Guides
What you need to know, with a date and its sources
Each guide explains one thing from start to finish. We review them when the facts change, and each one says when we last checked it.
Last reviewed
September 30, 2026WhatsApp
What WhatsApp costs from 1 October 2026
What Meta charges for each message, what stays free, what changes on 1 October and what a normal month comes to. With every country's rates and the official sources.
CurrentIn force from October 1, 2026
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September 30, 2026WhatsApp
WhatsApp Business with multiple users: what the app allows
The free app lets you run one number from your phone and up to 4 linked devices at once, but it does not share out the chats. What breaks as the team grows, what the options are and what each one costs.
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September 30, 2026WhatsApp
WhatsApp bulk messages: how to send without getting banned
A broadcast list is free, but it only reaches people who have saved your number. To reach everyone without risking the number there are two paid official routes, at €0.0585 a message in Spain.
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September 30, 2026WhatsApp
WhatsApp coexistence: Business app and API on one number
Coexistence keeps your number in the WhatsApp Business app on your phone and, at the same time, on a platform built on the official API. What you need, what syncs, what stops working on the phone and what Meta charges.
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September 30, 2026WhatsApp
AI agent for WhatsApp Business: Meta's 2026 rules and costs
An AI that serves your own business's customers is allowed on WhatsApp: since 15 January 2026 Meta only bans general-purpose assistants. It replies within 24 hours, and you pay for the message (1,000 free a month per number, then €0.0166 in Spain) plus the AI.
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September 30, 2026WhatsApp
WhatsApp message templates: when you need one, approval, examples
A template is the only message the WhatsApp API lets you send once 24 hours have passed since the customer's last message. Meta reviews it within 24 hours and charges by its category: in Spain, €0.0585 for marketing and €0.0166 for utility.
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September 30, 2026WhatsApp
WhatsApp Business limits: app and API, in one table
What the WhatsApp Business app allows (256 contacts per broadcast list, 4 devices, 50 quick replies) and what the official API allows (from 250 to unlimited people a day), with the official source for every figure.
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September 30, 2026WhatsApp
WhatsApp Business automatic replies: the free app vs the API
The free app has a greeting message, an away message with a schedule and up to 50 quick replies. Buttons, lists of options and a reminder to each customer need the official API.
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September 30, 2026WhatsApp
WhatsApp and GDPR for businesses: messaging your customers
Replying to someone who wrote to you, or reminding them of an appointment, needs no separate permission. A promotion does: express consent or an existing customer, and an easy opt-out in every message.
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