If you answer customers by hand, with one or two people and no connected systems, the free WhatsApp Business app is enough. If you want a chatbot, a team sharing one inbox or sending at scale, you need the WhatsApp Business API, which you use through a platform and which charges per message. You can run both on the same number at the same time.
What the free app gives you
The WhatsApp Business app is the one you download on your phone. It is built for a business that talks to customers manually. According to the official WhatsApp Business page, it includes:
- Quick replies. Shortcuts for the questions you repeat.
- Labels. To sort chats by status, for example “quoted” or “paid”.
- Greeting and away messages. Fixed automatic replies that do not understand what the customer asks.
- Catalog. To show your products with photos and prices.
- App broadcasts. One-to-one messages to several people at once, available to eligible users in select countries.
- Meta Verified. A subscription that adds a verified badge, impersonation protection, priority support and up to 10 linked devices and agents.
The official page publishes no numeric caps for these features. If your operation depends on a limit, check it in the app itself.
What the API adds
The WhatsApp Business API is not an app. It is a connection Meta offers so a system can send and receive messages from your number. You use it through a platform. This is what changes:
Team
Several agents and a shared inbox
The platform gives you an inbox where your team sees the same conversations, assigns them and replies.
Automation
Chatbots and integrations
An AI chatbot that answers open questions and connects to your booking system, your CRM or your store.
Messages
Approved templates
To write first, outside the 24-hour window, with messages Meta approves before you send them.
Templates and the 24-hour window
When a customer writes to you, a 24-hour window opens. Inside it you can reply with free-form messages: text, images, buttons and more. Once the window closes, you can only send templates approved by Meta, and the customer must have opted in to hear from you. How they are written and classified is in the guide to WhatsApp message templates.
Sending limits
On the API, Meta caps how many different people you can message outside a 24-hour window. A new portfolio starts at 250 different people per 24 hours and can rise up to unlimited. Since 8 October 2025 the limit is set per business portfolio, not per number. Messages inside an open 24-hour window do not count toward this limit. The details are in the guide to WhatsApp bulk messages.
What the API costs
The app is free. The API is not, but the cost is low if your chatbot mostly replies. Since 1 July 2025 Meta charges per delivered message, by category and by the customer’s country, and messages the customer sends you are free. Since 1 October 2026 it also charges for replies inside the 24-hour window, with a free tier of 1,000 service messages a month per number.
With Meta’s rates in force since 1 October 2026 (checked on 30 September), a service or utility message costs US$0.0008 in Colombia, US$0.0085 in Mexico, US$0.026 in Argentina, US$0.02 in Chile, US$0.03 in Peru and US$0.0068 in Brazil. What weighs most is the marketing template: US$0.0125 in Colombia and US$0.0397 in Mexico. For your country and volume, use the WhatsApp API cost calculator. For the full cost with a chatbot service included, see the Spanish guide on what a WhatsApp AI chatbot costs.
Side by side: app and API
With a platform
WhatsApp API
Free
WhatsApp Business app
With a platform
WhatsApp API
- Cost
- Meta charges per delivered message, plus the platform
- Team
- Several agents in a shared inbox
- AI chatbot
- Yes, connected to your systems
- Writing first
- Approved templates, within your sending level
- Integrations
- Bookings, CRM, store
- Who runs it
- A platform or a service
Free
WhatsApp Business app
- Cost
- No message fees
- Team
- Built for handling chats by hand from a phone
- AI chatbot
- Only fixed automatic replies
- Writing first
- App broadcasts, in select countries
- Integrations
- No
- Who runs it
- You, from your phone
Signs you have outgrown the app
One for each type of business:
- Hotel. Guests write at eleven at night asking about check-in and availability, and nobody answers until morning. With the API, a chatbot replies using data from your booking system and passes to a person whatever it cannot resolve. More on chatbots for hotels.
- Real estate. Each project has its own prices and unit types, and leads arrive from ads at all hours. Three agents on one number need to see the same chat and know who has already replied. More on chatbots for real estate.
- Online store. Telling a customer an order shipped, recovering a cart or reminding someone to reorder means writing first and at scale. That means templates, which are part of the API. More on chatbots for e-commerce.
If you recognise one of these, you have crossed the line.
If you already use the app
You do not have to give up the app to use the API. With coexistence, the same number works in the app and on the API at once, and the last six months of chat history sync. The details, what you lose and the requirements are in the guide to WhatsApp coexistence.
How Manoflow helps
Manoflow connects your number to the API, builds the AI chatbot for your hotel, real-estate business or store, and gives your team an inbox where they can take over a conversation when needed. We can connect your current number, and your team can keep replying from the WhatsApp Business app. To see what fits you, book a call.