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This is where you’ll find the latest releases, features, and improvements to the Sinch integration for Klaviyo.
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Version 2.1 - 15 Aug 2025
Advanced contact sync duplicate handling
This update enhances how duplicate contacts are synced and managed across supported integrations (e.g. Klaviyo and Shopify) to help you run more effective campaigns and abandoned cart automations without data conflicts. These changes improve data consistency, reduce manual cleanup, and ensure better performance for multichannel messaging.
Key features:
- Contacts with the same phone number will be merged during sync and tagged with a custom Source label in the Sinch Engage platform under contact properties e.g. "Shopify, "Klaviyo".
- A single contact can belong to multiple source groups to enable better segmentation e.g. Contact A can be part of both "Shopify A" and "KlaviyoA" groups.
Custom field mapping
You can now map more fields to include custom fields when syncing your contacts. You can accurately map Sinch Engage fields to your Klaviyo contact fields to ensure your data syncs correctly.