How much does a basic AI chatbot cost?

A basic AI chatbot that handles FAQs and simple queries costs between £2,000 and £5,000 for a custom build. Off-the-shelf platforms like Intercom, Tidio, or Chatling charge £50-200/month with limited customisation. Free options exist (Chatbase free tier, Botpress community) but lack business features and compliance controls.

Why are custom AI chatbots so expensive?

They're not, relative to what they replace. A custom chatbot at £5,000 that handles 60% of your customer queries saves you one part-time hire — that's £12,000-£15,000/year. The cost comes from integration with your systems (CRM, databases, order management), training on your specific data, and building in compliance requirements like DPIAs and proper data handling.

What's the ongoing cost of running an AI chatbot?

LLM API costs (the AI processing) typically run £50-300/month depending on conversation volume. Hosting adds £20-100/month. If you're on a platform like Intercom, you pay their monthly subscription instead. Custom builds have lower ongoing costs but higher upfront investment. Total ongoing cost for most SMEs: £100-400/month.

Can I build an AI chatbot for free?

You can build a basic one for free using platforms like Botpress, Chatbase (free tier), or open-source tools like Rasa. But free tiers have conversation limits, lack business integrations, offer minimal compliance controls, and typically show the platform's branding. For anything customer-facing at a business level, you'll need to spend money — the question is how much.

What's cheaper — building a custom chatbot or using a platform?

Platforms are cheaper in year one. A £150/month platform costs £1,800/year. A custom build costs £3,000-£8,000 upfront. But by year two, the custom build is often cheaper — ongoing costs are lower (just API fees and hosting), you own the system, and you're not locked into monthly subscriptions. Plus, custom builds include compliance documentation that platforms don't.

How Much Does an AI Chatbot Cost? Real Pricing Breakdown for 2026

You want an AI chatbot for your business. The first question is always the same: how much is this going to cost me?

The honest answer: it depends, but not in the vague way most agencies mean. There are a finite number of variables that determine cost, and once you understand them, you can get to a real number pretty quickly.

Here's the full breakdown. No ranges so wide they're useless. No "contact us for a quote" until you understand what you're buying.

The Quick Answer

What You Want	Cost Range	Ongoing Costs
Free chatbot tool (basic)	£0	£0 (with limits)
Platform subscription (Intercom, Zendesk AI, Tidio)	£0 upfront	£50-300/month
Custom chatbot — FAQ only	£2,000-£5,000	£50-150/month
Custom chatbot — CRM integrated	£5,000-£8,000	£100-250/month
Custom chatbot — full system + compliance docs	£8,000-£12,000	£150-400/month

Those are 2026 UK market rates for SME-scale projects. Enterprise pricing is different (and higher). Agency rates vary — some charge more for less.

What Determines the Price

1. Complexity — What Does It Need to Do?

Simple (£2,000-£5,000): Answers questions from a fixed knowledge base. Your FAQs, product info, policies, opening hours. Customers type a question, the chatbot finds the answer. No system integration.

Medium (£5,000-£8,000): Everything above plus connection to your CRM, order management system, or booking platform. The chatbot can look up an order, check appointment availability, or pull customer records. It hands off to a human agent when it's out of its depth.

Complex (£8,000-£12,000): Full custom workflow. Multiple data sources, conditional logic, multilingual support, analytics dashboard, complete compliance documentation. The chatbot is essentially a new customer service channel that integrates with everything else you run.

2. Integration — What Does It Connect To?

Every system your chatbot needs to talk to adds cost:

Website widget only — included in base price
CRM integration (HubSpot, Salesforce, Pipedrive) — adds £1,000-£2,000
E-commerce platform (Shopify, WooCommerce) — adds £500-£1,500
Booking system — adds £500-£1,000
Payment processing — adds £1,000-£2,000
Custom API/database — adds £1,000-£3,000

The more integrations, the more testing, the more edge cases, the more cost.

3. The AI Model — What Powers It?

The "brain" behind your chatbot matters. Options in 2026:

Cloud LLMs (OpenAI GPT-4o, Anthropic Claude, Google Gemini):

Best quality responses
API costs: £0.01-0.06 per conversation (varies by length)
Data leaves your infrastructure (GDPR implications)
Requires a Data Processing Agreement with the provider

Open-source models (Llama, Mistral, hosted locally):

Good quality, slightly behind the leaders
No per-conversation API cost (you pay for hosting instead)
Data stays on your servers (easier GDPR compliance)
Hosting costs: £50-200/month for adequate compute

Hybrid approach:

Use a local model for standard queries, cloud LLM for complex ones
Best balance of cost, quality, and compliance
More complex to build (adds £1,000-£2,000)

For most SMEs, a cloud LLM with a proper DPA is the pragmatic choice. The per-conversation cost is negligible unless you're handling thousands of chats per day.

4. Compliance — What Regulations Apply?

This is the cost most agencies don't mention until you ask.

If your chatbot processes personal data (it does — names, email addresses, conversation content are all personal data under GDPR), you need:

Data Protection Impact Assessment (DPIA): £1,500-£3,000 if done separately, typically included in a custom build
Data Processing Agreements: with your LLM provider and any third-party services — usually free but need expert review
Privacy notice updates: your website needs to explain AI processing to users
Transparency measures: telling users they're talking to an AI (required under the EU AI Act from August 2026)

Most off-the-shelf platforms leave all of this to you. A good custom builder includes it in the price.

What happens if you skip compliance? The ICO fined MediaLab.AI £247,590 for running an AI system without proper data protection measures. GDPR fines go up to €20 million. The AI Act adds fines up to €35 million. For an SME, even a small regulatory action can be devastating.

Platform vs Custom: The Real Comparison

Platform (Intercom, Zendesk AI, Tidio, Chatling)

Upfront cost: £0 (monthly subscription model) Monthly cost: £50-300/month depending on features and conversation volume Year 1 total: £600-£3,600

What you get:

Quick setup (days, not weeks)
Pre-built templates and flows
Basic analytics
Regular updates from the vendor

What you don't get:

Deep integration with your specific systems
Control over where data is processed
Compliance documentation
Ownership — you're renting, not buying
Customisation beyond what the platform allows

Hidden costs:

Per-conversation fees above your tier limit
Premium features locked behind higher tiers
Migration costs when you outgrow the platform
Separate compliance costs (DPIA, legal review)

Custom Build

Upfront cost: £2,000-£12,000 Monthly cost: £50-400/month (hosting + API fees) Year 1 total: £2,600-£16,800

What you get:

Built for your exact workflow
Integrates with your existing systems
You own it — no monthly subscription to a platform
Compliance built in from day one (DPIA, DPAs, transparency)
Full control over data flows and hosting location

What you don't get:

Instant setup — custom builds take 2-6 weeks
Automatic updates — maintenance is on you (or your builder)
A community of other users with shared templates

The Break-Even Point

A £150/month platform costs £1,800/year. A £5,000 custom build with £150/month running costs totals £6,800 in year one but £1,800 in year two and beyond.

Custom build breaks even in year 2-3 for most SMEs. If you're planning to use an AI chatbot for more than 18 months (you should be), custom is almost always cheaper long-term.

What Most Agencies Don't Tell You

1. Ongoing Costs Are Real

Your chatbot isn't a one-off purchase. You'll pay for:

LLM API usage: £50-300/month (scales with conversation volume)
Hosting: £20-100/month
Maintenance/updates: 2-4 hours per quarter (£200-£500/quarter if outsourced)
Knowledge base updates: whenever your products, prices, or policies change

Budget for £100-400/month ongoing after the initial build.

2. Training Data Quality Matters More Than the AI Model

The most expensive AI model in the world gives bad answers if it's trained on bad data. Before you build anything:

Clean up your FAQ document
Make sure your product information is accurate and current
Document your policies clearly
Organise your knowledge base

This prep work is free but determines whether your chatbot is helpful or embarrassing.

3. You Need a Plan for When It Gets Things Wrong

AI chatbots hallucinate — they make things up with confidence. Your chatbot will occasionally give wrong answers. You need:

A human handoff trigger for low-confidence responses
Conversation logging so you can review what went wrong
A feedback mechanism for customers to flag incorrect answers
Regular review of conversations to improve the knowledge base

Any quote that doesn't include these safeguards is selling you a liability.

4. Cheap Builds Often Cost More in the End

A £1,000 chatbot from a freelancer on Fiverr might work initially. But when it breaks, when you need to add features, when you get a GDPR subject access request and can't find the data, when a customer complains about an AI interaction and you have no logs — that £1,000 build becomes very expensive very quickly.

The right question isn't "what's the cheapest way to build this?" It's "what's the total cost of ownership over 2-3 years?"

Real Examples: What Businesses Are Paying

Local estate agent — FAQ chatbot: Property listings, viewing bookings, mortgage calculator FAQ. Basic build, website widget only. Cost: £3,000. Running costs: £80/month. Handles 40% of enquiries automatically.

E-commerce brand — customer service bot: Order tracking, returns processing, product recommendations. Integrated with Shopify and email. Cost: £6,500. Running costs: £200/month. Reduced customer service tickets by 55%.

Professional services firm — intake and qualification: Client enquiry qualification, document collection, appointment scheduling. CRM integrated with compliance documentation. Cost: £9,000. Running costs: £180/month. Eliminated one part-time admin role.

These are representative of UK SME pricing in 2026. Your specific project may be more or less depending on the variables above.

How to Get an Accurate Quote

When you approach a chatbot developer, come prepared with:

What do you want it to do? List the specific tasks, not "I want a chatbot"
What systems does it need to connect to? CRM, order management, booking, etc.
How many conversations per day/week? This affects API costs
What data will it access? Customer names, order history, payment info?
Where are your customers? EU customers mean GDPR applies, even if you're outside the EU
Do you need compliance documentation? DPIA, DPAs, privacy notice updates?

A good builder will give you a fixed-price quote based on these answers. If someone can't quote without weeks of "discovery," they either don't know what they're doing or they're planning to bill by the hour.

The Bottom Line

An AI chatbot costs between £0 and £12,000 depending on what you need. For most SMEs, the sweet spot is a custom build in the £3,000-£8,000 range that handles your specific workflows, integrates with your systems, and comes with the compliance documentation you need.

Don't buy the cheapest option. Don't buy the most expensive option. Buy the one that solves your actual problem and doesn't create a regulatory one.

Want a straight answer on what your chatbot would cost? Get in touch. We'll scope your project, give you a fixed-price quote, and include the compliance documentation so you're covered from day one.