Most Shopify merchants run email and SMS on gut feel: one subject line, one send time, one discount, and a "looks good" before hitting send. Email & SMS A/B Testing & Optimization turns that guesswork into a disciplined experimentation system built specifically for your store, your ESP/SMS provider, and your catalog.

This is not an instant App Store install. ECOSIRE builds, installs, and supports this app for you. We connect it to your Shopify store via OAuth with least-privilege scopes, read campaign and customer context through the Admin GraphQL API, and subscribe to orders/create, orders/paid, and checkouts/update webhooks so every test variant can be tied to actual orders — not just opens and clicks.

The engine supports A/B/n testing of subject lines and message content, send-time optimization per segment, and offer/discount testing (different codes or Shopify Discount objects per variant). A statistical-significance layer (two-proportion z-test for conversion, with sample-size and confidence guardrails) tells you when a result is real versus noise — so you stop calling random variance a "winner." Winning variants can auto-promote to the remaining audience once significance is reached.

Test configuration, holdback groups, and per-variant attribution are stored in Shopify metafields and an app-side datastore, with revenue-lift attribution computed from matched orders against a control. It orchestrates across both email and SMS so you can compare channels on equal footing.

We integrate with your existing stack — Klaviyo, Omnisend, Mailchimp, Postscript, or a transactional provider — rather than forcing a rip-and-replace. You get a working system, documented, with a support window. Honest delivery: typically 2–4 weeks depending on your provider mix and segmentation needs.