FullStory vs Shopify Web Pixels Manager: Shopify Performance Comparison
Both apps score Grade C — FullStory has the edge with 24 ms vs 42 ms desktop CPU execution.
Both apps provide heatmaps, session recording, and analytics 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 | FullStory | Shopify Web Pixels Manager | Faster |
|---|---|---|---|
| Overall Grade | C | C | Tie |
| JS Payload | 297.02 KB | 210.65 KB | Shopify Web Pixels Manager |
| CPU Desktop | 24 ms | 42 ms | FullStory |
| CPU Mobile | 84 ms | 182 ms | FullStory |
| Layout Shift | 0.0 | 0.0 | FullStory |
Mobile CPU measured with 4× CDP throttle (mid-range Android). Tested 2026-05-30.
FullStory — The Faster Option (Grade C)
FullStory scores Grade C with a JS payload of 297.02 KB and 24 ms desktop CPU execution. Mobile CPU: 84 ms. Even as the faster of the two options, merchants on mobile-heavy stores should weigh its impact on their combined app stack.
View full FullStory speed report →
Shopify Web Pixels Manager — The Heavier Option (Grade C)
Shopify Web Pixels Manager scores Grade C with a JS payload of 210.65 KB and 42 ms desktop CPU execution. Mobile CPU: 182 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 Shopify Web Pixels Manager speed report →
When to Choose FullStory
- 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 Shopify Web Pixels Manager
- 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
Performance Verdict
Result: Comparable — Both apps score Grade C — FullStory has the edge with 24 ms vs 42 ms desktop CPU execution.
Both apps carry Grade C — see StackConflict’s full Analytics rankings for lighter alternatives.
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.