Klaviyo and WhatsApp: CRM contacts ready for your conversations
From Klaviyo Flows you bring contacts into SendApp and tag them, via Webhook.
What you get by connecting Klaviyo
Contacts reach SendApp on every event, already with name, phone and email.
The automatic tag tells you where each contact comes from and lets you segment without exports.
You contact them when you decide: WhatsApp campaign, chat or API.
How to connect Klaviyo to SendApp
Steps taken from the official SendApp guide, read on 19 September 2026.
How it works
When a Klaviyo Flow sends an event, we create or update the contact in SendApp (name, phone, email from the payload) and tag it. We don't send messages on your behalf: you contact the leads whenever you want with a campaign or via API.
Step-by-step setup
- 1Copy your Webhook URL from the box above (select the account first).
- 2Log in to Klaviyo and create or edit a Flow with a trigger that has the profile (so the profile contains email and phone_number):List/Segment
- 3Metric
- 4Add an Action of type Webhook with POST method and paste the URL.
- 5Save.
General rule: choose events that include customer data (name, phone or email): without a phone or email the contact is not created.
What happens next
The contacts coming from Klaviyo are created and tagged (klaviyo) in SendApp. Reach them with a campaign filtering by that tag, or through the API.
Verify
Trigger a test event from the Flow on Klaviyo and check that the contact appears in SendApp. If the phone or email is missing, the contact is not created.
More integrations in the same family
Frequently asked questions
Connect Klaviyo to SendApp today
From Klaviyo Flows you bring contacts into SendApp and tag them, via Webhook.