If you're going to let an AI agent answer your WhatsApp, the first decision is technical but very much a business one: do you use Meta's official WhatsApp Business API, or connect your usual number by scanning a QR code? Both work, but they're not equally suited to everything. In this guide we explain what each one does, what it requires, what it costs and which is right for you.
Two ways to connect WhatsApp to an AI agent
An AI agent needs to "read" and "write" in your WhatsApp. There are two routes:
- QR connection: the agent is linked to your number as another device, just like opening WhatsApp Web on your computer. You scan a code with your phone and you're done.
- Official API (WhatsApp Business Platform / Cloud API): your number is registered on Meta's platform through a provider, and messages go through the official infrastructure built for businesses.
With AkkaSignal both options are available on every plan, so you don't have to decide forever on day one.
WhatsApp via QR: pros and limits
Connecting WhatsApp by QR is what most small businesses choose to start with, and it makes sense.
Pros:
- It's quick: in about 2 minutes the agent is replying.
- You keep your current number: the same one from WhatsApp or the WhatsApp Business app, with your photo, name and history.
- You keep using your phone: you can read conversations and step in whenever you like.
- No charges from Meta: the WhatsApp Business app is free and there are no per-message fees.
Limits:
- It depends on the phone and the session: if the phone stays offline for a long time or you log out the linked device, you'll need to scan again.
- Not built for high volume: for thousands of daily conversations or several human agents at once, it falls short.
- No official templates: you can't send bulk marketing messages with Meta's backing.
- Unofficial use: it isn't the channel Meta offers for integrations. If it's used for spam or unsolicited bulk messages, the number may be restricted or banned.
That's why we recommend responsible use: the agent replies to people who message you, sends sensible follow-ups to people who have already been in touch, and never mass-messages bought lists.
WhatsApp Business API: pros and requirements
The WhatsApp Business API is Meta's official channel for businesses. Today it's mainly the Cloud API, hosted by Meta, which you access through a provider such as AkkaSignal.
Pros:
- More stable and scalable: it doesn't rely on a phone being switched on and copes with high volumes.
- Multiple agents and teams: designed so the AI and several people can handle chats at the same time.
- Official integration: the channel Meta recognises for businesses, with less risk of restrictions if you follow its policies.
- A verified number is possible: Meta may grant the verified badge to businesses that meet its criteria (it isn't guaranteed).
Requirements:
- A Meta Business account (Business Manager), with the business verified in many cases.
- Registering the number on the platform. Depending on the case, Meta lets you keep using it in the WhatsApp Business app too (so-called coexistence), or you have to stop using it in the app; we'll confirm this when connecting it.
- Following Meta's messaging policies and having your customers' consent.
Message templates
Message templates are texts that Meta reviews and approves before you can use them. They're required whenever your business starts the conversation outside the 24-hour window: an appointment reminder, a free-slot alert or an offer. They can include variables (name, date, time) and buttons.
The 24-hour window
When a customer messages you, a 24-hour customer service window opens. During that time you can reply with free-form messages, no template needed. Once 24 hours have passed since their last message, you can only write to them with an approved template. For an AI agent that replies instantly, most of the conversation happens inside that window.
API pricing
Meta charges for API usage according to its official published rates, which vary by country and message category (marketing, utility, authentication or service). As the rates and billing model change from time to time, we won't quote figures here: check Meta's official rates for your country. With AkkaSignal, official API usage may carry an extra usage-based cost on top of your plan. You can see the plans on our pricing page and a fuller breakdown in how much a WhatsApp chatbot costs.
WhatsApp Business API vs app via QR: comparison
- Setup: QR in about 2 minutes · API needs a Meta Business account and number registration.
- Number: QR uses your current number as it is · API registers the number on Meta's platform.
- Meta fees: QR has no per-message fees · API follows Meta's official rates by country and category.
- Volume: QR suits low to medium volume · API is built for high volume.
- Stability: QR depends on the phone and session · API runs in the cloud, no phone needed.
- Templates and campaigns: QR no · API yes, with Meta-approved templates.
- Verified badge: QR no · API possible if Meta grants it.
- Risk of restrictions: QR higher if misused · API lower if you follow the policies.
Which to choose for your case
- You're just starting or you're a small business: start with QR. In minutes you'll see the agent reply, book appointments and take deposits, with no paperwork.
- You handle a high volume of messages: if you get lots of conversations a day or several people handle chats, the official API will give you stability.
- You're an agency managing many clients: mix and match. Small clients on QR to get going quickly, and the API for those with volume or who want campaigns. You manage it all from the agency panel.
- You need proactive campaigns: if you want to message first (bulk reminders, offers to customers who opted in, win-back), you need the API and its templates.
A restaurant taking bookings, for example, can run perfectly well on QR at first and move to the API if it wants to send event announcements to its customer list.
Can I switch from QR to the API later?
Yes. That's the usual path: start with QR, check that the agent works and customers book, and move to the API when volume or campaigns call for it. In AkkaSignal the agent's setup (business knowledge, calendar, payments and workflows) stays the same; only the channel changes. To see what else you can automate, read our guide to automating WhatsApp Business.
Conclusion
There's no single answer. QR wins on speed and simplicity; the WhatsApp Business API wins on stability, volume and template campaigns. The sensible move is to start with what you need today and leave the door open to switch tomorrow.
With AkkaSignal you get both options on every plan and a 7-day free trial, no card and no lock-in. Get started now and connect your WhatsApp in minutes.