The honest answer to "how much does live chat software cost?" is: anywhere from nothing to thousands of pounds a month, depending on which pricing model you land on and how many of the add-ons you need. The headline number on a vendor's pricing page rarely matches the bill you actually pay. This guide explains the models so you can predict your real cost.
The three pricing models
Per-seat (per-agent)
You pay a monthly fee for each human who can answer chats. Typical range is $15–$120 per seat per month. This model is simple and predictable, and it is great if you have a small, stable team. It gets expensive fast if you have a lot of occasional agents.
Per-conversation or per-resolution
You pay based on how many conversations — or AI-resolved conversations — happen. This has become common for Smart Chatbot pricing. It aligns cost with value, but it can produce nasty surprises during a traffic spike.
Per-message / volume tiers
You pay for a bucket of messages per month (say 1,000, 10,000, 100,000) and upgrade as you grow. This is the model Silux Chat uses, and it tends to be the most predictable for businesses where the bot handles most of the volume. You can see the exact tiers on /pricing.
What UK businesses actually pay
Rough, real-world monthly figures in 2026:
- **Solo founder / side project:** £0 on a free plan.
- **Small UK SME (2–10 staff, 1,000–5,000 chats/month):** £8–£60.
- **Growing business (10–50 staff, heavy AI deflection):** £60–£400.
- **Enterprise (SSO, audit logs, DPA, custom retention):** £500+, often custom-quoted.
The hidden costs nobody puts on the pricing page
- **AI message overages.** Many platforms include a small AI allowance and charge steeply once you exceed it. Always check the overage rate, not just the included amount.
- **Per-seat creep.** Adding agents one at a time feels cheap until you have twelve of them.
- **Integrations gated behind higher tiers.** The WhatsApp channel, the CRM sync, or the API you need is often two tiers up from where you started.
- **Removing vendor branding.** Frequently a paid-only feature.
- **Data residency and a DPA.** On some platforms these are enterprise-only, which can quietly triple your cost if you are a compliance-sensitive UK business. On Silux Chat the DPA is available without an enterprise contract — see /uk for why UK data residency is part of the default.
How to estimate your real bill
Work it out in three steps:
- Estimate your monthly conversation volume (look at your current email and phone enquiry counts as a proxy).
- Estimate the share a bot can deflect — for most SMEs that is 60–80% of routine questions.
- Price the plan whose included volume covers the deflected share, then add seats for the humans who handle the rest.
For most small UK businesses doing a few thousand chats a month, the all-in figure lands between £10 and £70, and the time saved pays for it inside the first month.
The bottom line
Do not anchor on the lowest advertised price. Anchor on what the bill looks like at 10× your current volume, with the integrations and the DPA you actually need included. A platform with predictable volume tiers and no enterprise paywall on compliance features — like Silux Chat — usually beats a cheap-looking per-seat plan once you account for the add-ons. Compare the full picture on /pricing before you decide.
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