---
title: "The Wayflyer eCommerce Stack - September 2026 | Wayflyer"
description: "Everyone's a critic: a reviews tool, Reviews.io, is the fastest-growing app this month. See what eCommerce brands are adding and dropping in September."
canonical: "https://wayflyer.com/ie/data/articles/ecommerce-stack-september-2026"
locale: "en-IE"
date: "2026-10-06"
---

# Everyone’s a critic

The Wayflyer eCommerce Stack - September 2026

Data & Research · October 6, 2026 · Naoise Cunningham

After recently visiting New York City last month, my Uber rating sadly took a dive. Maybe some cultural differences got in the way, but while I always prided myself on my good rider score, NYC drivers were quick to critique me - I received my first ever 1- and 2-star rider ratings. Harsh, harsh.

I’ve yet to see what impact this will have on my future ride-hailing abilities. What is undoubtedly true, however, is that almost everything has a review these days, and everyone has an opinion. As such, it’s of no surprise that the fastest-growing app this month is a reviews tool.

Reviews.io saw its adoption grow 13% last month, and now sits #6 in overall adoption for “Reviews” tools, behind Judge.me, Trustpilot, Yotpo, Okendo, and Stamped.

### Fastest growing

The apps gaining the most net new installs, month on month.

| Rank | App | Category |
| --- | --- | --- |
| 1 | Reviews.io | Reviews & UGC |
| 2 | Shopify Promise | Returns & Shipping |
| 3 | Redo | Returns & Shipping |
| 4 | Triple Whale | Analytics |
| 5 | shop my | Affiliate |

### Trending

The apps with the strongest upward momentum relative to their size.

| Rank | App | Category |
| --- | --- | --- |
| 1 | dotdigital | Email & SMS |
| 2 | Reviews.io | Reviews & UGC |
| 3 | Salesforce | CRM |
| 4 | Shopify Promise | Returns & Shipping |
| 5 | shop my | Affiliate |

## Returns & Shipping is on the move

Two of the top three Fastest Growing apps are in Returns & Shipping: Shopify Promise and Redo. That helped the category grow 1.7% this month, one of the fastest rates of any category in the eCommerce Stack.

They’re growing among very different brands, though. Shopify Promise is twice as common among brands under $1M in GMV (6% of them run it) as amongst brands over $5M (3%). Redo goes the other way, with 13% of $5M+ brands having it installed, compared with under 4% of sub-$1M brands.

## dotdigital makes it onto the Trending board

dotdigital made the Trending leaderboard. Though small in our base, they are growing quickly. Despite being around for a while, their [recent rebrand](https://x.com/dotdigital/status/2072224702945255834?s=20) seems to have done the trick in driving new users.

## View the refreshed stack below

> The interactive treemap and its category-by-category adoption breakdown are omitted here. It is the same live chart as on [the eCommerce Stack page](https://wayflyer.com/ie/data/ecommerce-stack); see its Markdown twin at https://wayflyer.com/ie/data/ecommerce-stack.md for the full category tables.

## Disclaimer

Wayflyer Insights are based on aggregated, anonymized data from our base and are provided for general informational purposes only. They are not industry benchmarks, investment advice, or guarantees of outcomes, and may not be representative of the broader market.