WP Engine sells a "40% speed improvement after migrating" and a pre-launch Core Web Vitals review, and the site runs on its own Headless Platform. But Google's data for real visitors shows the homepage failing both loading (LCP 3.1s) and responsiveness (INP 318ms), and the phone lab test scores 32/100. The hosting is not the cause: the page loads 2.9 MB of JavaScript from 24 third-party hosts, with Google Tag Manager alone at 1.1 MB. Buyers who run PageSpeed on a host's own site before switching see that score.
First action
List every tag in Tag Manager with its owner and last use.
How to measure it
Homepage passes Core Web Vitals
- Now
- –
- Target
- LCP under 2.5s, INP under 200ms
- By
- 60 days
Steps
Baseline
Save PageSpeed and field data for the homepage and plans page.
Head of Web Experience 1 day
Tag audit
Owner and last use for every tag and pixel.
Marketing Operations Manager 1 week
Remove and delay
Drop unused tags; load the rest after interaction.
Marketing Operations Manager 1 week
Hero image
Sized, preloaded image instead of the heavy illustration.
Head of Web Experience 2 days
Caching
Long cache lifetimes for static files.
Head of Web Experience 1 day
Guardrail
A performance budget check before any new tag goes live.
Marketing Operations Manager 1 week
Publish
Before and after as a Headless Platform case study.
Product Marketing Manager 1 month
Why it works
Treat the homepage and plans page as product demos. Move analytics, chat, heatmap, testing and ad pixels behind consent and after first interaction, cut tags that no team uses, serve the hero illustration as a sized image, and set long cache lifetimes on static assets. Publish the before-and-after field numbers as a case study of the Headless Platform.
Speed is the promise, and a fast homepage backs it up in the place prospects check first. Fewer scripts also lift conversion on the plans page, and the published fix becomes sales material.
Ready to use
ChecklistHomepage speed checklist
[ ] Every tag has an owner and a last-used date [ ] Unused tags removed [ ] Chat, heatmaps, A/B testing and ad pixels load after interaction [ ] Hero image sized and preloaded [ ] Static assets cached for a year [ ] Performance budget check on new tags [ ] Field LCP under 2.5s and INP under 200ms [ ] Before-and-after published
Risks and how to handle them
Marketing loses data
Keep server-side analytics and consent-based loading, and agree the tag list with each team.
Scores slip again
Block new tags that break the performance budget.
Evidence
- Google PageSpeedwpengine.com homepage on mobile: performance 32/100; in the lab test the main content (the portal dashboard illustration) takes 17.3s to appear, blocking time is 1,690ms, and the page downloads 3.8 MB, 2.9 MB of it JavaScript, from 24 third-party hosts (Google Tag Manager alone 1.1 MB). Real visitors on this page fail Core Web Vitals on loading (LCP 3.1s, target 2.5s) and responsiveness (INP 318ms, target 200ms); the site as a whole is at 2.2s LCP and 20% faster than before. Top fixes: unused JavaScript (about 2.7s, 1 MB) and cache lifetimes (about 2.0s). The server header reads "WP Engine Headless Platform".Source
- Your websiteHomepage: "Most trusted hosting for WordPress", "Powering 1.5M+ WordPress sites", "99.99% enhanced uptime guarantee", "40% speed improvement after migrating to our platform"; a case study says agency MyWork "achieved an average 20+ increase in Google PageSpeed scores for over 1,000 client websites"; a resource headline reads "Thriving in the agentic web: AI agents are reading your site before your audience does. Is it ready?"Source
- Your websitePlans page: Essential "Starting at $28.00 USD / per month, billed annually. Pay $336.00 today" for 25,000-400,000 visits a month on a shared environment; Business "Starting at $400.00 USD / per month" with "Get in touch"; Enterprise "Talk to sales". A pre-launch Core Web Vitals review is an add-on, not included on Essential. Prices show in USD, GBP, EUR, CAD and AUD. The plans page has no free trial offer.Source
- Your websiteThe main menu lists Managed Hosting, eCommerce, Newsroom and Headless platforms and, under Extensions & Tools, Smart Plugin Manager, Site Monitoring, Global Edge Security, NitroPack, Smart Search AI and Managed Vector Database. The NitroPack item links off-site to nitropack.io. The locale menu offers nine countries.Source