Integrations / Marketing, SMS and reviews

Use AssistCall with Klaviyo

AssistCall answers your business calls 24/7 and can send each call, message and booking to Klaviyo through Webhook, Live API actions, Zapier, Make, n8n.

Klaviyo: Email, SMS and customer-data platform used mostly by online stores to send automated flows and campaigns based on shopper data.

Connects

Example call

A shopper calls about a late order. AssistCall takes the message, and its webhook triggers a Zap that adds a 'Phone call' event to the shopper's Klaviyo profile, where your team sees the call summary in the activity feed.

• When a call ends, a Zap started by AssistCall's call.completed webhook runs Klaviyo's Create Event to log a 'Phone call' event with the summary on the caller's profile. A Klaviyo flow can be set to start from that event.
• During a live call, the receptionist looks up the caller's Klaviyo profile by phone number with your private API key, to tell whether they are an existing customer.
• Send lead.captured events to Make's Klaviyo app to create or update the profile with the caller's name, phone and email.

How it connects

• Webhook: Signed JSON for every call, message and booking, sent to any HTTPS URL you choose.
• Live API actions: During the call, the receptionist calls the app's API with your key to look up or create records.
• Zapier: Send AssistCall events to a Zap (Webhooks by Zapier, Catch Hook), then use the app's Zapier actions. Needs a paid Zapier plan.
• Make: Start a Make scenario with a custom webhook and use the app's Make modules.
• n8n: Start an n8n workflow with a webhook node, then call the app with its node or an HTTP request.
• Call forwarding: Forward your business line to AssistCall when busy, after hours or always. Works with any carrier.

About Klaviyo's API

• Self-serve API: you can create a key in your account
• Style: REST (JSON:API)
• Authentication: Private API key (Authorization: Klaviyo-API-Key header) or OAuth 2.0
• On Zapier: yes. On Make: yes.

Owners, Admins and Managers create private keys under Settings > API keys, scoped Custom, Read-only or Full Access (for example profiles:read, events:write). Every request needs a revision header. The Webhooks API is limited to Advanced KDP customers and Klaviyo app partners. Klaviyo flows can also call a webhook. n8n has no dedicated Klaviyo node, so you use the HTTP Request node.

Not included: no one-click Klaviyo app, no listing in Klaviyo's marketplace, no two-way sync, and no partnership with Klaviyo, Inc..

Researched by the AssistCall team and checked against Klaviyo, Inc.'s public pages on October 24, 2026. Klaviyo is a trademark of Klaviyo, Inc.. AssistCall is an independent product of Starling Global LLC and is not affiliated with, endorsed by, sponsored by or approved by Klaviyo, Inc..

More Marketing, SMS and reviews integrations

• Constant Contact: Email and SMS marketing platform built for small businesses and nonprofits, with lists, campaigns, events and automations.
• Google Business Profile: Google's free business listing that shows your hours, phone number, reviews and booking options on Google Search and Maps.
• Mailchimp: Email and SMS marketing platform for small businesses, with audiences, campaigns, automations and signup forms.
• Yelp: Local business directory and review site where customers find businesses, read reviews, call, and send Request-a-Quote leads.
• ActiveCampaign: Email marketing, marketing automation and sales CRM for small and mid-sized businesses.
• Birdeye: Reputation and customer-experience platform for local and multi-location businesses, covering review requests, listings, messaging, surveys and appointments.

All product and company names in this directory are trademarks or registered trademarks of their respective owners, used only to identify systems AssistCall can send call information to or receive information from. Their use does not imply any affiliation with or endorsement by their owners. AssistCall connects using signed webhooks, the business's own API keys, automation platforms (Zapier, Make, n8n) the business sets up in its own account, and call forwarding. AssistCall does not provide one-click connectors, marketplace apps, certifications or two-way record or calendar sync, and does not sign HIPAA business associate agreements. Vendor features, plans and API access can change; information last checked October 24, 2026.