Choose the right email and SMS tools for your Shopify store.

Plain English reviews, comparisons, and setup guidance for Shopify merchants. The goal is a tool that fits your store, audience, and budget.

MerchantInbox helps Shopify merchants answer a practical question: which email and SMS tool fits your store, and what should you avoid? We focus on Omnisend and Shopify Email/SMS first, with Klaviyo used as a comparison point so you can weigh trade-offs without the hype.

Content is written in plain English for solo founders and small ecommerce teams choosing or switching an email or SMS tool, especially for cart abandonment, flows, and campaigns.

Guides we’re publishing first

These are the first reviews and comparisons we are writing for Shopify store owners. Pages marked In progress already have a live URL. The full guides will appear here as they are ready. How We Review is live now.

Live Omnisend for Shopify — Review
Who Omnisend may fit on Shopify, what pricing can look like, and when you should wait. Plain review with dated public pricing — no affiliate links.
Live Shopify Email: When It's Enough
When Shopify’s built-in email is enough for your stage, and when it makes sense to add a fuller email tool.
Live Omnisend vs Klaviyo for Shopify Stores
A plain comparison of Omnisend and Klaviyo: who each fits, what each costs at three list sizes, and when Shopify's own email tool may be enough for now. No rankings.
Live Shopify Email (Now Shopify Messaging) vs Klaviyo
A plain comparison of Shopify Email, now called Shopify Messaging, and Klaviyo: who each fits, what each costs at three list sizes, and when to switch.
Live Klaviyo Alternatives for Shopify Stores
Thinking of leaving Klaviyo? A plain guide organised by your reason for leaving, with dated prices, what to watch for with each option, and when staying put makes sense. No rankings.
Live Klaviyo Pricing: What You Pay for Email, Add-ons and Texts
A plain guide to Klaviyo pricing: what the Email plan costs at five list sizes, what each add-on and text bundle adds, and how billing works.
Coming soon Shopify SMS Options — Omnisend and Alternatives
An overview of SMS options for Shopify stores, starting with Omnisend. Alternatives are listed without ranking by commission.
Live How to Set Up Abandoned Cart Emails on Shopify
Whether Shopify already sends abandoned cart emails for you, how to set them up, what to write, and what to check when they are not sending.
Live How We Review Shopify Email Tools
Methodology, disclosure posture, and how we approach Shopify email tool reviews.