Connect the official Meta WhatsApp Business API to your company and start sending bulk WhatsApp messages to your customers with approved templates, campaigns from Excel, a 24-hour window managed automatically and published prices per category in euros — something almost nobody in Spain dares to do.
WhatsApp is the app where your customers already talk. The WhatsApp Business API is Meta's official way for your software to speak that language: automatic notices, campaigns and customer service, under your verified business name.
The free app works for a small shop: one main device, broadcasts of at most 256 contacts and everything done by hand. The WhatsApp API for business removes those limits: bulk sending with approved templates, integration with your CRM or ecommerce, multiple agents and delivery and read statistics per message.
| Feature | WhatsApp Business app | WhatsApp Business API |
|---|---|---|
| Cost | Free | Pay per message delivered |
| Bulk broadcast | Max. 256 contacts | No practical limit |
| Integration with your software | No | REST API and webhooks |
| Approved templates and variables | No | |
| Automation and campaigns | Manual | Scheduled from the dashboard or the API |
Sending bulk WhatsApp messages with unofficial tools (phones with SIM cards, WhatsApp Web automations) always ends the same way: a blocked number and lost customers. With Meta's WhatsApp Business API through SMSverifica you send with your verified number and your business name, respecting Meta's policies and the GDPR.
To start a conversation with a customer, Meta requires an approved template. It is not an obstacle: it is what keeps WhatsApp free of spam and makes sure your messages get read.
Create your template with variables — "Hi {{1}}, a reminder of your appointment on {{2}} at {{3}}" — and choose its category (marketing, utility or authentication). Meta reviews it, usually within minutes and at most within 24-48 hours.
From the dashboard or through the API you set template_name and template_vars and each customer receives their personalised message. Bulk WhatsApp campaigns fill in the variables from the columns of your Excel file.
WhatsApp confirms delivered and read per message: you see it in the campaign statistics in real time and receive it in your system through signed webhooks. Adjust templates and timing with data, not intuition.
When a customer writes to your WhatsApp Business number, Meta opens a 24-hour service window. Within that window you can reply with free text (no template) at the cheapest rate: the service category, €0.005 per message. Each new message from the customer restarts the clock.
Outside the window, to start the conversation yourself you need an approved template in the marketing, utility or authentication category. SMSverifica checks the window automatically: if you try to send free text outside it, the API responds with the clear error wa_outside_window instead of charging you for a message that Meta would reject.
A strategy that saves money: send the first notice with a utility template and handle the rest of the conversation within the window at the service price. Your average cost per conversation drops without touching a line of code.
Hi Marta, your order 8412 leaves our warehouse today. We will let you know when it is out for delivery.
Delivered and read 9:02Can I change the delivery address?
Of course! Tell me the new address and we will change it right away.
Delivered and read 9:05Meta charges by conversation category. While other providers hide the WhatsApp price behind a “contact sales”, we publish it: this is what we charge you for each message, VAT extra, with a balance in euros.
| Category | What it is for | Our price per message | Example |
|---|---|---|---|
| Service | Replies within the 24 h window | 0,005 € | Conversational customer service |
| Utility | Transactional notices: orders, appointments, payments | 0,005 € | "Your order 8412 arrives tomorrow" |
| Authentication | OTP codes and user verification | 0,005 € | "Your access code is 481922" |
| Marketing | Promotions, news, abandoned-cart recovery | 0,005 € | "Sale: 20% off this week in your shop" |
What this price includes and what it does not. It is our price per message sent: platform, campaigns, templates, statuses, webhooks and support. Meta bills you its conversation fees separately, on your own WhatsApp Business account, because the channel works with your line and your credentials. We do not resell those fees or add a margin to them, so you cannot pay them twice — but do count them when you do your sums. Meta publishes its prices by country and category in its official developer documentation.
Transparency versus “ask for a price”: most Spanish platforms do not publish what the WhatsApp Business API costs. Here you have the price by category, the full price table and a calculator. The price is the same whether you send 100 or 100,000 messages: there are no volume tiers. If your volume justifies a tailored rate, ask for it and it is applied to your account message by message.
A good part of the cost of WhatsApp Business in Spain is not in the messages: it is in the monthly plan that some providers charge for having the line connected.
| Item | SMSverifica | Another Spanish provider |
|---|---|---|
| WhatsApp line fee | €0/month | €99.00/month |
| Sign-up / set-up (one-off payment) | 0 € | €49.00 non-refundable |
| 500 utility messages | 2,50 € | According to their rate |
| Meta's conversation fees | Separate, billed to you by Meta | Separate |
| First year, fees and set-up only | 0 € | 1.237 € |
Figures taken from the activation screen of the «WhatsApp Business Accounts» plan in a Spanish provider's dashboard, checked on 2 August 2026: €99.00/month per WhatsApp line, €49.00 set-up cost (one-off payment), non-refundable registration and start-up costs. We do not compare their price per message because they do not publish it.
Because the line is yours. You connect your WhatsApp Business account (Meta Cloud API) with your own credentials and we provide the platform: campaigns, templates, the 24 h window, statuses, webhooks and API. If you do not send in a given month, you pay nothing that month.
Prefer a channel with no Meta verification and no approved templates? Bulk SMS only depend on your account being approved here, and Telegram costs €0.010 per message, on condition that the recipient has started the conversation with your bot first: Telegram does not allow writing to a number, so it works for notifying people who already follow you, not for a new list.
The same endpoint you use for SMS sends WhatsApp templates: change channel and add the template. With idempotency, signed status webhooks (delivered, read) and a sandbox mode at no cost.
curl -X POST https://app.smsverifica.com/api/v1/messages \
-H "X-Api-Key: sk_live_..." \
-H "Idempotency-Key: cita-2931-recordatorio" \
-H "Content-Type: application/json" \
-d '{
"channel": "whatsapp",
"to": "+34600111222",
"template_name": "recordatorio_cita",
"template_vars": {"1": "Marta", "2": "12/07", "3": "10:30"},
"category": "utility"
}'
# Response with the status and the cost in euros
{ "data": { "id": 5312, "status": "queued",
"channel": "whatsapp", "cost_eur": "0.0050" } }Idempotency-Key header: no duplicates even if you retry.POST /campaigns; none of the platforms we compared in July 2026 had one.Meta requires — and so does the GDPR — that the customer has given their consent (opt-in) to receive WhatsApp messages from your company: a checkbox at checkout, a sign-up form, a keyword by SMS or a conversation started by them. Without opt-in, user complaints lower your number's quality rating until template sending is blocked.
SMSverifica stores the opt-in status per contact so you have it in front of you when you prepare each list. Automatic filtering at send time does not exist yet: today it is you who leaves contacts without consent out of the list before launching the campaign. Also, as every account is approved manually, no spammer shares the platform with you or puts the reputation of the service at risk.
{BAJA}: whoever opts out goes onto your opt-out list and campaigns always leave them out. An opt-out sent as a WhatsApp reply is not interpreted: you add it to that list yourself.It is Meta's official interface for connecting WhatsApp to your company's software (CRM, ERP, ecommerce): it lets you send approved templates, bulk campaigns and automatic notices, with several agents and without depending on a mobile phone. It is the legal, scalable way to send bulk WhatsApp messages to customers.
The WhatsApp Business app is free but limited: one main device, broadcasts of at most 256 contacts and no integration with your software. The API is paid per message, with no practical limit on recipients, approved templates, automation and statistics: it is the option for companies that send notices or campaigns in volume.
Our price per message, according to Meta's conversation category: service €0.005, utility €0.005, authentication €0.005 and marketing €0.005. No monthly fee for the line, no set-up cost and no lock-in. Meta bills its conversation fees separately, on your own WhatsApp Business account: our price does not include them or add a margin to them.
When a customer writes to you, a 24-hour service window opens during which you can reply with free text at the service category price. Outside that window, you can only start a conversation with a template approved by Meta. SMSverifica manages the window automatically and warns you with the error wa_outside_window if you try free text outside it.
Yes. Meta and the GDPR require the recipient to have agreed to receive messages from your company by WhatsApp: a checkbox on your website, a form, a previous SMS or a conversation started by the customer. SMSverifica records the opt-in per contact so you can prove it in audits and avoid your number being blocked.
They are messages with formatting and variables ({{1}}, {{2}}) that Meta reviews and approves before they can be sent outside the 24-hour window. Approval usually takes from minutes to 24-48 hours. With SMSverifica you send them by setting template_name and template_vars from the dashboard or the API.
Free sign-up reviewed by hand, prices by category published excl. VAT, a balance that never expires and support in Spanish that knows about templates, windows and opt-in.