7 RAG Tools to Make the Most Out of Your LLMs 7 RAG Tools to Make the Most Out of Your LLMs
Open source Retrieval-Augmented Generation (RAG) models are getting pretty big as the need for enhanced features in large language models becomes... 7 RAG Tools to Make the Most Out of Your LLMs

Open source Retrieval-Augmented Generation (RAG) models are getting pretty big as the need for enhanced features in large language models becomes more important. So what are they? Well, the RAG models are a fusion of dense retrieval (DPR) and sequence-to-sequence models. They are designed to enhance the capabilities of LLMs by incorporating external knowledge. This is made possible by retrieving documents related to a query and using these documents as additional context for generating responses.

This process allows RAG models to produce more accurate and contextually relevant outputs, as both the retrieval and generation components are fine-tuned together. This approach has been particularly effective in knowledge-intensive NLP tasks, setting new benchmarks in areas such as open-domain question answering. 

So now that you have a pretty good idea of what RAG models are, let’s take a look at a few examples that you can find from the open-source community. 

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NeMo Guardrails

Created by NVIDIA, this model offers an open-source toolkit to add programmable guardrails to conversational systems based on large language models, ensuring safer and more controlled interactions. These guardrails allow developers to define how the model behaves on specific topics, prevent discussions on unwanted subjects, and ensure compliance with conversation design best practices. 

The toolkit supports a range of Python versions and provides various benefits, including the ability to build trustworthy applications, connect models securely, and control dialogues. It also includes mechanisms to protect against common LLM vulnerabilities, such as jailbreaks and prompt injections, and supports integration with multiple LLMs and other services like LangChain for enhanced functionality. For further details on installation, usage, and the types of guardrails available, visit the NeMo Guardrails GitHub page.


LangChain is another open-source tool. It provides a powerful approach to implementing retrieval-augmented generation with Large Language Models. It demonstrates how to enhance LLMs’ responses by integrating retrieval steps within conversational models. This integration allows for dynamic information retrieval from databases or document collections to inform the model’s responses, making them more accurate and contextually relevant. 

By utilizing LangChain’s capabilities, developers can create more intelligent conversational agents capable of accessing and leveraging a vast range of external information sources. For an in-depth guide on implementing retrieval with LangChain, you can explore the detailed documentation and examples provided on their website.


LlamaIndex is an advanced toolkit for building RAG applications, enabling developers to enhance LLMs with the ability to query and retrieve information from various data sources. This toolkit facilitates the creation of sophisticated models that can access, understand, and synthesize information from databases, document collections, and other structured data. It supports complex query operations and integrates seamlessly with other AI components, offering a flexible and powerful solution for developing knowledge-enriched applications. For more comprehensive insights on LlamaIndex, its high-level concepts, and how to get started, visit the official documentation.



Verba is an open-source RAG chatbot powered by Weaviate. It simplifies exploring datasets and extracting insights through an end-to-end, user-friendly interface. Supporting local deployments or integration with LLM providers like OpenAI, Cohere, and HuggingFace, Verba stands out for its easy setup and versatility in handling various data types. Its core features include seamless data import, advanced query resolution, and accelerated queries through semantic caching, making it an ideal choice for creating sophisticated RAG applications​.


This model is a comprehensive LLM orchestration framework for building customizable, production-ready applications. It facilitates the connection of various components, such as models, vector databases, and file converters, into pipelines that can interact with data. With its advanced retrieval methods, Haystack is ideal for developing applications focused on retrieval-augmented generation, question-answering, semantic search, or conversational agents. It supports a technology-agnostic approach, allowing users to choose and switch between different technologies and vendors​.


Created by Arize AI, it focuses on AI observability and evaluation, offering tools like LLM Traces for understanding and troubleshooting LLM applications, and LLM Evals for assessing applications’ relevance and toxicity. It provides embedding analysis, enabling users to explore data clusters and performance, and supports RAG analysis to improve retrieval-augmented generation pipelines. Furthermore, it facilitates structured data analysis for A/B testing and drift analysis. Phoenix promotes a notebook-first approach, suitable for both experimentation and production environments, emphasizing easy deployment for continuous observability​.

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MongoDB is a powerful, open-source, NoSQL database designed for scalability and performance. It uses a document-oriented approach, supporting data structures similar to JSON. This flexibility allows for more dynamic and fluid data representation, making MongoDB popular for web applications, real-time analytics, and managing large volumes of data. MongoDB supports rich queries, full index support, replication, and sharding, offering robust features for high availability and horizontal scaling. For those interested in leveraging MongoDB in their projects, you can find more details and resources on its GitHub page.


Some great stuff right? As large language models continue to scare across industries, what is needed by stakeholders will only become more complex as requests become more diversified. So if you want to keep up on the latest threads, frameworks, and techniques so you can get the most out of your LLM, then you’ll want to head to ODSC East this April 23-25. 

At ODSC East, there’s an entire track solely dedicated to large language models. Learn from the movers and shakers, researchers, and those at the cutting edge of AI. Confirmed sessions include:

  • Enabling Complex Reasoning and Action with ReAct, LLMs, and LangChain
  • Ben Needs a Friend – An intro to building Large Language Model applications
  • Data Synthesis, Augmentation, and NLP Insights with LLMs
  • Building Using Llama 2
  • Quick Start Guide to Large Language Models
  • Build Conversational AI and Integrate into Product Page Using Watsonx Assistant
  • LLM Best Practises: Training, Fine-Tuning and Cutting Edge Tricks from Research
  • Machine Learning using PySpark for Text Data Analysis
  • Large Language Models as Building Blocks
  • Model Evaluation in LLM-enhanced Products
  • LLMs Meet Google Cloud: A New Frontier in Big Data Analytics
  • Operationalizing Local LLMs Responsibly for MLOps
  • LangChain on Kubernetes: Cloud-Native LLM Deployment Made Easy & Efficient
  • Training an OpenAI Quality Text Embedding Model from Scratch
  • Tracing In LLM Applications
  • Moving Beyond Statistical Parrots – Large Language Models and their Tooling
  • Reasoning in Large Language Models
  • Data Automation with LLM
  • CodeLlama: Open Foundation Models for Code
  • RAG, the bad parts (and the good!): building a deeper understanding of this hot LLM paradigm’s weaknesses, strengths, and limitations
  • Prompt Engineering: From Few Shot to Chain of Thought
  • Setting Up Text Processing Models for Success: Formal Representations versus Large Language Models 
  • Accelerating the LLM Lifecycle on the Cloud
  • Practical Challenges in LLM Evaluation
  • Deep Reinforcement Learning in the Real World: From Chip Design to LLMs
  • Mastering Langchain for LLM Application Development
  • Applying Responsible Generative AI in Healthcare
  • Power of Fine-tuning Large Language Models (Execution, Best Practices and Tools and Case Study from Microsoft)


ODSC gathers the attendees, presenters, and companies that are shaping the present and future of data science and AI. ODSC hosts one of the largest gatherings of professional data scientists with major conferences in USA, Europe, and Asia.