Get a production-ready AI chatbot built with OpenAI GPT and LangChain — handling customer support, Q&A, email generation, document search, and more, tailored to your real business workflow.
I Will Build a Custom AI Chatbot with GPT and LangChain
A focused, production-ready AI chatbot for a single core use case — Q&A, email generation, summary, or strategy suggestion.
- AI LLM model integration (OpenAI GPT-4 / GPT-3.5)
- Retrieval-Augmented Generation (RAG) for document-grounded answers
- Pre-set conversational journey tailored to your use case
- User authentication built in
- Full source code delivered
- Single use case: Q&A bot, email generator, summariser, or strategy suggester
Everything in Starter plus CRM / database integration and multi-language support for broader business deployment.
- Everything included in the Starter tier
- Integration with your CRM or existing database
- Multi-language support for diverse user bases
- Scalable backend logic suitable for production environments
- REST API integration for connecting to external systems
- Clean, maintainable code with clear documentation
A comprehensive, fully integrated AI chatbot solution — maximum scope, multi-language, CRM-connected, and cloud-deployable.
- Everything included in the Standard tier
- Extended scope for complex, multi-flow conversational systems
- Vector database setup (e.g. Pinecone) for large document libraries
- Cloud deployment architecture and configuration
- Support for customer support, sales, internal assistant, and Q&A use cases in one build
- Priority requirement analysis and dedicated build consultation
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Key details about this service to help you decide. Generated by Zinn Hub, not the seller.
Value Position
Core Tech Stack
RAG Included
Source Code Ownership
CRM & Multi-Language
What You'll Receive
Full Description
Stop losing time to repetitive queries, manual responses, and disconnected workflows. A custom AI chatbot built on OpenAI GPT and LangChain puts intelligent, context-aware automation at the heart of your business — answering questions, drafting emails, summarising content, and guiding users through conversations without you lifting a finger.
Zinn Digital® are Software Engineers and AI Developers based in London, England. We design, build, and deploy intelligent, production-ready AI chatbots tailored to your specific use case — not cookie-cutter demos. Every project begins with clear requirement analysis so the solution we deliver actually fits your business.
WHAT WE CAN BUILD FOR YOU
We handle a wide range of AI chatbot use cases, including:
— Q&A bots trained on your documents (PDFs, FAQs, internal knowledge bases)
— Email generation and drafting assistants
— Content summary and strategy suggestion tools
— Customer support and sales bots
— Internal staff assistants
— API-based chatbot integrations
— AI automation for repetitive tasks
All bots are built with Retrieval-Augmented Generation (RAG), meaning your chatbot draws answers from your actual content rather than guessing — giving users accurate, grounded responses every time.
TECH STACK
Every chatbot is built using Python, the OpenAI API (GPT-4 / GPT-3.5), LangChain for conversational logic, vector databases (such as Pinecone) for document retrieval, REST APIs for integration, and cloud-ready backend architecture for scalability.
WHAT EVERY BUILD INCLUDES
Regardless of the tier you choose, your chatbot will include:
— AI LLM model integration (OpenAI GPT)
— Retrieval-Augmented Generation (RAG)
— Pre-set conversational journey
— User authentication
— Full source code delivered to you
For larger scopes, we also offer CRM and database integration as well as multi-language support — available in the Standard and Full tiers.
HOW IT WORKS
We strongly recommend messaging us before ordering to confirm scope and feasibility. Once your order is placed, we gather your requirements via the order chat, agree on the conversational flows and data sources, build and test the chatbot, and deliver clean, maintainable code with documentation.
WHO THIS IS FOR
This service is ideal for startups, SMEs, and growing businesses that want to automate customer-facing or internal workflows with reliable, scalable AI — without the overhead of a full in-house engineering team.
Why Zinn Digital®? We are business-oriented engineers who write clean, maintainable code, communicate clearly at every stage, and build solutions designed to work in production — not just in a demo environment. Ongoing support options are also available should you need them after delivery.
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Compare Packages
| Feature | Starter | Standard | Full Build |
|---|---|---|---|
| Delivery Time | 7 days | 10 days | 14 days |
| Revisions | unlimited | unlimited | unlimited |
| AI LLM model integration (OpenAI GPT-4 / GPT-3.5) | ✓ | ✕ | ✕ |
| Retrieval-Augmented Generation (RAG) for document-grounded answers | ✓ | ✕ | ✕ |
| Pre-set conversational journey tailored to your use case | ✓ | ✕ | ✕ |
| User authentication built in | ✓ | ✕ | ✕ |
| Full source code delivered | ✓ | ✕ | ✕ |
| Single use case: Q&A bot, email generator, summariser, or strategy suggester | ✓ | ✕ | ✕ |
| Everything included in the Starter tier | ✕ | ✓ | ✕ |
| Integration with your CRM or existing database | ✕ | ✓ | ✕ |
| Multi-language support for diverse user bases | ✕ | ✓ | ✕ |
| Scalable backend logic suitable for production environments | ✕ | ✓ | ✕ |
| REST API integration for connecting to external systems | ✕ | ✓ | ✕ |
| Clean, maintainable code with clear documentation | ✕ | ✓ | ✕ |
| Everything included in the Standard tier | ✕ | ✕ | ✓ |
| Extended scope for complex, multi-flow conversational systems | ✕ | ✕ | ✓ |
| Vector database setup (e.g. Pinecone) for large document libraries | ✕ | ✕ | ✓ |
| Cloud deployment architecture and configuration | ✕ | ✕ | ✓ |
| Support for customer support, sales, internal assistant, and Q&A use cases in one build | ✕ | ✕ | ✓ |
| Priority requirement analysis and dedicated build consultation | ✕ | ✕ | ✓ |
Portfolio
Examples of the seller's work related to this Zinn.
Build a Custom AI Chatbot with GPT and LangChain
Build a Custom AI Chatbot with GPT and LangChain
Extra Information
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Frequently Asked Questions
Yes, we strongly recommend it. Every AI chatbot project is different, and a quick conversation before you order lets us confirm the scope, technical feasibility, and the right tier for your needs. This avoids any misalignment once the order starts.
We will need a clear description of your use case (e.g. customer support bot, document Q&A, email generator), any documents or data sources the bot should reference, your preferred language(s), and details of any systems it needs to connect to (CRM, database, API). The more detail you share, the better we can tailor the build.
Yes. Full source code is included in every tier. The code is written in Python and structured to be clean, readable, and maintainable so your own team can work with it after delivery.
RAG means the chatbot retrieves relevant information from your actual documents or knowledge base before generating a response. Instead of relying purely on the language model's general training, it grounds its answers in your specific content — making responses far more accurate and relevant.
The Starter tier suits straightforward, single-purpose bots such as a Q&A assistant or email generator. Choose Standard if you need CRM or database integration or multi-language support. The Full Build is for complex, multi-flow systems requiring large-scale document retrieval, cloud deployment, and broader integration scope. If you are unsure, message us and we will advise honestly.
Yes. We build chatbots with REST API-based architecture, making them straightforward to integrate into websites, mobile apps, or internal tools. Cloud deployment configuration is included in the Full Build tier and available as a scope discussion on other tiers.
All tiers include unlimited revisions within the agreed scope. If you require ongoing support or bug fixes after the order is marked complete, our post-delivery support add-on provides seven days of dedicated assistance.
Yes. Ongoing support options are available. Please discuss your longer-term requirements with us before or during the order and we can outline what is possible.
Customer Reviews
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Thank you very much for this work, I recommend it.
Thank you very much
Zinn Hub Review We’re very pleased with Zirsha’s work. He delivered all mandatory requirements and integrated our requested changes quickly and flexibly. What stood out: Clean, well-structured code with a detailed README Fast response times and polite communication Proactive bug-fixing and a constructive attitude throughout the project Room for even smoother hand-offs: Include a version tag or Git commit link with each delivery Neile only a key-free .env.example file for security Overall, an excellent collaboration—looking forward to working together again.
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