How We Developed RAG Based Chatbot

Project Overview

RAG based chatbot is able to answer user queries related to documents uploaded by admin. The client wanted to automate document related queries of users. CoreFragment developed custom chatbot that can support upto 500 documents at a time with 40k tokens storage capacity in memory for context retrival.

Client Region

Europe

Industry

AI and ML

Use Cases:

  • Need of whole document reading is reduced
  • Frequent user doubts related to particular document can be resolved by bot
  • User experience improved when bot clear their doubts irrespective of admin availability
  • Information access becomes faster
RAG-chatbot

Development Insights:

  • Documents are splitted into chunks and their embeddings are stored in vector databases.
  • When user enters query into chatbot, it also splitted into chunks. LLMs generate response based on semantic search on query chunks with context retrieving.
  • The response and query both can be stored in memory upto 40k - 50k tokens.
  • It is used by LLM as context retrieving for further query response.

Technology Platforms

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How CoreFragment Technologies can help in RAG based development?

CoreFragment Technologies has expertise and experience in RAG architecture, LLM development and custom AI product development.

  • To find out if RAG is the exact requirement for your product

    RAG is powerful but not the right solution for every chatbot requirement. CoreFragment helps you assess your use case — document volume, query types, privacy requirements, response accuracy expectations and recommends the right architecture. Sometimes RAG is the answer. Sometimes a fine-tuned model or a hybrid approach works better. We give you an honest evaluation, not a sales pitch.

  • Help to deploy on-premise RAG solutions

    If your documents contain confidential business data, patient information, legal content, or anything that cannot go to a third-party AI API, CoreFragment helps you deploy a fully on-premise RAG system using locally hosted LLMs. Your documents stay on your servers. Your queries never leave your network. You still get the full power of AI-driven document search.

  • Manage chatbot hallucinations

    Hallucination is the biggest risk in AI chatbots for business use. CoreFragment builds RAG systems with retrieval confidence thresholds, fallback responses for low-confidence queries, and source citation features, so your chatbot only answers when it has reliable context, and tells users honestly when it does not.

  • Build architecture for pilot and scaling both levels

    Whether you are starting with 50 documents or planning for 5,000, CoreFragment builds your RAG system on a vector database architecture and cloud infrastructure that scales without requiring a redesign. You start lean, validate with real users, and expand confidently knowing the foundation supports where you are going.

  • Automate your large document library to ease access of people

    If your team or your customers spend time searching through manuals, reports, policies, or product documents for answers — we can help you build a RAG chatbot that does that searching for them. You upload the documents. Your users ask questions in plain language. The chatbot finds the right answer from the right document in seconds.

General questions we receive related RAG based development

How does the RAG chatbot actually find the right answer from hundreds of documents?

When a user asks a question, the system breaks it into chunks and runs a semantic search across all stored document embeddings in the vector database. It finds the most contextually relevant sections, not just keyword matches and passes them to the LLM as context. The LLM then generates a natural, accurate response based on that retrieved content, rather than making up an answer from general training.

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