Corso vs Gladly Customer Service: Shopify Performance Comparison
Gladly Customer Service wins with Grade B vs Grade C — a one-grade performance difference that compounds on mobile devices.
Both apps provide helpdesk and customer support functionality for Shopify stores. This page presents StackConflict’s independent lab results for both — measured in a clean-room environment with no other apps installed.
Head-to-Head Metrics
| Metric | Corso | Gladly Customer Service | Faster |
|---|---|---|---|
| Overall Grade | C | B | Gladly Customer Service |
| JS Payload | 302.26 KB | 132.38 KB | Gladly Customer Service |
| CPU Desktop | 219 ms | 20 ms | Gladly Customer Service |
| CPU Mobile | 662 ms | 67 ms | Gladly Customer Service |
| Layout Shift | 0.0 | 0.0 | Corso |
Mobile CPU measured with 4× CDP throttle (mid-range Android). Tested 2026-05-30.
Gladly Customer Service — The Faster Option (Grade B)
Gladly Customer Service scores Grade B with a JS payload of 132.38 KB and 20 ms desktop CPU execution. Mobile CPU: 67 ms. It passes every StackConflict threshold for payload, CPU, and layout stability — making it safe to install on any storefront including mobile-first stores where Time-to-Interactive directly impacts conversion.
View full Gladly Customer Service speed report →
Corso — The Heavier Option (Grade C)
Corso scores Grade C with a JS payload of 302.26 KB and 219 ms desktop CPU execution. Mobile CPU: 662 ms. This places it in the heavier half of StackConflict’s benchmark dataset — merchants running mobile-first stores should evaluate whether the feature value justifies the performance tradeoff.
View full Corso speed report →
When to Choose Corso
- Its unique feature set has no lighter equivalent in StackConflict’s database
- Your store traffic is predominantly desktop
- You have already removed or lightened other heavy scripts to compensate
When to Choose Gladly Customer Service
- You need its specific features and can monitor its mobile impact
- Your other apps are lightweight (Grade A) so there is headroom
- You are on desktop-skewed traffic where CPU cost matters less
Performance Verdict
Winner: Gladly Customer Service — Gladly Customer Service wins with Grade B vs Grade C — a one-grade performance difference that compounds on mobile devices.
Install Gladly Customer Service →
About This Test
StackConflict measures each Shopify app in an isolated clean-room environment — a single development store, no other scripts, Playwright-controlled browser. V8 CPU cost is the ScriptDuration delta before and after injection. CLS is captured from the same browser session. Results represent the median of three independent runs with outliers removed.
Data from the StackConflict Lab. Last updated 2026-05-30.