Does Essential Preorder integrate with Klaviyo or Omnisend? (Essent Preorder Back in Stock app)

  • Omnisend: yes. Connect it under Back in stock → General settings → Integrations with your Omnisend API key (any plan, including Free). New Back in Stock signups sync to Omnisend as contacts with events you can use in flows. Only signups made after you connect are synced, not your existing list. Choosing Omnisend as the sender on a campaign needs Lite or higher. Preorder events aren't sent to Omnisend.
  • Klaviyo, Mailchimp, Postscript: coming soon. Click Notify me next to them on the Integrations page to hear when they launch.
  • Until then: use Shopify Flow (the Back in stock signup created trigger) to pass signups to your email tool, or export the list and import it.

Full guides: Omnisend integration and Shopify Flow triggers and actions.

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