Your platform shapes your score
Same audit, different results -- because Shopify, WordPress, and Wix have different ceilings. Stackra adjusts every benchmark, recommendation, and scoring threshold to what you can actually control on your platform.
No account needed · Results in ~3 minutes
How platform detection works
Four layers of platform intelligence applied to every scan.
Platform fingerprinting
We scan 217 technology patterns to identify the CMS, hosting environment, framework, and major integrations present on your site. Platform identity shapes every recommendation we make.
Owner control model
Every platform has things only the owner can change and things the platform controls. We separate these explicitly. Managed platforms (Wix, Squarespace) do not receive CWV recommendations for signals outside owner control.
Platform-adjusted scoring
Security headers, performance benchmarks, and CWV pass rates are interpreted against platform norms, not the web average. A 67% CWV pass rate means something different on Squarespace than on WordPress.
Platform-specific quirks
We track known platform behaviors that create false signals: Wix blocking PetalBot by default, Squarespace's lab vs field data divergence, Shopify OS 2.0 vs legacy theme performance gaps, and more.
Platforms
Mobile Core Web Vitals pass rates from HTTP Archive CrUX data. Click any platform for detection details, performance benchmarks, and what Stackra looks for.
WordPress
Below 48% web average
The most variable platform. Every result reflects owner decisions on hosting, caching, and plugins -- not the platform itself.
Top issues
- No page cache -- every uncached request runs full PHP and a database query
- Page builder overhead (Elementor on 43% of sites) is structural, not a misconfiguration
- Site-wide noindex left on after launch is the most common cause of zero search traffic
Shopify
Strongest baseline of any CMS
The strongest CWV baseline of any major CMS. OS 2.0 stores are significantly faster than legacy themes -- a gap our scanner detects.
Top issues
- Legacy OS 1.0 theme -- 15 to 30 Lighthouse points slower than a modern OS 2.0 theme
- App scripts loading on every page, including apps only needed at checkout
- Heavy product images -- Shopify handles format conversion, not source file weight
Wix
Largest YoY improvement of any platform
Platform-level optimizations push to all sites simultaneously. The biggest single-year CWV improvement of any major platform (55% to 71% YoY).
Top issues
- Heavy hero images uploaded at full resolution -- Wix converts format, not file weight
- App Market scripts load on every page with no way to conditionally load by page type
- Third-party embeds (Calendly, HubSpot chat) bypass Wix's optimization layer entirely
Squarespace
#1 for INP (95.9%), weak LCP
Best INP responsiveness of any platform but weak LCP. Lighthouse lab scores diverge significantly from real-user field data -- context we surface in every scan.
Top issues
- LCP is the weak point -- above-fold image size is the primary lever owners actually control
- Lighthouse scores look worse than reality: lab ~31 vs 68% real-user CWV pass rate
- No server header access -- third-party script management is the main performance lever
Webflow
in progress
Developer-targeted with clean semantic output. Low plugin overhead reduces third-party script variables compared to other platforms.
Top issues
- Lottie animations and interaction scripts add 200-400KB on design-heavy sites
- CMS-powered pages and static pages have different performance profiles
- Webflow hosting vs custom domain affects cache headers and security header control
See how your site scores
Stackra detects your platform automatically and tailors every recommendation to what you can actually change.
~3 minutes · No signup required.