Best WhatsApp Business API Providers in the UK

Short answer: for a UK-registered supplier that also does SMS, Esendex. For developers, Twilio or Vonage, both with UK presence. For enterprise scale, Infobip, which lists a London office. For a team inbox across many channels, respond.io or Superchat. For one AI agent on WhatsApp and your phone line, ThinnestAI, whose international workspaces store data in London. Every provider here showed on its own website that it serves UK businesses.

What should a UK business check first?

• Where your data is stored, and who processes it. Ask for both; storage and processing are not always in the same place.
• Billing currency. Some providers bill in pounds, others in euros or US dollars.
• Meta's charges for UK numbers. Meta charges per delivered message, by category and by the recipient's country, and publishes the rates on its pricing page. Ask each provider whether it adds anything.
• Consent for marketing. UK data protection and electronic-marketing rules apply to marketing messages. Collect a clear opt-in and keep a record; that responsibility is yours whichever provider you use.
• Whether you need an inbox, an API or an AI agent. These providers are very different products.

UK providers at a glance

Provider	Best for	UK presence (from its site)	Watch out for
Esendex	UK firms wanting WhatsApp and SMS from one supplier	Registered office in Nottingham	Usage-based pricing; ask for a quote
Twilio	Developers	Twilio UK Limited, London	$0.005 per message on top of Meta's charges; API-first
Vonage	Developers needing SMS fallback	UK site (vonage.co.uk) WhatsApp page	API product
Infobip	Enterprises	London office	Tailored prices and an activation fee
respond.io	Multi-channel sales teams	UK customer case study (Anglo Healthcare)	Priced in USD, metered by active contacts
Superchat	Small businesses on many channels	UK phone number on its site	Priced in euros; 12-month minimum
Wati	WhatsApp-first small teams	Lists the UK among countries for WhatsApp calling	Template messages charged on top
ThinnestAI	One AI agent on WhatsApp and calls	International workspaces store data in London	Billed in US dollars; import your own number for calls

Competitor details from each company's own website, read 24 October 2026. Infobip's pages were read through search results of infobip.com.

UK-based and enterprise suppliers

Esendex

Esendex lists its registered office in Nottingham and offers WhatsApp through an online platform for a quick start or through its API, plus chatbots. Its WhatsApp API page says "pricing is based on usage." Good for a UK business that already sends SMS and wants one supplier.

Infobip

Infobip, an official WhatsApp Business Solution Provider, lists an office in London. Its FAQ positions the WhatsApp Business Platform for medium and large businesses, with tailored prices and a one-time activation fee.

Developer platforms

Twilio

Twilio's legal pages name Twilio UK Limited in London. WhatsApp runs through its Messaging, Conversations, Voice and Senders APIs, and its pricing page lists a $0.005 fee per message, inbound or outbound, with Meta's charges passed through.

Vonage

Vonage has a UK WhatsApp page on vonage.co.uk describing its Messages API with SMS failover and a sandbox for testing, and its support site describes Embedded Sign-Up using a Vonage number or your own.

Team inboxes

respond.io publishes a case study with Anglo Healthcare, a UK education recruiter running WhatsApp, Messenger, Instagram, TikTok and web chat from one inbox; its plans are priced in US dollars. Superchat lists a UK phone number and covers WhatsApp, Instagram, Messenger, Telegram, live chat, email and SMS, with a free plan and paid plans in euros on a 12-month minimum. Wati offers a WhatsApp-first team inbox with Astra AI agents and lists the UK among the countries where its WhatsApp calling works, including outbound.

Where does ThinnestAI fit for UK businesses?

ThinnestAI is an official Meta Tech Provider and works for businesses in any country. A UK workspace stores its data in London; parts of each call are processed outside the UK under UK transfer safeguards, which our data storage post explains. One AI agent answers WhatsApp, your phone line, website chat and Telegram with one memory of each customer, speaks English with a British accent on calls, sends templates and opt-in-only broadcasts, and hands chats to a shared inbox. For phone calls you import your own Twilio, Telnyx or Plivo number; renting a UK number from us is not available.

Where it is not the best fit: billing is in US dollars, not pounds; there is no SMS, Instagram, Messenger or email channel; and there is no visual flow builder. If you need any of those, Esendex, Superchat or respond.io will suit you better.

Which UK provider should you choose?

• One UK supplier for WhatsApp and SMS: Esendex.
• Building it into your own software: Twilio or Vonage.
• Large organisation, many channels: Infobip.
• Small team, many channels: Superchat or respond.io.
• WhatsApp first, simple inbox: Wati.
• An AI agent that answers WhatsApp and the phone: ThinnestAI.

Next step

See what ThinnestAI offers UK businesses on the UK page. If you also plan AI calls, read PECR and TPS rules for AI calls.