Get an intelligent, data-driven AI chatbot trained on your own PDFs, CSVs or database — built with LangChain and large language models for accurate, context-aware query and response functionality.
I Will Build a Custom AI Chatbot With LangChain, RAG and LLMs
A focused AI chatbot trained on a single PDF or CSV data source with core query and response functionality.
- Chatbot trained on your PDF or CSV data
- LLM-powered query and response functionality
- Customisable chatbot behaviour and interaction
- Unlimited revisions
- Delivered as working code via order manager
An enhanced chatbot with conversation history, multi-source data integration and broader platform support.
- Everything in Starter
- Conversation history storage and retrieval
- Integration with multiple data sources (PDFs, CSVs and databases)
- Data scraping or sourcing if data is not yet available
- Feedback loop support for ongoing chatbot learning
- Unlimited revisions
A fully featured, production-ready AI chatbot with external platform integration and advanced LLM configuration.
- Everything in Boost
- Integration with websites, apps or messaging platforms
- Advanced LLM configuration and RAG pipeline setup
- Full conversation history with feedback loops and iterative learning
- Data scraping and sourcing included
- Unlimited revisions
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Value Position
Data Input Support
AI Framework
Starter Delivery
Conversation Memory
What You'll Receive
Full Description
Imagine your data answering questions instantly, accurately, and around the clock — without a single human agent involved. That is exactly what a custom LangChain-powered AI chatbot delivers, and it is precisely what Zinn Digital builds.
We are a London-based team of chatbot developers specialising in large language model (LLM) integrations. We build intelligent, data-driven conversational systems using LangChain, retrieval-augmented generation (RAG), and leading LLM models — so your chatbot does not just chat, it reasons over your actual data.
**What you get:**
Every chatbot we build is trained on your own datasets. Whether your information lives in PDFs, CSV files, or a database, we extract, structure, and connect it to a conversational layer that responds with precision. Core capabilities include:
— Accurate query and response functionality drawing directly from your supplied data
— LLM integration for intelligent, natural-language answers
— Conversation history storage and retrieval, enabling contextual, ongoing dialogue
— Customisable chatbot behaviour and user interaction flows
— Data scraping and sourcing: if you do not yet have the data ready, we can find or scrape it for you
**How it works:**
Once your order is placed, share your data files and a brief description of your use case via the order chat. We will confirm the scope, build your chatbot, and deliver working code or a deployable solution within the agreed timeframe. Unlimited revisions mean we refine until the output meets your expectations.
**Who this is for:**
This service suits businesses and developers who need a chatbot for customer support, internal knowledge querying, automated data retrieval, or any scenario where users need to ask questions of a specific dataset. If you have PDFs full of product information, CSVs of customer records, or a proprietary database — this chatbot makes that knowledge instantly accessible.
**Why Zinn Digital:**
We bring specialist expertise in LLM-based chatbot architecture, seamless data integration, and production-ready delivery. Our solutions support feedback loops and ongoing learning, meaning your chatbot can grow smarter over time. We are fast, professional, and communicate throughout the process — so you are never left wondering what is happening with your project.
Ready to put your data to work? Place your order and let us build the AI chatbot your business deserves.
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Compare Packages
| Feature | Starter | Boost | Premium |
|---|---|---|---|
| Delivery Time | 2 days | 4 days | 6 days |
| Revisions | unlimited | unlimited | unlimited |
| Chatbot trained on your PDF or CSV data | ✓ | ✕ | ✕ |
| LLM-powered query and response functionality | ✓ | ✕ | ✕ |
| Customisable chatbot behaviour and interaction | ✓ | ✕ | ✕ |
| Unlimited revisions | ✓ | ✓ | ✓ |
| Delivered as working code via order manager | ✓ | ✕ | ✕ |
| Everything in Starter | ✕ | ✓ | ✕ |
| Conversation history storage and retrieval | ✕ | ✓ | ✕ |
| Integration with multiple data sources (PDFs, CSVs and databases) | ✕ | ✓ | ✕ |
| Data scraping or sourcing if data is not yet available | ✕ | ✓ | ✕ |
| Feedback loop support for ongoing chatbot learning | ✕ | ✓ | ✕ |
| Everything in Boost | ✕ | ✕ | ✓ |
| Integration with websites, apps or messaging platforms | ✕ | ✕ | ✓ |
| Advanced LLM configuration and RAG pipeline setup | ✕ | ✕ | ✓ |
| Full conversation history with feedback loops and iterative learning | ✕ | ✕ | ✓ |
| Data scraping and sourcing included | ✕ | ✕ | ✓ |
Portfolio
Examples of the seller's work related to this Zinn.
Build a Custom AI Chatbot With LangChain, RAG and LLMs
Build a Custom AI Chatbot With LangChain, RAG and LLMs
Extra Information
Why Choose Me
Tools I Use
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Frequently Asked Questions
We support PDFs, CSVs, and databases as primary data sources. If you have data in another format, get in touch via the order chat and we will advise on compatibility.
No problem. We offer data scraping and sourcing as part of the Boost and Premium packages, so we can find or collect the relevant data to train your chatbot.
Yes. From the Boost tier onwards, the chatbot can be integrated with multiple data sources — including PDFs, CSVs, and databases — simultaneously.
We implement secure storage for conversation history so the chatbot retains context across sessions, making interactions more natural and data-driven over time.
Yes. The Premium package includes integration with websites, applications, and messaging platforms. If you need platform integration on a lower tier, please discuss this before ordering.
Once your order is placed, simply share your data files (PDFs, CSVs, or database access details) and a brief description of your use case via the order chat. We will confirm the scope and get to work.
All packages include unlimited revisions. We will keep refining the chatbot until it meets your requirements.
We deliver working, deployable code. Hosting and deployment are the client's responsibility unless discussed and agreed separately within the order chat.
Customer Reviews
See what our customers say about this Zinn
I had the opportunity to work with Neil, who was cooperative and understanding throughout the process. They maintained good communication and delivered the required work in a satisfactory manner.
Thank you!
He did great in terms of coding and understanding the issues. It was a product finder bot. The product that was delivered was as promised. It was written in Python and Next.js. The only issue was the delivery time, but that was partially due to the embedding taking a while because of a large database. He clearly knows what he is doing, and you can easily communicate with him. He follows up and ensures everything works, which is nice.
I'm very happy to have found this specialist. He built a RAG system for my project with great attention to detail and a clear understanding of the task. I plan to continue working with him to further develop and scale the system, and I hope for a reliable long-term collaboration.
Highly recommend. Was very polite and was able to help me very quickly!
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