In the UK, a WhatsApp chatbot typically costs £15–£50 a month on a DIY platform (plus Meta’s per-message fees), £1,500–£15,000 up front plus a monthly retainer from a done-for-you agency, or around £50 a month per assistant with no build fee for a managed assistant like NZT Digital. The right figure depends on whether you build and maintain it yourself or have it built, connected and run for you.
The three pricing models
| Model | Upfront | Ongoing | Extra fees |
|---|---|---|---|
| DIY platform | £0 | £15–£50/mo | Meta per-message; per-seat / per-contact at higher tiers |
| Agency build | £1,500–£15,000 | £75–£1,000/mo | Change requests; Meta fees |
| NZT Digital — internal assistant | £0 | £50/mo per assistant | None — flat monthly |
| NZT Digital — customer-facing | Quoted | Quoted | Quoted up front, no surprises |
The hidden cost everyone forgets: Meta’s fees
The official WhatsApp Business Platform charges per conversation, set by Meta, on top of whatever your tool or agency charges. DIY platforms almost always pass this straight through to you, and it scales with volume. It is rarely large for a small business, but it is real — and it is why a "£19/month" plan is never quite £19/month. With a managed assistant these costs are accounted for up front so there is no surprise on the bill.
Watch the metered add-ons
Many platforms look cheap at the headline price, then meter you as you grow: per seat, per contact, per conversation, or per AI "resolution". For a growing business those add up unpredictably. A flat per-assistant price is easier to budget — you know exactly what next month costs.
What makes it worth the money?
- It removes paid work — a job a person currently does (a lookup, a quote, a booking) happens automatically.
- It is connected to your data — real prices and availability, not generic answers.
- It is maintained — someone keeps it working as your prices, stock and team change.
Judged that way, the question is less "what does a chatbot cost" and more "what does the job it does cost me today" — and a £50/month assistant usually compares very well to an hour or two of someone’s time each week.
So what should you budget?
If you want to tinker and keep it cheap, budget £15–£50/month for a DIY tool plus a little for Meta fees, and your own time. If you want it built and run for you without a big upfront bill, budget £50/month per internal assistant, and ask for a quote on anything customer-facing. Either way, see how the providers stack up in our 2026 comparison.
Frequently asked questions
How much does a WhatsApp chatbot cost in the UK?
Roughly: DIY platforms £15–£50/month plus Meta per-message fees; done-for-you agency builds £1,500–£15,000 up front plus £75–£1,000/month; managed assistants around £50/month per assistant with no build fee. The right number depends on whether you build it or have it built and run for you.
Are there hidden fees with WhatsApp chatbots?
Often, yes. The main one is Meta’s per-conversation charge on the WhatsApp Business Platform, which most DIY tools pass straight through. Watch also for per-seat, per-contact and per-resolution add-ons that scale up as you grow.
Is a WhatsApp chatbot worth the money?
It is when it removes a job you currently pay someone to do — a live price lookup, a payment link, a booking. A bot that only deflects FAQs rarely pays back; one wired into your real systems usually does.
Why does NZT Digital not charge a build fee?
Because we run the assistants ourselves on shared infrastructure, we can build and manage an internal assistant for a flat £50/month rather than a large one-off build fee. Customer-facing assistants, which are more bespoke, are quoted separately.