What Is MultiChats? How It Works and What It Costs

In one sentence

Several WhatsApp numbers on one screen and an AI agent on each, which replies the way you would, makes sure nobody is left without an answer or a follow-up, and tells you when someone wants to buy.

How it works

You link your numbers by scanning a QR code. Each number stays on its phone; the inbox is just one more linked device.
You tell us about your business: what you sell, your prices, the usual questions and how you answer them.
The agent gets to work: it reads each message, sorts it (interested, has a question, thinking it over, not interested) and drafts the reply.
You choose the mode for each number: draft (you press send) or automatic.
It hands over to you when someone asks for a call, haggles, complains or is ready to buy.

More detail on how the AI agent works and on running multiple WhatsApp numbers from one inbox.

How WhatsApp is connected, and the risk

MultiChats does not use the official WhatsApp Business API. It links each number like WhatsApp Web, which means no Meta-approved templates and no per-message fees, but it is not an official integration. Meta can restrict or ban a number that sends messages in bulk. MultiChats applies daily caps, pauses between messages, varied wording and an automatic brake if messages stop being delivered, but the risk is not zero and we say so before you start.

What it doesn't do

It doesn't drop prices, promise deadlines or results, or keep messaging people who have said no.
It doesn't send bulk messages or write to strangers.
It doesn't handle Instagram, Messenger or email: only WhatsApp.
It doesn't give medical, legal or financial advice: those questions go to a person.

Who makes it

MultiChats was built by Joan Antoni Grimalt (Toni), the founder of Agendra, a website and booking platform for small businesses in Spain. He was answering hundreds of WhatsApp conversations by hand across four phones and built the tool for himself first. The full story is on our about page.

Pricing

Starter: 1 number, €150 a month. Team: 5 numbers, €500 a month. Business: 10 numbers, €800 a month. Prices exclude VAT, there is no contract and the AI and messages are included. See pricing.

How to get started

You can sign up directly or book a demo using a real conversation from your business. If you'd rather talk first, email hola@agendra.es or message us on WhatsApp.

Frequently asked questions

Is MultiChats an app?

It's a web inbox you open on your computer or phone. Your numbers stay on the phones they are on today.

Which AI does it use?

Anthropic's Claude models. Your conversations are not used to train AI models.

Does it work with WhatsApp Business?

Yes, with both the standard WhatsApp app and the WhatsApp Business app. It does not use the WhatsApp Business API.

Is there a contract?

No. You pay monthly and cancel from the billing portal whenever you like.

Where is MultiChats based?

In Madrid, Spain. It's run under Spanish and EU law, and we work in English and Spanish.

What MultiChats is, and how it works