---
title: "I Will Build a Custom AI Chatbot or WhatsApp AI Chatbot"
url: https://zinnhub.com/zinns/ai-chatbot-development-whatsapp-ai-chatbot-solutions-by-zinn-digital/
description: "Get a fully functional AI chatbot — web, mobile, or WhatsApp — built by senior London-based developers using OpenAI, RAG, and custom LLM integrations, with full source code ownership."
published: 2025-11-24T01:29:46+00:00
modified: 2026-10-19T17:41:02+00:00
language: en-GB
---

# I Will Build a Custom AI Chatbot or WhatsApp AI Chatbot

Looking for a senior AI software developer to build a smart, scalable [chatbot for your](https://zinnhub.com/zinns/botpress-chatbot-development-by-zinn-digital/) web app, mobile app, or WhatsApp channel? You’re in the right place.

We’re senior AI chatbot developers at Zinn Digital®, based in London, England. We specialise in AI chatbot development, ChatGPT integration, custom LLM applications, WhatsApp AI chatbots, Botpress, Discord bots, Telegram bots, ManyChat automation, WhatsApp Business API, and AI SaaS solutions. We build smarter, faster platforms and seamlessly integrate AI into your existing software using OpenAI, Llama, Gemini, Deepseek, Whisper, n8n, Zapier, and Make.com.

\*\*AI Services We Offer\*\*

– AI Chatbot App Development (web, iOS & Android)
 – AI Integrations and Fine-Tuning
 – Custom GPT Applications
 – Vapi AI or Bland Agent Call Bots
 – AI Chatbot Development using OpenAI LLM and ChatGPT
 – AI Applications in Healthcare (App and Website)
 – Integrating Chatbots into Existing Systems
 – Cloud-Based AI Deployment (AWS & GCP)
 – AI SaaS Solutions
 – WhatsApp AI Chatbot via WhatsApp Business API

\*\*Why Choose Zinn Digital®?\*\*

– Extensive AI, mobile, and web development expertise
 – Full, commented source code delivered to you — you own it completely
 – Fast communication and responsive support throughout the project
 – Post-launch assistance available to keep things running smoothly
 – Experience across healthcare, SaaS, e-commerce, and service businesses

\*\*Our Three Tiers at a Glance\*\*

– \*\*Starter\*\* — A streamlined AI [chatbot with](https://zinnhub.com/zinns/create-custom-ai-chatbot-for-any-whatsapp-account/) core features, ready in 4 days. Ideal for MVPs and proof-of-concept builds.
 – \*\*Growth\*\* — Adds Retrieval-Augmented Generation (RAG), multi-language support, and AI model training for more capable, knowledge-driven bots.
 – \*\*Scale\*\* — The full solution: RAG, multi-language support, CRM/database integration, and extensive data fine-tuning with a custom LLM — ideal for production-grade deployments.

\*\*My Process\*\*

1. \*\*Discovery\*\* — Once your order is placed and your requirements are submitted, we review your platform, LLM preferences, and integrations to scope the project precisely.
 2. \*\*Design & Architecture\*\* — We map the conversational journey, data flows, and integration points before writing a single line of code.
 3. \*\*Development\*\* — We build iteratively, keeping you updated through the order manager at each milestone.
 4. \*\*Testing & Refinement\*\* — The chatbot is tested across target platforms and edge cases; revisions are addressed promptly.
 5. \*\*Handover\*\* — You receive the full, commented source code, deployment notes, and a brief walkthrough via the order manager so your team can maintain and extend the bot confidently.

\*\*Important Notes\*\*

– Third-party API costs (e.g., OpenAI, WhatsApp Business API, Vapi) are the client’s responsibility.
 – WhatsApp Business API access requires approval by Meta; we guide you through this but cannot guarantee Meta’s timeline.
 – Scope changes after development begins may affect delivery time and price — these are agreed in writing before any extra work starts.