--- title: "WhatsApp 101: the Business app, the Business Platform and the rules between them" summary: "What WhatsApp offers businesses in October 2026: the free Business app for one team on one phone, the Business Platform for systems and scale, how the 24-hour window and templates work, what Meta charges since the October 2026 changes, and where the channel fits." canonical: https://cpaas.co/en/learn/whatsapp-101 kind: explainer depth: foundation origin: original published: 2026-10-13T16:26:18.899Z updated: 2026-10-14T16:26:19.747Z topics: ["WhatsApp", "Messaging", "Fundamentals"] language: en --- # WhatsApp 101: the Business app, the Business Platform and the rules between them WhatsApp is a messaging app that more than 3 billion people use every month.[^1] For a business it is two different things that share a name: a free app for answering customers by hand, and a platform that connects WhatsApp to a company's own systems. This primer explains both, as of October 2026. ## At a glance ```diagram:compare | WhatsApp Business app | WhatsApp Business Platform What it is | A free app for a small business, used like WhatsApp on a phone | Access through an API, so your systems, inbox and bots can send and receive Who runs it | Meta | Meta hosts it (the Cloud API); most businesses connect through a provider Who may start a conversation | The customer, or the business with the customer's permission | The customer; the business only with an approved template once the 24-hour window has closed How it is priced | Free to download and use | Per delivered message, by message category and the recipient's country Best for | One team answering a manageable number of chats | Notifications, support at volume, automation and AI agents Avoid for | Bulk sends and anything that needs an audit trail | Unsolicited marketing, and markets where few people use WhatsApp > As of October 2026. Sources: Meta's WhatsApp Business pages and developer documentation. ``` - **Who owns it:** Meta, which agreed to buy WhatsApp in February 2014.[^7] - **Reach:** more than 3 billion people use WhatsApp each month, Meta said in April 2025, including more than 100 million in the United States.[^1] - **The defining rule:** the [customer service window](/en/learn/glossary#customer-service-window). When a customer writes, the business may reply freely for 24 hours; after that it may only send a pre-approved [message template](/en/learn/glossary#message-template).[^2] - **The price model:** per delivered message, set by category (marketing, utility, authentication, service) and the recipient's country.[^2] ## How it works WhatsApp is an [OTT](/en/learn/glossary#ott) app: it carries messages over the internet rather than through a mobile operator's SMS network. A business reaches it in one of two ways. **The WhatsApp Business app** is a separate free app for small businesses. It launched in January 2018 with a business profile and tools such as quick replies, greeting messages and away messages.[^5] There is no API, no rate card and no template review, but also no way to plug it into a CRM or let a system send on its own. **The [WhatsApp Business Platform](/en/learn/glossary#whatsapp-business-platform)** is the route for everything else. A business registers a phone number to a WhatsApp Business Account and connects it through an [API](/en/learn/glossary#api). Since May 2022 Meta has hosted that API itself, as the Cloud API, open to any business.[^8] Most companies use a provider (a "Business Solution Provider") that adds an inbox, templates management and billing; some integrate directly. ```diagram:path # How a message travels on the Business Platform Your system | Decides to send: a reply inside the window, or a template outside it | A request to the Cloud API Provider or direct integration | Adds your account details and checks the template is approved | The message, through Meta's API Meta's Cloud API | Checks the window, the template, your messaging limit and the person's limits | The message to the WhatsApp network The customer's phone | Delivers it; read status returns if the person allows read receipts | Status updates back to you as webhooks > Replies travel the same path in reverse: the customer's message reaches your system as a webhook. ``` Three rules shape every send on the Platform: 1. **The 24-hour window.** It opens when the customer writes and lasts 24 hours from their latest message. Inside it you may send anything the policy allows, in your own words. A call from the customer, or a customer accepting your call, also opens or refreshes it.[^12] The detail is in [the 24-hour window](/en/learn/the-24-hour-window). 2. **Templates.** To write first, or after the window closes, you send a template that Meta has reviewed and filed under a category. Meta can move a template to the category it thinks fits.[^9] How to design a set is in [WhatsApp template strategy](/en/learn/whatsapp-template-strategy). 3. **Limits.** A new number may start conversations with only a limited number of people per day, a messaging limit that rises with good quality.[^11] Separately, Meta caps how many marketing templates one person receives from businesses overall, so a marketing send can fail even when everything on your side is in order.[^10] Replies come back as [webhooks](/en/learn/glossary#webhook): your system is called each time a customer writes or a status changes. The Platform also carries voice calls: since 2025 businesses can receive WhatsApp calls through the API, and in many countries place them.[^12][^14] ## A short history When Facebook agreed to buy it in February 2014, for about $16 billion plus $3 billion in restricted stock, it had more than 450 million monthly users.[^7] The business products came later and in stages. ```diagram:timeline # WhatsApp for business, from app to platform February 2014 | Facebook agrees to buy WhatsApp | More than 450 million monthly users at the time January 2018 | WhatsApp Business app | Free, Android first, in five countries August 2018 | The Business API | For larger companies, charging for slow replies May 2022 | Cloud API open to any business | Hosted by Meta April 2025 | More than 3 billion monthly users | Over 100 million in the United States July 2025 | Per-message pricing; business calling | Billing by message replaces billing by conversation January 2026 | General-purpose AI chatbots barred | Customer-service AI is not affected June 2026 | Usernames can be reserved | And EU interim measures on AI access October 2026 | Service messages charged again | 1,000 free per number each month > Sources: Meta's newsroom, investor materials and developer documentation, the European Commission and TechCrunch. ``` The Business app arrived on 18 January 2018, free on Android in Indonesia, Italy, Mexico, the United Kingdom and the United States first.[^5] In August 2018 WhatsApp opened a Business API for larger companies and, for the first time, charged businesses, notably for replies sent long after a customer wrote.[^6] For four years the API ran on servers the business or its provider operated; in May 2022 Meta opened its own hosted Cloud API to any business.[^8] Pricing changed shape twice. Until mid-2025 Meta billed per 24-hour "conversation". On 1 July 2025 it moved to billing per delivered template message.[^2] Service messages, the free-form replies inside the window, had been free since 1 November 2024; from 1 October 2026 they are charged again, beyond a free monthly allowance.[^3] The 2025–2026 period also brought business voice calling,[^14] a policy that barred general-purpose AI chatbots from the Platform from 15 January 2026,[^15] and usernames, which people could start reserving on 29 June 2026.[^23] ## Where it is used WhatsApp is a global app, but its weight differs sharply from one market to the next, and Meta does not publish user numbers by country in its results. What Meta has said: - **Worldwide:** more than 3 billion monthly users, in April 2025.[^1] - **The Americas:** more than 100 million users in the United States (April 2025).[^1] Two platform rules make the US different: Meta does not currently deliver marketing templates to US phone numbers,[^10] and business-initiated calls are not available in the United States or Canada.[^12] Mexico was one of the five launch markets for the Business app.[^5] In Brazil, WhatsApp excluded the country from its ban on general-purpose AI chatbots after an order from the competition authority.[^19] - **Europe:** the Business app launched in Italy and the United Kingdom first.[^5] The EU has designated WhatsApp a "gatekeeper" messaging service, which brings specific obligations (see Rules and regulation).[^20] - **Middle East and Africa:** business-initiated calling is not available in Egypt or Nigeria, among other countries, though messaging is.[^12] Readers in the Gulf will find more on local rules in [regional messaging in the Gulf](/en/learn/regional-messaging-in-the-gulf). - **Asia-Pacific:** Indonesia was a launch market for the Business app;[^5] business-initiated calling is not available in Vietnam.[^12] Measure the share of your own customers who use WhatsApp; a global figure says little about one country. ## What businesses use it for The channel suits conversations a customer expects or starts: - **Customer [support](/en/ecosystem/use-cases/support)**, where the customer writes first and the reply is free-form inside the window. - **[Notifications](/en/ecosystem/use-cases/notifications)**: order, delivery, payment and appointment updates, sent as utility templates. With **[booking](/en/ecosystem/use-cases/booking)** and **[no-show](/en/ecosystem/use-cases/no-shows)** reminders, the customer can reply in the same thread. - **One-time passcodes ([OTP](/en/ecosystem/use-cases/otp))**, sent as authentication templates. - **[Sales](/en/ecosystem/use-cases/sales) and [commerce](/en/ecosystem/use-cases/commerce)**: questions before purchase, catalogues and click-to-WhatsApp ads that open a conversation. - **[Marketing](/en/ecosystem/use-cases/marketing)** to people who have opted in, sent as marketing templates and subject to per-person limits.[^10] - **[Chatbots](/en/ecosystem/use-cases/chatbot) and AI agents.** Meta made its own Business Agent available globally on WhatsApp and Messenger in the second quarter of 2026,[^24] and businesses can connect third-party [AI agents](/en/learn/glossary#ai-agent) for their own customer service.[^15] Meta reported in July 2026 that marketing messages are the largest driver of its paid messaging growth.[^24] For a programme that measures more than volume, see [measuring a conversational programme](/en/learn/measuring-a-conversational-programme). ## What it costs The Business app is free.[^5] On the Business Platform, Meta charges per delivered message, and a provider usually adds its own fee per message, per seat or per month. Meta's rules as of October 2026:[^2][^3] ```diagram:compare | When it is sent | Charged by Meta? Marketing template | Whenever you send it | Yes, by recipient country Utility template | Outside the window, or as a reply inside it | Yes; replies inside the window became chargeable on 1 October 2026 Authentication template | Whenever you send it | Yes; some markets use separate international rates Service message | A free-form reply inside the 24-hour window | Yes from 1 October 2026, after 1,000 free per number each month Anything in the free entry point window | 72 hours after a click-to-WhatsApp ad or Page button | No delivery charge > Rules as of October 2026, from Meta's WhatsApp pricing pages. Rates by country are on Meta's rate card. ``` The rules in words: - **Rates depend on category and on the recipient's country code**, and Meta publishes them per currency. Volume tiers lower the rate for utility and authentication messages only.[^2] - **Service messages are charged again from 1 October 2026.** Each business phone number gets 1,000 free service messages a month; unused ones do not roll over. By market, the service rate matches the utility and authentication rate.[^2][^3] - **Utility templates sent as replies inside an open window**, free since 1 July 2025, are also charged from 1 October 2026.[^3] - **The free entry point window**: messages in the 72 hours after a customer arrives from a click-to-WhatsApp ad or a Facebook call-to-action button carry no delivery charge.[^3] - **Meta's own AI agent** is billed per token from 1 August 2026: US$2.00 per million input and output tokens. Meta estimates a typical message at 20,000 to 25,000 tokens, about 4 to 5 US cents, against its own estimate of 9 to 10 cents for a service message answered by a third-party AI agent.[^3] These are Meta's estimates, not quotes. - **Calls**: calls a customer places are free; calls a business places are billed by duration and destination, with volume tiers.[^13] Check [Meta's pricing page](https://developers.facebook.com/documentation/business-messaging/whatsapp/pricing) and the rate card linked from it before you budget: prices change, and the October 2026 changes made many older guides wrong. ## Rules and regulation This section describes rules; it is not legal advice. **Platform policy.** WhatsApp's Business Messaging Policy requires a business to have a person's permission ([opt-in](/en/learn/glossary#opt-in)) before messaging them and to respect requests to stop ([opt-out](/en/learn/glossary#opt-out)).[^4] Template categories are reviewed against content, and mislabelled templates can be re-categorised.[^9] Automating a personal or standard WhatsApp account through unofficial tools breaks the terms; see [the cost of an unofficial transport](/en/learn/the-cost-of-an-unofficial-transport). **AI on the Platform.** In October 2025 WhatsApp changed its terms to bar general-purpose AI chatbots, assistants whose main product is the AI itself, from the Business Platform from 15 January 2026. Businesses that use AI to serve their own customers were not affected.[^15] Regulators responded: - The European Commission opened an antitrust investigation in December 2025.[^16] - In March 2026 Meta said it would allow such chatbots in Europe for 12 months for a fee of €0.0490 to €0.1323 per non-template message, depending on the country.[^17] - In June 2026 the Commission imposed interim measures ordering Meta to restore free access for rival AI assistants until its investigation ends. The order covers the European Economic Area except Italy, whose competition authority had already acted.[^18] - Brazil was excluded from the ban after its competition authority intervened.[^19] If you deploy AI in conversations, also read [disclosing AI in a conversation](/en/learn/disclosing-ai-in-a-conversation) and [Article 50 of the EU AI Act](/en/learn/ai-act-article-50-for-messaging). **The EU Digital Markets Act.** The Commission designated WhatsApp a gatekeeper service in September 2023.[^20] The Act requires such services to let rival messaging apps interoperate on request and free of charge, preserving end-to-end encryption: first one-to-one messages, then group chats, and voice and video calls within four years of designation.[^22] WhatsApp enabled its first third-party chats in Europe in November 2025, with two small apps; people opt in.[^21] This concerns person-to-person chats, not business messaging. **Data protection.** Messages carry personal data, so laws such as the [GDPR](/en/learn/glossary#gdpr) apply to what you collect, store and pass to providers. Ask each provider where conversation data is kept ([data residency](/en/learn/glossary#data-residency)) and for how long. Consent should be recorded as data, per purpose and channel; see [consent is a data model](/en/learn/consent-is-a-data-model). ## Limits and pitfalls - **Testing inside the window, failing outside it.** Development messages work because the tester just wrote in; production sends fail because nobody did. Plan templates first. - **Treating WhatsApp as a free broadcast list.** Blocks and reports lower quality and, with it, the messaging limit.[^11] Marketing templates can be refused by Meta's per-person caps,[^10] and are not delivered to US numbers at all. - **Assuming replies are free.** They were for most of 2025. From 1 October 2026 they are not, beyond the free allowance.[^3] - **Misfiling templates.** A marketing message filed as utility gets moved.[^9] - **Reach is uneven.** In a market where few customers use WhatsApp, it is a second channel, not the main one; see [channels are not interchangeable](/en/learn/channels-are-not-interchangeable). - **Calling is not universal.** Business-initiated calls are off by default and unavailable in a list of countries.[^12] - **Mixing the app and the Platform.** A number set up for one team on the Business app works differently from one connected to an API. Decide which you need before you announce the number. - **Your record lives with you.** Meta delivers messages; consent and history are yours to keep across channels; see [omnichannel is an identity problem](/en/learn/omnichannel-is-an-identity-problem). ## Strengths and weaknesses ```diagram:compare | Strengths | Weaknesses Reach | More than 3 billion monthly users worldwide | Uneven by country; a minority channel in some markets Conversation | Two-way, with media, buttons, lists and calls | Business-initiated messages need approved templates Trust | A business profile in an app people already use | Per-person marketing caps; quality ratings can lower limits Cost | The Business app is free; free entry point window after ads | Per-message charges, now including most replies Control | One official API, hosted by Meta, with many providers | Rules and prices set by one company and changed often > Summarised from this article, as of October 2026. ``` ## What comes next - **Usernames.** People have been able to reserve WhatsApp usernames since 29 June 2026, with a wider rollout later in the year. A username lets someone be contacted without sharing a phone number,[^23] which matters for any system that uses the phone number as the customer's key. - **Charging for Meta's AI agent.** Meta said in July 2026 that it plans to charge businesses for its Business Agent in the second half of 2026, through a mix of subscriptions and token pricing.[^24] Token pricing started on 1 August 2026.[^3] - **The EU AI-access case.** The Commission's interim measures apply until its antitrust investigation ends.[^18] - **Interoperability.** Under the Digital Markets Act, voice and video calls between WhatsApp and rival apps are due within four years of the 2023 designation.[^22][^20] ## When to choose it ```diagram:decision # Is WhatsApp right for this message? Do most of your customers in this market use WhatsApp? | | Use the channel they do use, and offer WhatsApp as an option Is it a reply to something the customer started, or an update they expect? | Use WhatsApp: a reply in the window, or a utility template | Do you hold their opt-in for this kind of message? | Send a template that fits its honest category | Collect consent first, or use a channel you already have consent for > Recipients in the United States do not currently receive marketing templates on WhatsApp. ``` Choose the **Business app** if one small team answers chats by hand and nothing needs to be automated. Choose the **Business Platform** when messages come from your systems, several people share one number, or you need records, bots or AI agents. Either way, WhatsApp works best where customers already use it and where the business replies quickly. Compare it with Meta's other channels in [Messenger 101](/en/learn/messenger-101) and [Instagram 101](/en/learn/instagram-101), and, where few customers use WhatsApp, with [SMS 101](/en/learn/sms-101) and [RCS 101](/en/learn/rcs-101). See the [WhatsApp channel page](/en/ecosystem/channels/whatsapp), read [choosing a channel per message](/en/learn/choosing-a-channel-per-message), and weigh every channel side by side in [which channel for which need](/en/learn/which-channel-for-what). ## Sources [^1]: [Meta Platforms, Inc. (META) First Quarter 2025 Results Conference Call](https://s21.q4cdn.com/399680738/files/doc_financials/2025/q1/Transcripts/META-Q1-2025-Earnings-Call-Transcript-1.pdf) — Meta Investor Relations, 2025-04-30 [^2]: [Pricing on the WhatsApp Business Platform](https://developers.facebook.com/documentation/business-messaging/whatsapp/pricing) — Meta for Developers, accessed 2026-10 [^3]: [Upcoming pricing updates for Meta Business Agent, service and utility messages](https://developers.facebook.com/documentation/business-messaging/whatsapp/pricing/non-template-messages) — Meta for Developers, 2026-09-30 [^4]: [WhatsApp Business Messaging Policy](https://business.whatsapp.com/policy) — WhatsApp, accessed 2026-10 [^5]: [Introducing the WhatsApp Business App](https://blog.whatsapp.com/introducing-the-whats-app-business-app) — WhatsApp Blog, 2018-01-18 [^6]: [WhatsApp finally earns money by charging businesses for slow replies](https://techcrunch.com/2018/08/01/whatsapp-business-api/) — TechCrunch, 2018-08-01 [^7]: [Facebook to Acquire WhatsApp](https://about.fb.com/news/2014/02/facebook-to-acquire-whatsapp/) — Meta Newsroom, 2014-02-19 [^8]: [Announcing New Products to Make Business Messaging Easier](https://about.fb.com/news/2022/05/announcing-new-products-to-make-business-messaging-easier/) — Meta Newsroom, 2022-05-19 [^9]: [Template categorization](https://developers.facebook.com/documentation/business-messaging/whatsapp/templates/template-categorization) — Meta for Developers, accessed 2026-10 [^10]: [Per-user marketing template message limits](https://developers.facebook.com/documentation/business-messaging/whatsapp/templates/marketing-templates/per-user-limits/) — Meta for Developers, accessed 2026-10 [^11]: [Messaging limits](https://developers.facebook.com/documentation/business-messaging/whatsapp/messaging-limits) — Meta for Developers, accessed 2026-10 [^12]: [Cloud API Calling](https://developers.facebook.com/documentation/business-messaging/whatsapp/calling) — Meta for Developers, accessed 2026-10 [^13]: [Calling API pricing](https://developers.facebook.com/documentation/business-messaging/whatsapp/calling/pricing) — Meta for Developers, accessed 2026-10 [^14]: [Meta adds business voice calling to WhatsApp, explores AI-powered product recommendations](https://techcrunch.com/2025/07/01/meta-adds-business-voice-calling-to-whatsapp-explores-ai-powered-product-reccomendations/) — TechCrunch, 2025-07-01 [^15]: [WhatsApp changes its terms to bar general-purpose chatbots from its platform](https://techcrunch.com/2025/10/18/whatssapp-changes-its-terms-to-bar-general-purpose-chatbots-from-its-platform/) — TechCrunch, 2025-10-18 [^16]: [Commission opens antitrust investigation into Meta's new policy regarding AI providers' access to WhatsApp](https://digital-strategy.ec.europa.eu/en/news/commission-opens-antitrust-investigation-metas-new-policy-regarding-ai-providers-access-whatsapp) — European Commission, 2025-12-04 [^17]: [Meta will allow rival AI chatbots on WhatsApp in Europe, but for a fee](https://techcrunch.com/2026/03/05/meta-will-allow-rival-ai-chatbots-on-whatsapp-in-europe-but-for-a-fee/) — TechCrunch, 2026-03-05 [^18]: [Commission imposes interim measures on Meta to preserve free access to WhatsApp for rival AI assistants](https://ec.europa.eu/commission/presscorner/detail/en/ip_26_1276) — European Commission, 2026-06 [^19]: [After Italy, WhatsApp excludes Brazil from rival chatbot ban](https://techcrunch.com/2026/01/15/after-italy-whatsapp-excludes-brazil-from-rival-chatbot-ban/) — TechCrunch, 2026-01-15 [^20]: [Commission designates six gatekeepers under the Digital Markets Act](https://digital-markets-act.ec.europa.eu/commission-designates-six-gatekeepers-under-digital-markets-act-2023-09-06_en) — European Commission, 2023-09-06 [^21]: [Messaging Interoperability: WhatsApp enables third-party chats for users in Europe](https://about.fb.com/news/2025/11/messaging-interoperability-whatsapp-enables-third-party-chats-for-users-in-europe/) — Meta Newsroom, 2025-11 [^22]: [Regulation (EU) 2022/1925 on contestable and fair markets in the digital sector (Digital Markets Act)](https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX%3A32022R1925) — EUR-Lex, 2022-10-12 [^23]: [It's Time to Reserve Your WhatsApp Username](https://about.fb.com/news/2026/06/its-time-to-reserve-your-whatsapp-username/) — Meta Newsroom, 2026-06-29 [^24]: [Meta Platforms, Inc. (META) Second Quarter 2026 Results Conference Call](https://s21.q4cdn.com/399680738/files/doc_financials/2026/q2/META-Q2-2026-Earnings-Call-Transcript.pdf) — Meta Investor Relations, 2026-07-29 --- Published by the company behind five products in this category. Those products appear in this site's directory alongside competitors under the same published criteria and are labelled as its own. Editorial content does not recommend them.