Postsell: Order Editing Upsell vs Selfix
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Nov 8, 2026 for Postsell, Oct 13, 2026 for Selfix.
The short answer
- Only Selfix lists a free plan. Paid plans start at $19/month for Postsell and $12/month for Selfix.
- Postsell lists 15 features Selfix’s listing doesn’t mention, including Analytics, Automated workflows, Bulk editing.
Head to head
- Australia
- France
- United States
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Unlimited
Free
- · Complete change history log
- · Customers edit their shipping address
- · Edit windows up to 30 minutes
Premium
- · Customers swap size or color variants
- · Edit window up to 4 hours
- · Email alert on every customer change
- · Everything in Free
- · Priority support
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureYour order confirmation email gets a 70% open rate. Why waste it? Postsell turns confirmation emails into revenue machines by embedding native upsell offers that customers actually want to click. No pushy pop-ups ruining your checkout. Just smart, one-click additions to existing orders that feel natural and boost AOV instantly. Plus, eliminate support headaches with full self-service order editing. Wrong address?
A wrong apartment number or the wrong size turns into a support ticket or a return. Selfix lets customers fix these themselves, minutes after buying. The edit option appears on the order confirmation page and in the customer account. Customers can correct their shipping address, and where enabled, swap a variant for another size or colour, leaving the order total unchanged.
- Allow customer-initiated address changes
- Customisable deadline for customer edits
- Deliver exceptional customer service
- Customers correct their own shipping address after checkout
- Set how long edits stay possible, from 15 minutes to 4 hours
- Edits lock automatically as soon as fulfillment begins
- Variant swaps never change the order total and require stock
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 | Postsell |  Selfix |
|---|---|---|
| Detected stores | 7 | 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 | Apparel & Accessories, Health & Beauty | Not published |
| Top store countries | Australia, France, United States | Not published |
Reviews
| Measure | Postsell | Selfix |
|---|---|---|
| App Store rating | 3.7 ★ | Not published |
| App Store reviews | 21 | Not published |
| New reviews, 28 days | 0 | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
FAQ
Postsell and Selfix: common questions
- Is Postsell or Selfix cheaper?
- Only Selfix lists a free plan. Paid plans start at $19/month for Postsell and $12/month for Selfix. 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?
- Postsell lists 15 the others don’t mention, such as Analytics, Automated workflows, Bulk editing, Cancellations. 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 8, 2026 for Postsell, Oct 13, 2026 for Selfix; 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 8, 2026 for Postsell, Oct 13, 2026 for Selfix. 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.