I will build a custom rag chatbot with langchain,fastapi and openai

Do you need an AI chatbot that answers from YOUR data not made-up answers?

I build production-grade RAG (Retrieval-Augmented Generation) chatbots that:

Answer from your documents (PDFs, JSON, text files)

Cite sources for every answer

Say "I don't know" instead of hallucinating

Deploy to production (Render + Vercel

WHAT I'VE BUILT

A live RAG system for Indian college admissions:

shiksha-chat.vercel.app

It answers questions about 30+ IIT colleges and Bihar state institutions with cited sources, and achieved 100% accuracy on a 40-question evaluation (30 factual + 10 anti-hallucination tests).

MY TECH STACK

LangChain (RAG pipeline)

OpenAI (GPT-4o-mini + embeddings)

ChromaDB (vector store)

FastAPI (backend)

Next.js + Tailwind (frontend)

Render + Vercel (deployment)

WHAT YOU GET

Basic: Working RAG chatbot over your docs

Standard: RAG + custom Next.js chat UI

Premium: Full deployment + evaluation suite + 30-day support

WHY ME

I build production systems, not demos

Every answer is cited from your sources

I test for hallucinations before delivery

Full source code always included

Send me a message with your use case I'll reply within a few hours with a plan.