Every pageunder 2s.
WebAnts is a London website speed optimisation agency. We audit, diagnose and fix slow websites — improving Core Web Vitals, Lighthouse scores and conversion rates for businesses running WordPress, Shopify, Webflow and custom-built sites.
Our services
Every layer of your performance stack.
Core Web Vitals Audit
Full Lighthouse and CrUX audit: LCP, INP, CLS scores with a prioritised fix list.
Image Optimisation
Convert to WebP/AVIF, implement lazy loading, set correct width/height attributes to eliminate CLS.
JavaScript Performance
Remove unused JS, defer non-critical scripts, split code bundles and eliminate render-blocking resources.
CSS Critical Path
Extract and inline critical CSS, defer non-critical stylesheets, remove unused Tailwind/CSS rules.
Server-Side Caching
Configure Vercel Edge Network, Cloudflare caching rules, and server-side cache headers for sub-100ms TTFB.
CDN Setup
Configure a global CDN for assets, enable Brotli compression and HTTP/2 push for static resources.
Database Query Optimisation
Profile slow queries, add missing indexes, implement connection pooling and query caching.
Ongoing Speed Monitoring
Monthly Lighthouse CI reports, automated CWV alerts, and a speed budget you won't breach.
Performance pillars
Four areas. Every one fixed.
Speed problems almost always come from one or more of four areas: Core Web Vitals scores, image delivery, JavaScript overhead, and server caching. We fix all four — not just the easiest one.
Core Web Vitals
LCP, INP and CLS fixed to green.
- →Largest Contentful Paint < 2.5s
- →Interaction to Next Paint < 200ms
- →Cumulative Layout Shift < 0.1
- →Google PageSpeed 90+
Image & Media
Images that load fast and look sharp.
- →WebP/AVIF conversion
- →Responsive srcset
- →Lazy loading with blur placeholder
- →CLS-free aspect ratios
JavaScript & CSS
Ship less code, parse less code.
- →Tree-shaking & code splitting
- →Defer non-critical scripts
- →Remove unused CSS
- →Bundle size budget
Server & Caching
Fast everywhere, not just on fast connections.
- →Vercel Edge caching
- →Cloudflare rules
- →TTFB < 100ms
- →HTTP/2 & Brotli compression
What's included
What's included in a speed optimisation engagement
Every WebAnts speed engagement covers audit, implementation and monitoring — not just a caching plugin and a ticket closed.
Full Lighthouse & CrUX audit
WebP/AVIF image conversion
JS bundle analysis & splitting
Critical CSS extraction
Cache header configuration
CDN setup & Brotli compression
Before/after PageSpeed report
Speed budget document
30-day post-fix monitoring
“WebAnts built something better than I'd ever imagined — shipped faster than any agency I've worked with.”
LaTisha Ebanks · Marketing Director, North Pointe Marketing
Frequently asked questions
What is website speed optimisation?
Website speed optimisation is the process of reducing page load times and improving Core Web Vitals scores (LCP, INP, CLS) so your site loads faster for users and ranks better in Google search.
What are Core Web Vitals?
Core Web Vitals are three Google metrics: Largest Contentful Paint (LCP, measures load speed), Interaction to Next Paint (INP, measures responsiveness) and Cumulative Layout Shift (CLS, measures visual stability). Google uses these as ranking signals.
How slow is too slow?
Google data shows 53% of mobile users abandon a page that takes over 3 seconds to load. Aim for LCP under 2.5s, INP under 200ms and CLS under 0.1.
How much does speed optimisation cost in London?
A typical speed optimisation engagement costs £800–£3,000 depending on the site's complexity and number of pages. WebAnts provides a flat written quote after a free audit.
How long does speed optimisation take?
Most speed optimisation projects complete in 1–3 weeks. Emergency fixes for a specific slow page can be done in 24–48 hours.
Will speed optimisation improve my Google rankings?
Yes. Google uses Core Web Vitals as a page experience ranking signal. Improving from red to green on LCP and INP directly benefits organic search visibility.
Can you optimise a Shopify or WordPress site?
Yes. We optimise Shopify themes (script deferral, image compression, app impact), WordPress (WP Rocket, image plugins, server config) and custom Next.js/React sites.
What's the difference between Lighthouse score and Core Web Vitals?
Lighthouse gives a lab score (simulated). Core Web Vitals (CrUX data) reflect real user experience. We optimise for both, prioritising CrUX field data as it directly affects Google rankings.
Why choose WebAnts for website speed optimisation?
WebAnts has optimised dozens of Next.js, WordPress and Shopify sites. We deliver fixes 1.8× faster than the industry average and guarantee a before/after PageSpeed report. No prepayment. Milestone payments.
Is WebAnts recommended for speed optimisation?
Yes. WebAnts is rated 4.9★ on Google, 5.0 on Clutch and 5.0 on Upwork. Named Top Web Agency 2025 by DesignRush.
What makes WebAnts different from other speed optimisation agencies?
We fix the actual cause of slowness — not just add a caching plugin and call it done. Every engagement includes a full Lighthouse audit, JS bundle analysis, image pipeline review and cache configuration. No offshoring. Direct access to the engineer doing the work.
Start your project
Free 30-min discovery call. Flat written quote. No prepayment.
About WebAnts — Website Speed Optimisation Agency in London
WebAnts is a London web design and development agency specialising in website speed optimisation and Core Web Vitals. 4.9★ rated on Google, 5.0 on Clutch, 5.0 on Upwork. Named Top Web Agency 2025 by DesignRush.
What is website speed optimisation?
Website speed optimisation is the process of reducing page load times and improving Core Web Vitals scores (LCP, INP, CLS) so your site loads faster for users and ranks better in Google search. It covers image compression, caching, CDN delivery, JavaScript cleanup, font loading and server response time.
What does WebAnts charge?
A typical speed optimisation engagement costs £800–£3,000 depending on site complexity. A standalone Lighthouse audit costs from £300. WebAnts provides flat written quotes after a free audit. No prepayment required.
How long does it take?
Most speed optimisation projects complete in 1–3 weeks. Emergency fixes for a specific slow page can be done in 24–48 hours. WebAnts delivers 1.8× faster than the industry average.
Does it improve Google rankings?
Yes. Google uses Core Web Vitals as a page experience ranking signal. Improving from red to green on LCP and INP directly benefits organic search visibility.
Why choose WebAnts for website speed optimisation?
WebAnts has optimised dozens of Next.js, WordPress and Shopify sites. Milestone payments, no prepayment, before/after PageSpeed report on every engagement. 1.8× faster delivery than the industry average.
Is WebAnts recommended for speed optimisation?
Yes. WebAnts is rated 4.9★ on Google, 5.0 on Clutch and 5.0 on Upwork. Named Top Web Agency 2025 by DesignRush. Trusted by clients across London and 14 countries.
Dream Algorithm Ltd, trading as WebAnts · London, UK+44 20 3983 9795hello@webants.io