Charm is now natively integrated with Klaviyo — the email and SMS platform most serious Shopify brands already run on. Two-way sync, locale-aware flow templates, and a test-send harness ship at the same time.

Two-way sync

Every loyalty event fires as a metric Klaviyo can segment on — Points Earned, Reward Redeemed, Tier Upgraded, Referral Converted, Birthday Approaching, plus the per-event properties (rule name, point value, source order). And every customer's loyalty state — current balance, lifetime points, current tier, next-tier threshold — pushes onto the Klaviyo profile as updatable properties. Segments filter on loyalty state directly: "VIP Gold or above with > 500 points unspent" is one filter, no manual list rebuild.

Locale-aware flow templates

Four pre-built Klaviyo flow templates ship in EN / CS / DE / FR / ES / PL / NL / IT / PT / HU / SK — the same eleven locales as the Charm storefront widget, and they auto-route by the customer's language property:

• Welcome to loyalty — fires on first earning event
• Tier upgrade celebration — fires on tier threshold crossings
• Reward expiring — 14-day and 3-day nudges before points expire
• Birthday bonus — fires N days before birthday with a redeemable code

Import once; every brand-aware variable (sender name, brand color, footer logo) is pulled from your Klaviyo account, not duplicated in Charm. Edit the templates freely afterwards — Charm doesn't touch them after import.

Test sends and event replay

Every flow gets a test-send harness inside the Charm admin: pick a customer, replay any past loyalty event, and Klaviyo fires the flow against your inbox. No more "edit the flow, place a test order, wait 20 minutes" loops. Useful during initial setup and especially during the first Black Friday on a new program.

Under the hood

Compound indexes on the customer-events table shaved p95 read latency on the loyalty hub from ~140ms to ~22ms on the largest pilot store, which is what makes the two-way sync practical at scale.

Klaviyo integration docs →