Fulfilleo vs MailSeen ‑ Email Tracking Pro
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Oct 19, 2026 for Fulfilleo, Oct 13, 2026 for MailSeen.
The short answer
- Paid plans start at $9/month for Fulfilleo and $9.99/month for MailSeen.
Head to head
Fulfillment automation
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Starter
Standard
Pro
0-100 orders/mo.
- · - 24/7 Support
- · - Multi-market enabled
- · - Tracking applied only for orders after the installation of the app
- · - Up to 100 orders fully tracked
101-500 orders/mo.
- · - 24/7 Support
- · - Multi-market enabled
- · - Tracking up to 500 orders/mo. fully tracked
500+ orders/mo.
- · - 24/7 Support
- · - Multi-market enabled
- · - Unlimited full tracking
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureFulfilleo makes it possible to automatically: - pull shipped orders from your supplier / warehouse / 3PL - fulfill orders in Shopify - send email notifications with package tracking numbers to customers Schedule automations to run at a selected time, every day, or every hour. Fulfilleo can receive input data by email, request from a REST API or read from an FTP server.
MailSeen will tell you if emails such as order confirmation, fulfilment confirmation etc. have been opened by your customers. In this way, if people reach out or you need to contact them, you know what information they already have.
- Pull order tracking numbers from CSV, Excel, JSON, or XML files.
- Mark orders as fulfilled
- Send shipping confirmation email with tracking numbers included
- Tracking for order confirmation automated email
- Tracking for fulfilment confirmation automated email
- Tracking for out for delivery confirmation automated email
- Tracking for delivered confirmation automated email
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 |  Fulfilleo |  MailSeen |
|---|---|---|
| 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 | Fulfilleo | MailSeen |
|---|---|---|
| App Store rating | 5.0 ★ | Not published |
| App Store reviews | 7 | Not published |
| New reviews, 28 days | 0 | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
FAQ
Fulfilleo and MailSeen: common questions
- Is Fulfilleo or MailSeen cheaper?
- Paid plans start at $9/month for Fulfilleo and $9.99/month for MailSeen. Shoplist compares base prices only between monthly plans in the same currency; usage charges and annual plans vary, so check each plan’s limits.
- 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 Oct 19, 2026 for Fulfilleo, Oct 13, 2026 for MailSeen; 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 Oct 19, 2026 for Fulfilleo, Oct 13, 2026 for MailSeen. 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.