Code for NAACL 2024 "MDR: Model-Specific Demonstration Retrieval at...	12	Experimental	6	Python
86	Kdotseth7/advanced-rag Advanced RAG pipeline using Re-Ranking after initial retrieval	12	Experimental	5	Python
87	USTC-StarTeam/RaPID ACL2025 \| RaPID: Efficient Retrieval-Augmented Long Text Generation with...	12	Experimental	4	Python
88	Gaurav-822/RagImplementation Implementing Retrieval Augmented Generation (RAG) via using GPT-3.5-Turbo as...	12	Experimental	5	Jupyter Notebook
89	18alantom/rag-md-search-thing Trying to implement a RAG search after seeing this diagram:...	12	Experimental	1	Python
90	linhaowei1/MolRetrieval This repo implements many methods to retrieve molecules that are similar to...	11	Experimental	4	Python
91	Wizo17/contextual_rag_application RAG Application with Contextual Retrieval and Lexical Retrieval.	11	Experimental	—	Python
92	bharathraj-v/rag-chat Retreival-Augmented Generation with Mixtral 8x7b powered by MILVUS vector...	11	Experimental	4	Jupyter Notebook
93	nabeelshan78/GroundTruth-RAG-Scratch An end-to-end RAG system that grounds LLMs in factual reality, using...	10	Experimental	1	Jupyter Notebook
94	rasyosef/prod-rag-with-gpt-3_5-turbo-and-mongodb-atlas GPT 3.5 Turbo LLM and MongoDB Atlas Vector Search for fast and performant...	10	Experimental	2	Jupyter Notebook
95	nabeelshan78/RAG-Fundamentals A hands-on exploration of Retrieval-Augmented Generation's core components:...	10	Experimental	1	Jupyter Notebook
96	nabeelshan78/advanced-rag-techniques Building production-grade Retrieval-Augmented Generation (RAG) systems....	10	Experimental	1	Jupyter Notebook

Comparisons in this category

T-Ragx and rag (51 vs 47)