Key takeaways in 30 seconds
- WhatsApp Business is free for small businesses — WhatsApp Business API is paid but unlocks advanced automation
- WhatsApp message open rate: 98% — versus 20 to 30% for email
- Set up an away message and a greeting message so a customer is never left without a reply
- Centralize WhatsApp with your other channels so you are not juggling apps
Why WhatsApp became unavoidable
WhatsApp has hundreds of millions of active users in Europe. For your customers, it is the messaging app they already use — with family, friends, colleagues. Contacting a business through WhatsApp feels natural, fast, informal.
For you as a business, the upside is real: a 98% open rate, a near-instant reply expected, and a sense of closeness that email does not give.
The question is no longer "should I be on WhatsApp" — it is "how do I handle WhatsApp properly".
WhatsApp Business vs WhatsApp Business API: the key difference
WhatsApp Business (free mobile app)
For freelancers and very small businesses. Free to download. It offers:
- A business profile with your info (address, website, hours, description)
- An automatic greeting message for new contacts
- A configurable away message with hours
- Quick replies (templates for frequent answers)
- A product/service catalog
- Labels to organize your conversations (New customer, Pending, Order delivered, etc.)
Main limit: one phone at a time, no multi-user access, no API.
WhatsApp Business Platform (API)
For businesses that want to automate and integrate WhatsApp into their tools. It enables:
- Multi-agent (several people on the same number)
- Proactive messages (order confirmations, appointment reminders)
- Integration with a CRM or a unified inbox
- Bots and advanced automation
Access through official partners like Meta, or through solutions like Aevia Inbox that integrate the WhatsApp API directly into a web interface.
Basic WhatsApp Business setup
If you use the free app, here are the 5 settings to do right away:
1. Complete your business profile
Settings > Business tools > Business profile. Add: business name, category, description (2-3 sentences on what you do), address, website, email, opening hours.
A complete profile builds trust. A contact who messages you sees your profile before receiving your reply.
2. Set up your greeting message
Settings > Business tools > Greeting message. This message is sent automatically to any new contact who writes to you for the first time.
An effective example: "Hi! Thanks for reaching out. We'll get back to you shortly. To save time, could you tell us what your request is about?"
3. Set up your away message
Settings > Business tools > Away message. Define the hours when you are unavailable.
Example: "Hi! We've received your message. Our team is available Monday to Friday, 9am to 6pm. We'll reply as soon as possible. For urgent matters: [number]."
4. Create quick replies
Settings > Business tools > Quick replies. Create shortcuts for your frequent answers. "/pricing" can open a full message with your rate card. "/booking" with your calendar link.
5. Use labels
Organize your conversations with colored labels: New, Quote sent, In progress, Urgent, To call back. This keeps you from losing the thread.
Scaling up: the unified inbox
If you handle WhatsApp manually on one phone, you will quickly hit limits:
- No way to delegate to a teammate without sharing your phone
- WhatsApp and Instagram and email in different apps = lost messages
- No centralized history per customer
The solution: a unified inbox like Aevia Inbox, which connects the WhatsApp Business API with all your other channels (Instagram, email, Messenger) in one web interface. Several agents can reply, conversations are archived per customer, and AI auto-replies handle frequent questions.
The legal framework to respect
WhatsApp Business is not exempt from GDPR rules:
- You cannot send unsolicited messages (spam)
- Customers must have consented to receive your communications
- Keep data in line with your privacy policy
Messages sent through the WhatsApp Business API have an extra constraint: you can only send proactive messages (outside a reply) using templates approved by Meta.