What is Speed Kit?
Speed Kit is a web performance acceleration product that operates as a service-worker-based reverse proxy in front of an existing site. Rather than just measuring page speed, it actively rewrites delivery — caching, prefetching and optimising responses to improve Core Web Vitals (LCP, INP, CLS) without rebuilding the underlying site. It is sold to ecommerce and content sites that want a measurable Core Web Vitals lift without an engineering re-platform.
Speed Kit is acceleration-first, not monitoring-first. It pairs delivery optimisation with a reporting dashboard that shows before/after CWV improvements and uplift impact, but it is not a synthetic monitoring or load testing platform.
When Speed Kit is the right tool
Speed Kit is a fair fit when:
- You need active CWV uplift, not just measurement. A drop-in service worker that rewrites delivery without code changes.
- Ecommerce or content stack. Targeted at large WooCommerce, Shopify, custom commerce or media sites where CWV directly affects revenue.
- You can't re-platform. Legacy stacks where rebuilding for performance is impractical short-term.
- Vendor-led optimisation preferred. Service-led contracts with measurable CWV outcomes.
If your problem is "our LCP is 4 seconds and we cannot rebuild the site," Speed Kit's active acceleration is purpose-built for that.
Where Speed Kit stops being enough
Speed Kit is a delivery layer, not a monitoring or testing platform:
- No load testing. Speed Kit accelerates pages but cannot simulate concurrent users to validate capacity.
- No API monitoring. Backend uptime, SLA and JSON validation are out of scope.
- No synthetic browser monitoring. Multi-step user journeys (login, checkout) need a separate synthetic tool.
- Active rewrite, not passive measurement. Some teams want to measure and fix at source rather than ship optimisations through a third-party service worker.
- Single-purpose pricing. Optimising delivery is one need; monitoring, load testing and CWV tracking still need separate tools alongside.
LoadFocus vs Speed Kit — feature comparison
How LoadFocus compares against Speed Kit. Pricing accurate as of May 2026.
| Feature | LoadFocus | Speed Kit |
|---|---|---|
| Cost | Free tier; from $29/mo | Sales-led, site-traffic-based |
| Core Web Vitals monitoring | Yes (Lighthouse + CrUX) | Yes (uplift dashboard) |
| Active delivery acceleration | No | Yes (specialty) |
| Load testing | Yes (up to 12,500 VUs) | No |
| API monitoring | Yes | No |
| Real-browser synthetic | Yes (Selenium/Playwright) | Limited (uplift only) |
| Multi-region locations | 25+ globally | Edge network |
| Self-service signup | Yes | Sales-assisted |
| Pay-per-test pricing | Yes | Traffic-based contract |
| CI/CD integration | Yes (API + GitHub Action) | Limited |
FAQ
Is LoadFocus a direct replacement for Speed Kit?
No — they solve different problems. Speed Kit actively accelerates delivery to lift Core Web Vitals; LoadFocus measures CWV (lab + field) plus runs load testing and API monitoring. Most teams use them together: Speed Kit for the active uplift, LoadFocus for ongoing measurement, load testing and API checks.
Can LoadFocus measure my Speed Kit deployment?
Yes. LoadFocus runs scheduled Lighthouse audits and pulls CrUX field data, so you can verify Speed Kit's claimed CWV uplift independently and track it over time.
What about load testing and API monitoring?
Yes — on the same LoadFocus account. Speed Kit does not cover these; LoadFocus combines load testing (up to 12,500 VUs), API monitoring (uptime, SLA, JSON Schema) and CWV tracking in one product.
How does pricing compare?
Speed Kit is sales-led with traffic-based contracts. LoadFocus uses transparent monthly tiers from $29/month with concurrent VUs and check frequency published upfront.
How long does setup take?
Minutes for LoadFocus monitoring (paste a URL, pick cadence). Speed Kit deployment involves more change-management since it sits as a delivery layer in front of your site.
Can it run in CI/CD?
Yes. LoadFocus exposes a REST API and a GitHub Action so Lighthouse audits and load tests run on every merge with thresholds for CWV, response time and error rate.
Try LoadFocus free
If you're using Speed Kit for active acceleration and want CWV measurement, load testing and API monitoring on a single account alongside it, LoadFocus complements your stack. Sign up at loadfocus.com/signup — no credit card — and run your first CWV audit and load test in minutes.
