Build a segment once. Push it everywhere you advertise.
Stop exporting CSVs and re-uploading them every Monday. Segments built in By the Numbers stay live and refresh regularly across Klaviyo, Mailchimp, Attentive, Meta, Google Ads, TikTok, and Reddit Ads.
60-second install · 14-day free trial · No credit card required


Why exported audiences go stale
A CSV-based workflow has three steps: identify a valuable audience, export it, and upload it to the ad platform. From that moment the audience starts to go stale. Customers who should have left it keep seeing ads, and customers who just qualified never enter it.
Segment sync replaces those steps: define the audience once in AI segmentation, connect the destination, and membership updates regularly from live store data. The audience in each platform follows the segment definition instead of a one-time export.
What operators sync first
Win-back flows that fire at the right moment
Sync the At risk and Defecting groups of the RFM matrix to a Klaviyo flow. When a customer cools off they enter automatically; when they buy again they leave at the next sync.
Lookalikes seeded from lifetime value
Feed Meta and TikTok a seed of top-LTV customers instead of all purchasers, so the algorithm clones your best buyers rather than your bargain hunters.
Exclusions that stop wasted spend
Push recent purchasers and discount-only shoppers to Google and Meta as exclusion lists, so prospecting budgets reach new customers.
Analytics that end in an audience
The RFM loyalty matrix shows you who is slipping. Sync turns that group into your next win-back audience, and the platform integrations keep every channel working from the same definition of your best customer.
Segment sync questions, answered
How do I sync Shopify segments to Klaviyo?
Build the segment in By the Numbers from 75+ filters across orders, products, lifetime value, and channels. Then connect Klaviyo and pick the segment, and it appears as a live list that refreshes regularly. Customers flow in and out as their behavior changes.
Which platforms does segment sync support?
Segment sync has native connectors for Klaviyo, Mailchimp, Attentive, Meta (Facebook and Instagram audiences), Google Ads, TikTok, and Reddit Ads. One segment can sync to several platforms at once, so your email list and your retargeting audiences are built from the same definition.
How is this better than exporting CSVs from Shopify?
A CSV goes stale the moment you export it. Synced segments refresh regularly, so an at-risk customer who comes back drops out of the win-back audience at the next sync, and a new VIP joins the lookalike seed the same way.
What kinds of segments can I build?
Anything the filters can express, such as buyers of a specific product who never repurchased, high-LTV customers from a given channel, or discount-only shoppers to exclude from prospecting. Each group in the RFM matrix (Best, Loyal, At risk, and so on) is also a ready-made segment you can sync to Klaviyo, Mailchimp, Attentive, Meta, Google Ads, TikTok, or Reddit Ads.
Your best audience already exists. Sync it.
Install free, let the backfill finish overnight, and push your first live segment to Klaviyo or Meta tomorrow.
60-second install · 14-day free trial · No credit card required