WhatsApp Business for UK small businesses
One UK business number for calls, SMS and WhatsApp. Messages land in a shared team inbox, AI agents can answer them, and your personal WhatsApp stays personal.
Guided setup from Settings. No code required.
Everything you need to run WhatsApp as a business
A WhatsApp business number, a shared inbox, and AI agents — without the WhatsApp Business app's one-phone limits.
Get WhatsApp Business in 3 steps
Register your number as a WhatsApp sender
Open Settings and follow the guided setup. Line registers your business number on the WhatsApp Business Platform — no code and no developer required.
WhatsApp messages land in your shared inbox
Every WhatsApp conversation appears alongside your SMS and calls, on the same contact timeline. Your whole team sees it, and nothing gets missed.
Reply yourself — or let an AI agent
Answer from the inbox like any other conversation, or let an AI agent handle first replies. The 24-hour window and template rules are handled for you.
Why put WhatsApp on your business number? Because that is where your customers are.
From tradespeople to salons, WhatsApp is where UK customers expect a fast, informal reply. Line makes it a team channel, not a personal one.
Meet customers where they already are
WhatsApp is the most-used messaging app in the UK. A WhatsApp business number lets customers reach you the way they message everyone else.
Get WhatsApp off one person's phone
When business WhatsApp lives on the owner's mobile, replies stop when they do. A shared inbox means anyone on the team can pick up the thread.
Answer after hours
An AI agent can hold the conversation when you are on the tools or closed for the day — and flag anything that needs a human in the morning.
One thread per customer
A customer WhatsApps you, then calls to follow up. The contact timeline shows both, so whoever answers has the full story.
From the guide library
Everything we have written about WhatsApp for UK small businesses.
WhatsApp Business FAQ
Common questions about WhatsApp business numbers and shared inboxes.
What is a WhatsApp business number?
A WhatsApp business number is a dedicated number registered on the WhatsApp Business Platform, so customers can message your business on WhatsApp rather than a personal account. With Line, your UK business number handles WhatsApp, SMS, and voice calls together — customers use one number however they prefer, and everything arrives in the same shared inbox.
Can my whole team share one WhatsApp number?
Yes. Because Line runs on the WhatsApp Business Platform rather than the WhatsApp Business app, there are no linked-device limits. Every team member works from the same shared inbox — you can assign conversations, leave internal notes, and hand off threads without logging each other out.
Do WhatsApp messages arrive in the same inbox as SMS and calls?
Yes. WhatsApp conversations sit alongside your SMS threads and call history in one shared inbox, on one contact timeline. If a customer WhatsApps you and then phones, whoever picks up sees the whole history in one place.
Can AI answer my WhatsApp messages?
Yes. Line's AI agents — the same agent platform that powers web chat and voice — can reply to WhatsApp messages. You choose the mode: triage (sort and route), assist (draft replies for you to approve), or autonomous (answer directly), with approval gates so you decide how much the agent does on its own.
What is WhatsApp's 24-hour customer service window?
When a customer messages you on WhatsApp, you can reply freely for 24 hours from their last message. Outside that window, WhatsApp requires businesses to use pre-approved template messages to start or re-open a conversation. Line tracks the window for you and handles templates, so you never send a message WhatsApp will reject.
Do I need the WhatsApp Business app?
No. Line connects your number directly to the WhatsApp Business Platform, so there is no separate app to install and no phone that has to stay online. You manage WhatsApp conversations from the Line inbox in your browser or the mobile app, alongside everything else.
How do I set up WhatsApp on my Line number?
Open Settings in Line and follow the guided Meta signup. Choose your business account and number, approve the connection, and messages start flowing into your inbox. No code, no developer, no integration project.
Put WhatsApp on your business number
Get a UK business number, connect WhatsApp from Settings, and run every conversation from one shared inbox.
- WhatsApp, SMS, and calls on one UK number
- Shared team inbox — no linked-device limits
- AI agents that can reply on WhatsApp
- 24-hour window and templates handled
- Guided setup from Settings, no code
- No contracts — cancel anytime
Prices exclude VAT. Full pricing
Also explore: WhatsApp Business API · Business SMS · AI receptionist · Shared team inbox