How do I sync my POS customers to my email list?

Gather connects your POS system (like Lightspeed, Retail Express, or Square) directly to Klaviyo. Once connected, all customer data from in-store purchases automatically syncs to your Klaviyo account. No manual exports or imports needed.

What's the best way to connect offline sales to Klaviyo?

The best approach is using a purpose-built integration tool like Gather that syncs POS data to Klaviyo in real-time. This ensures your email marketing campaigns have complete customer data-both online and offline purchases-enabling true omnichannel personalization.

Can I import historical POS data into Klaviyo?

Yes, Gather can sync up to 5 years of historical customer and sales data from your POS to Klaviyo. This gives you a complete view of customer lifetime value and purchase behavior for better segmentation and targeting.

Why is my Klaviyo data incomplete?

If your Klaviyo data is missing in-store purchases, it's likely because your POS isn't connected. Many retailers run separate systems for online (Shopify) and offline (POS), creating data silos. Gather unifies this data by syncing POS transactions to Klaviyo automatically.

How does syncing POS data improve email marketing?

When POS data syncs to Klaviyo, you can create segments based on total customer value (online + offline), send targeted campaigns to in-store buyers, run win-back campaigns for customers who haven't purchased recently, and personalize emails based on complete purchase history. This typically increases repeat purchase rates and average order value.

Which POS systems work with Klaviyo?

Gather currently supports Lightspeed Retail X with more platforms coming soon. While Lightspeed and Klaviyo now have a native integration, it's basic and limited. Gather offers way more features - real-time two-way sync, better filtering, more data points, and real human support. For a powerful Lightspeed Retail X integration, Gather is the better choice.

Unify Online & Offline Customer Data

Sync POS Data to KlaviyoOffline Sales Integration

Connect your point-of-sale system to Klaviyo automatically. Sync offline sales, in-store customer data, and purchase history to email marketing in real-time.

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The Problem: Siloed Customer Data

Online and Offline Data Live in Separate Worlds

Most retailers run separate systems: a POS for in-store sales and an eCommerce platform (like Shopify) for online. Customer data remains fragmented. Your email marketing only sees half the picture-missing in-store purchases means missed opportunities for personalization and retention.

Manual Exports Are Error-Prone and Time-Consuming

Some agencies try to bridge the gap by manually exporting POS data and importing it to Klaviyo. This is tedious, error-prone, and doesn't scale. You're constantly playing catch-up, and your email campaigns are always working with outdated information.

Gather Unifies Your Customer Data

Gather automatically syncs POS data to Klaviyo in real-time. Every in-store purchase updates your Klaviyo customer profiles instantly. You get a complete view of customer behavior-online and offline-enabling true omnichannel marketing.

Why Sync POS Data to Klaviyo?

Complete Customer Profiles

See the full picture: online purchases, in-store sales, total lifetime value, and purchase frequency. Create segments based on complete customer behavior, not just online activity.

Target In-Store Buyers

Send follow-up emails to customers who bought in-store. Offer online-exclusive deals, invite them to join your loyalty program, or simply say thank you. Turn one-time in-store buyers into repeat customers.

Prevent Win-Back Mistakes

Without POS data, you might send "we miss you" emails to customers who actually bought in-store last week. Syncing POS data prevents these embarrassing mistakes and keeps your messaging relevant.

Increase Repeat Purchase Rates

Retailers who sync in-store data to Klaviyo see higher average order values and more repeat purchases. When offline buyers get the same personalized flows as online shoppers, they convert more often.

How Agencies Use POS to Klaviyo Sync

Post-Purchase Email Sequences

Trigger automated email flows when customers make in-store purchases. Send thank you emails, product recommendations, and loyalty program invites-just like you do for online orders.

Unified Segmentation

Create segments like "High-value customers ($500+ total)" that include both online and offline purchases. Target VIP customers with exclusive offers regardless of where they shop.

Cross-Channel Campaigns

Run campaigns that bridge online and offline. For example: "Shop online and get 10% off your next in-store purchase" or "Visit our store and get free shipping on your next online order."

POS to Klaviyo Integration FAQs

Common questions about syncing point-of-sale data to Klaviyo

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