The short answer
The WhatsApp Business app is free. The WhatsApp Business Platform, which most people call the API, is charged by Meta per message delivered, and most businesses reach it through a vendor who adds their own fee.
If you searched for conversation-based pricing, that model has ended. Meta's page on it now says it "was replaced by per-message pricing on July 1, 2025". Articles that still explain 24-hour conversations as the unit you pay for are out of date.
The rules below come from Meta's developer pricing page, last checked 1 October 2026. WhatsApp's platform pricing page still said service replies aren't charged on that date; the developer page and its October rate cards are newer. Meta can change pricing on the first day of any quarter, so check before you commit.
What conversation-based pricing was
Under the old model, you paid per conversation, not per message. A conversation was a 24-hour thread, opened when your message was delivered and labelled with a category: marketing, utility, authentication or service. Send five marketing messages to one person within the same 24 hours, and you paid for one marketing conversation.
That's why so many older guides talk about "conversations". If you're reading an old invoice, that's the model it used.
How pricing works now
Since 1 July 2025, Meta charges per message delivered. Until 30 September 2026 that meant template messages only. Since 1 October 2026, service messages are charged too, after a free monthly tier. Three things set the price:
- The message's category: marketing, utility, authentication or service.
- The country code of the phone number you're sending to.
- Your volume, for utility and authentication messages, which get cheaper rates in higher tiers.
WhatsApp's pricing page adds that the charge is made when a message is delivered, not when it's sent. It also has a rate tool where you pick your market, currency and category to see the current rate. Use that, or the rate cards on the developer page, rather than a number from a blog post.
The four message categories
- Marketing: offers, promotions, product news, abandoned cart reminders.
- Utility: messages triggered by something the customer did, like an order confirmation or a delivery update.
- Authentication: one-time passwords.
- Service: your replies to customers who've messaged you.
Marketing, utility and authentication messages are sent as templates, which Meta approves in advance. Service messages are ordinary replies.
The 24-hour rule
This is the rule that shapes most bills. When a customer messages you, a 24-hour customer service window opens. WhatsApp's pricing page says the window "resets with each user message".
Inside the window, you can send any kind of message: text, photos, documents, a normal reply. Outside it, you can only send an approved template.
So the 24-hour rule isn't mainly about price. It's about what you're allowed to send. If a customer last wrote to you three days ago, you can't just type "Hi, any thoughts on the quote?" through the API. You need a template, and templates are what cost money.
What's free and what's charged
As of 1 October 2026, per Meta's developer page:
| Message | Charged? |
|---|---|
| Messages a customer sends you | No |
| Your non-template replies inside the 24-hour window | The first 1,000 a month per number, no; after that, yes |
| Utility templates sent inside the 24-hour window | Yes, since 1 October 2026 |
| Marketing templates | Yes, every one delivered |
| Utility templates outside the window | Yes |
| Authentication templates | Yes |
| Any message within 72 hours of a customer messaging you from a click-to-WhatsApp ad or a Facebook Page button | No |
That last row is the free entry point. The platform pricing page says that when customers message you from an ad that clicks to WhatsApp or a Facebook Page call-to-action button, "for the following 3 days (72 hours), all of your messages are not charged".
What changed on 1 October 2026
Meta's developer pricing page lists two changes that started on 1 October 2026:
- Service messages are charged per message, at the same rate as utility and authentication in each market. Each business phone number gets a free tier of 1,000 delivered service messages a month. The free tier resets monthly and doesn't roll over.
- Utility templates sent inside the 24-hour window are charged too. They were free from 1 July 2025 to 30 September 2026.
For a small business answering enquiries, that first change is the one to watch. Replies that cost nothing before now cost something once a number sends more than 1,000 service messages in a month. In Singapore, Meta's rate card effective 1 October 2026 lists S$0.0937 per marketing message and S$0.0205 per utility, authentication or service message (US$0.0732 and US$0.016), before volume tiers. Checked 1 October 2026; other markets are on the same page.
How vendors add their fees
WhatsApp's help centre says you can reach the Platform "directly or work with a Business Solution Provider". That page is also where WhatsApp says the Business app is free to download and free to use.
Most small businesses use a vendor, because going direct means building on Meta's Cloud API yourself. Vendors charge in different ways. The common ones are:
- A monthly subscription per user or per number, with Meta's message charges passed through at cost.
- A markup on each message, on top of Meta's rate.
- A bundle: a monthly fee that includes a set number of messages.
Meta's rate for a message is the same whichever vendor you use. What changes is what the vendor adds. So when someone asks for the cheapest WhatsApp Business API, the honest answer is: compare vendors on their own fee and what's included, and read their pricing page for whether Meta's charges are passed through at cost or marked up. Check the current price on each vendor's own site.
How to keep the bill down
- Get customers to message you first. A click-to-chat link or QR code opens the 24-hour window, and your first 1,000 replies inside it each month are free. The WhatsApp link generator makes one.
- Reply inside the window. If a customer writes at 10am, answer that day, not the next morning, while you can still send a plain reply.
- Send marketing templates only to people who asked for them. Every one delivered is charged, and unwanted ones get you blocked.
- Check your template categories. Meta says businesses are responsible for the category on their approved templates, and a template marked marketing is charged as marketing.
- Use ads that click to WhatsApp for campaigns. The 72-hour free entry point covers your follow-up messages.
- Watch the 1,000 free service messages a month. If a busy number goes past that, each extra reply is charged at your market's service rate.
Do you need the API at all?
Many small teams don't. The API makes sense when you send order updates, reminders or promotions to thousands of people through software, or need many agents and automation on one number.
If most of your WhatsApp is people messaging you and you replying, the free Business app covers it. It lets you use up to four linked devices and one phone at a time, according to WhatsApp's help centre. WhatsApp Business multiple users covers how a team shares one number, and what is WhatsApp Business? compares the app and the Platform side by side.
Meta also lets a business connect an existing Business app number to the Platform and keep using the app. Its developer page on this says messages sent from the app stay free, while messages sent through the Platform are charged.
Made-up example: a small furniture shop gets about 400 WhatsApp enquiries a month and is deciding whether to move to the API through a vendor.
Week 1: the owner lists what they send. Almost all of it is replies to customers who wrote first, plus about 150 delivery updates a month and a monthly promotion to 600 past buyers who asked to hear about sales.
Week 2: she looks at Meta's rate card for her market. Replies inside the 24-hour window are free for the first 1,000 a month per number. The delivery updates would go out as utility templates, many of them days after the customer's last message, so they'd be charged. The promotion is 600 marketing templates, all charged.
Week 3: she gets quotes from two vendors. One charges a monthly fee and passes Meta's rates through. The other adds a markup to every message. For her volume, the first is cheaper.
Week 4: she decides the API is worth it only for the delivery updates and the promotion. She keeps answering enquiries in the Business app, and notes that her replies through the API would count against the 1,000 free service messages.
If your team mostly answers people who message you first, you may not need the API at all. ActivityTracker's team inbox puts every WhatsApp number you use in one place, shows who's waiting, lets you assign a chat to a teammate, and lands every chat on the client's record.
What to do first
- Count last month's WhatsApp messages by type: replies, updates, promotions, one-time codes.
- Open WhatsApp's pricing page and look up the rate for each category in your market.
- Work out which of your messages would fall outside the 24-hour window.
- Ask each vendor you're considering how they charge, and whether Meta's charges are passed through at cost.
- If almost everything is replies to people who wrote first, stay on the Business app for now.
Keep reading
Questions people ask
Sources
- Meta for Developers, Pricing on the WhatsApp Business Platform, with the rate cards effective 1 October 2026, read 1 October 2026
- Meta for Developers, Conversation-based pricing (deprecated), read 28 September 2026
- WhatsApp Business Platform pricing, read 28 September 2026
- WhatsApp Help Center, About WhatsApp Business products, read 28 September 2026
- WhatsApp Help Center, About linked devices on the WhatsApp Business app, read 28 September 2026
- Meta for Developers, Onboard WhatsApp Business app users, read 28 September 2026