Mailro: Email Marketing vs Retentio
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Nov 6, 2026 for Mailro, May 21, 2026 for Retentio.
The short answer
- Only Mailro lists a free plan.
- Mailro lists 16 features Retentio’s listing doesn’t mention, including Back-in-stock emails, Browse abandonment, Cart emails.
Head to head
Free
- · 3,000 emails per month
- · Segment subscribers
- · Send campains and automated Flows
- · Up to 500 subscribers
Standard
- · 1,000 subscribers included
- · 10,000 emails/month at starting tier
- · Segment subscribers
- · Send campains and automated Flows
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureMailro is an email marketing platform built for Shopify stores that want real results — not just opens and clicks. Connect your store in minutes. Mailro automatically recovers abandoned carts, welcomes new subscribers, and follows up after purchases. Every email is tracked back to actual revenue. Abandoned cart emails include order verification — customers are never emailed after completing a purchase.
Retentio is a Customer Data Platform (CDP) that helps Shopify merchants understand customer behavior and drive retention. It automatically syncs your store data and provides a 360-degree customer view with purchase history, RFM analysis, and dynamic segmentation. Create targeted email and WhatsApp campaigns based on real customer data.
- Abandoned cart recovery with automatic order verification
- Revenue attribution — see exactly which emails drive sales
- Smart segments with flexible AND/OR filter logic
- Complete customer profiles with purchase history, RFM scores, and lifetime value
- Dynamic customer segments with visual filter builder (AND/OR logic)
- Email and WhatsApp campaigns with drag-and-drop editor and ready templates
- Abandoned checkout detection with web pixel and automated recovery campaigns
All the numbers
Every figure, side by side
A green dot marks the app ahead on a measured figure. Estimates, gaps and apps that leave no storefront trace never take the lead.
Adoption
| Measure |  Mailro |  Retentio |
|---|---|---|
| Detected stores | Not published | Not published |
| Net store change, 28 days | 0 | 0 |
| Stores added, 28 days | Not enough data | Not enough data |
| Big-brand share | Not enough data | Not enough data |
| Top store categories | Not published | Not published |
| Top store countries | Not published | Not published |
Reviews
| Measure | Mailro | Retentio |
|---|---|---|
| App Store rating | Not published | Not published |
| App Store reviews | Not published | Not published |
| New reviews, 28 days | Not enough data | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
FAQ
Mailro and Retentio: common questions
- Is Mailro or Retentio cheaper?
- Only Mailro lists a free plan. Shoplist compares base prices only between monthly plans in the same currency; usage charges and annual plans vary, so check each plan’s limits.
- What features does each app list that the other doesn’t?
- Mailro lists 16 the others don’t mention, such as Back-in-stock emails, Browse abandonment, Cart emails, Checkout emails. A feature missing from a listing may still be supported; this compares what each App Store listing says.
- Where does this comparison’s data come from?
- Shoplist crawls Shopify storefronts to detect which apps each store runs, and reads each app’s Shopify App Store listing for reviews, pricing, features and integrations. Store counts are as of Nov 6, 2026 for Mailro, May 21, 2026 for Retentio; estimated figures are labeled.
How Shoplist compares apps
Store counts come from Shoplist’s crawl of Shopify storefronts, which detects the apps each store runs; they are as of Nov 6, 2026 for Mailro, May 21, 2026 for Retentio. Reviews, ratings, plans, features and integrations come from each app’s Shopify App Store listing. 28-day figures are labeled when estimated, and a figure that is missing or estimated never decides who leads. Read the methodology.