Get a bespoke AI chatbot, RAG-powered assistant, or full GPT web application built with Python, LangChain and ML — crafted precisely for your business by a London-based AI engineer.
I Will Build Your Custom AI Chatbot, RAG System or GPT Web App
Core AI chatbot setup with essential features — ideal for small projects, prototypes, or initial testing.
- AI chatbot setup with essential features
- Suitable for small projects or initial proof-of-concept
- Python-based build using LangChain or GPT integration
- Basic conversational flow configured to your use case
- Delivered via order manager with setup notes
- 1 revision included
Enhanced AI chatbot or GPT assistant with expanded features, integrations, and broader scope — the Boost upgrade included.
- Everything in Starter, scaled up in scope and complexity
- RAG integration or API/database connectivity (e.g. Google Sheets, Notion, CRM)
- Custom GPT model configured on your own documents or data
- Expanded conversational flows and improved response accuracy
- Suitable for customer support bots, lead-generation assistants, or internal tools
- 2 revisions included
Complete AI web application or SaaS platform with full-stack development, ML pipeline, and advanced integrations — the Premium upgrade included.
- Everything in Standard, with full-stack web application development
- AI website, SaaS platform, or client-facing dashboard with integrated AI features
- WhatsApp or multi-channel chatbot deployment
- Data processing and machine learning pipeline for enhanced AI performance
- Multi-API integration connecting your app to external services and platforms
- 3 revisions included
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Value Position
AI Tech Stack
RAG Capability
Integration Depth
Entry Delivery
What You'll Receive
Full Description
If you want an AI system that actually understands your business — trained on your data, connected to your tools, and ready to serve your customers — you are in the right place.
Zinn Digital, based in London, England, specialises in building production-ready AI chatbots, Retrieval-Augmented Generation (RAG) pipelines, custom GPT assistants, and full-stack AI web applications using Python, LangChain, GPT, and machine learning. Every build is scoped and crafted to your specific goals, not copied from a template.
**What Can Be Built For You**
AI Chatbots and Custom GPT Assistants — smart conversational agents trained on your own documents, PDFs, FAQs, or product data, deployable on your website, WhatsApp, or internal business platforms.
RAG Integration — Retrieval-Augmented Generation connects your AI to a live knowledge base so it returns accurate, source-grounded answers rather than hallucinated guesses. Essential for support bots, research tools, and data-heavy applications.
AI Websites and SaaS Platforms — complete web applications with integrated AI features, dashboards, user authentication, and client-facing interfaces.
API and Database Integration — connect your chatbot or app to CRMs, Notion, Google Sheets, or any external service via API so your AI operates within your existing workflows.
Data Processing and Machine Learning — clean, analyse, and structure your data to improve AI accuracy and performance over time.
**Who This Is For**
This service suits eCommerce businesses needing automated customer support, SaaS founders wanting to embed AI into their product, real estate agencies seeking lead-qualification bots, professionals who want a GPT assistant trained on their own knowledge base, and any business ready to automate repetitive queries or surface insights from their data.
**Example Use Cases**
— Customer support chatbot handling FAQs and escalations automatically
— GPT assistant trained on your internal documents or company knowledge base
— AI sales assistant on WhatsApp or web for lead capture and qualification
— Client-facing dashboard with AI-powered data insights
— Content or research assistant powered by your own source material
**How It Works**
Once your order is placed, simply share your project brief via the order chat. The scope delivered at each tier is clearly defined — for larger or more complex builds, choose the Standard or Full Build package. A consultation is available before ordering if you would like to discuss your requirements first.
All work is delivered by Zinn Digital's Python and ML engineering team, with direct communication throughout the project.
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Compare Packages
| Feature | Starter | Standard | Full Build |
|---|---|---|---|
| Delivery Time | 1 days | 3 days | 4 days |
| Revisions | 1 | 2 | 3 |
| AI chatbot setup with essential features | ✓ | ✕ | ✕ |
| Suitable for small projects or initial proof-of-concept | ✓ | ✕ | ✕ |
| Python-based build using LangChain or GPT integration | ✓ | ✕ | ✕ |
| Basic conversational flow configured to your use case | ✓ | ✕ | ✕ |
| Delivered via order manager with setup notes | ✓ | ✕ | ✕ |
| 1 revision included | ✓ | ✕ | ✕ |
| Everything in Starter, scaled up in scope and complexity | ✕ | ✓ | ✕ |
| RAG integration or API/database connectivity (e.g. Google Sheets, Notion, CRM) | ✕ | ✓ | ✕ |
| Custom GPT model configured on your own documents or data | ✕ | ✓ | ✕ |
| Expanded conversational flows and improved response accuracy | ✕ | ✓ | ✕ |
| Suitable for customer support bots, lead-generation assistants, or internal tools | ✕ | ✓ | ✕ |
| 2 revisions included | ✕ | ✓ | ✕ |
| Everything in Standard, with full-stack web application development | ✕ | ✕ | ✓ |
| AI website, SaaS platform, or client-facing dashboard with integrated AI features | ✕ | ✕ | ✓ |
| WhatsApp or multi-channel chatbot deployment | ✕ | ✕ | ✓ |
| Data processing and machine learning pipeline for enhanced AI performance | ✕ | ✕ | ✓ |
| Multi-API integration connecting your app to external services and platforms | ✕ | ✕ | ✓ |
| 3 revisions included | ✕ | ✕ | ✓ |
Extra Information
Why Choose Me
Tools I Use
Perfect For
Frequently Asked Questions
A wide range — including customer support bots, lead-generation assistants, sales automation bots, GPT assistants trained on your documents or FAQs, and research or content assistants. The right type depends on your goal and data, which can be discussed before you order.
Retrieval-Augmented Generation (RAG) means your AI retrieves information from a real knowledge base before generating a response, rather than relying solely on a pre-trained model. If you need accurate, source-grounded answers — for example from your own documents, product catalogue, or internal data — RAG is strongly recommended. It is included from the Standard package upwards.
Yes. API and database integrations are available, including connections to CRMs, Google Sheets, Notion, and other platforms. This is covered in the Standard and Full Build packages. If you have a specific integration in mind, mention it in your project brief.
At minimum, a clear description of your project — what the AI should do, who it is for, and any data or documents you want it trained on. If you have API credentials, branding guidelines, or platform access to share, that will help move things along. The more context you provide, the better the outcome.
Starter is for testing an idea or a simple, single-purpose chatbot. Standard suits businesses that need a properly integrated AI assistant connected to real data or external tools. Full Build is for complete AI web applications, SaaS platforms, or multi-channel deployments. If you are unsure, describe your project in the order chat and guidance will be provided.
Revisions are rounds of feedback where you can request changes to the delivered build within the original scope. Each package includes a set number of revisions (1, 2, or 3 respectively). Additional revision rounds are available as an add-on. Revisions do not cover entirely new features or scope changes.
Builds use Python as the primary language, with LangChain for AI orchestration, GPT (and compatible models including Gemini) for language generation, and RAG pipelines for knowledge retrieval. Machine learning components use standard Python ML libraries. The stack is always chosen to suit the project requirements.
Yes. The delivered application and code belong to you. Technical documentation and handover notes are available as an add-on if you want a written guide to running or modifying the system yourself after delivery.
Customer Reviews
See what our customers say about this Zinn
I had the pleasure of working with Neili on an AI API project, and I couldn’t be more impressed with the results. Neili demonstrated a strong understanding of both the technical and creative aspects of the project, delivering the work with high quality and attention to detail. Communication was seamless throughout, with quick responses and clear explanations. Neili showed great initiative and problem-solving skills, ensuring the API was developed and integrated effectively to meet my requirements. The project was completed on time, and the final product exceeded my expectations. I highly recommend Neili for any AI or API-related work. Their expertise and professionalism make them a valuable asset to any team or project. I would definitely work with them again in the future!
The freelancer did an excellent job creating my sales chatbot. The bot works perfectly, responds smoothly, and the overall design looks very clean and modern. He understood my requirements, communicated well, and delivered everything on time. One of the best freelancers I’ve worked with — highly recommended!
This isn't my first order with Neili; I've already worked with him on four projects, and every time he delivers outstanding results. Neili created an excellent AI voice communication chatbot for my robot, Trobo. He used ElevenLabs, OpenAI and RAG (retrieval-augmented generation) to build a system that can listen, understand and respond naturally. This project truly brought my robot to life. Neili handled everything from start to finish, and the results were excellent. The AI interaction is smooth, intelligent and reliable, and the overall implementation exceeded my expectations. I fully trusted Neili with the project, and he delivered exactly what I hoped for. This is a very impressive AI project. I highly recommend Neili for advanced AI, voice and robotics-related work, and I will definitely continue working with him again.
This is not my first order with Neili, I have already worked with him on 4 projects, and every time he delivers outstanding results. Neili created an excellent AI voice communication chatbot for my robot, Trobo. He used ElevenLabs, OpenAI, and RAG (retrieval-augmented generation) to build a system that can listen, understand, and respond naturally. This project truly brought my robot to life. Neili handled everything from start to finish, and the results were excellent. The AI interaction is smooth, intelligent, and reliable, and the overall implementation exceeded my expectations. I fully trusted Neili with the project, and he delivered exactly what I hoped for. This is a very impressive AI project. I highly recommend Neili for advanced AI, voice, and robotics-related work, and I will definitely continue working with him again.
Neili created a personal AI chatbot for me exactly the way I imagined. Using OpenAI api, he built a lightweight chatbot that works smoothly without any database. It can remember my three most relevant topics after each conversation and compare them later, making the experience feel smart and personalized. Neili understood my idea instantly and delivered everything super fast. The quality of his work is outstanding—truly impressive. Highly recommended!
I had the pleasure of working with Neili on an AI API project, and I couldn’t be more impressed with the results. Neili demonstrated a strong understanding of both the technical and creative aspects of the project, delivering the work with high quality and attention to detail. Communication was seamless throughout, with quick responses and clear explanations. Neili showed great initiative and problem-solving skills, ensuring the API was developed and integrated effectively to meet my requirements. The project was completed on time, and the final product exceeded my expectations. I highly recommend Neili for any AI or API-related work. Their expertise and professionalism make them a valuable asset to any team or project. I would definitely work with them again in the future!
For all the services Neili has completed for me, 5 stars is not a generic rating. His turnaround time and proficiency in the work he does is 10 stars all the way! Giving him a gig, you can rest assured that you are in good hands.
Neili did an excellent job creating an AI based chatbot for me. The chatbot reads my content accurately and provides exact, relevant answers, which is exactly what I needed. Communication was smooth, delivery was on time, and the quality exceeded my expectation especially since this was my first time working with him. Highly professional and knowledgeable. I will definitely work with Neili again and recommend him to anyone looking for AI chatbot solutions.
The freelancer did an excellent job creating my sales chatbot. The bot works perfectly, responds smoothly, and the overall design looks very clean and modern. He understood my requirements, communicated well, and delivered everything on time. One of the best freelancers I’ve worked with — highly recommended!
I worked with Neili for the first time on developing an MVP for our company, and he delivered outstanding results. He quickly understood our requirements and built an excellent chatbot that perfectly met our needs. The quality of his work was impressive, and communication was smooth throughout the project. I'm already hiring him again for our next AI workflow project. Highly recommended! ❤️
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