WhatsApp reaches customers on the app they already check constantly. Climails connects to the official WhatsApp Cloud API — template messages for proactive outreach and session messages for replies.
What you'll need
- A WhatsApp Business account and a connected phone number
- Approved message templates for proactive sends
- Opt-in from each recipient
Template vs. session messages
- Template messages: pre-approved by WhatsApp; required to start a conversation or message outside the 24-hour window.
- Session messages: free-form replies allowed within 24 hours of the customer's last message.
Set it up
- 1
Connect WhatsApp Cloud API
Link your WhatsApp Business number in the channel settings.
- 2
Add approved templates
Register the templates you'll use for outreach, with their variables.
- 3
Send
Use a WhatsApp step in an automation/campaign, or POST /v1/messages with channel "whatsapp".
Conversations & consent
Only message people who opted in to WhatsApp. Inbound replies open a 24-hour session window during which you can send free-form messages.
Frequently asked questions
Why must I use templates?
WhatsApp requires pre-approved templates for business-initiated messages to prevent spam. Free-form text is only allowed inside an open session.
What's the 24-hour window?
After a customer messages you, you can reply freely for 24 hours. After that, you need a template again.
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