Slow websites quietly lose customers every day
Every visitor arrives with intent.
A slow website gives them a reason to leave.
Faster loading, smoother interactions, and better visual stability create a better user experience that can improve engagement, support stronger search visibility, and help convert more visitors into customers.
That's why achieving green Core Web Vitals is more than a technical milestone—it's a business advantage.
What makes us different
Most agencies promise optimization.
We guarantee results.
Other agencies
- Best effort
- Hourly billing
- No guarantees
- Unknown outcome
EcDev Studio
- Fixed outcome
- Green Core Web Vitals
- Money Back Guarantee
- Proven optimization process
What's included
Everything required to reach Google's green zone.
Our process
We analyze your website and determine whether it qualifies for our guarantee.
You receive a clear, fixed-price proposal with defined targets and timeline — no surprises.
Our engineers optimize your site’s performance, tackling every Core Web Vitals metric.
We verify the results against the agreed targets using real-world field data.
Your site meets the guaranteed Core Web Vitals targets — or you get your money back.
The guarantee
We hit your Core Web Vitals targets — or you pay nothing
If your website qualifies after our initial assessment, we guarantee the agreed Core Web Vitals targets.
If we don’t achieve them, you’ll receive a full refund.
No hidden conditions.
No fine print.
Case studies
Sammamish Mortgage
Sammamish Mortgage is a US-based mortgage company that has been working with EcDev studio to refresh their company website and rebuild the existing mortgage tools.
+8–12% organic sessions in 3 months-18% mobile bouncesCore Web Vitals (Desktop)
When the main element (hero, image, headline) becomes visible.
Response time to clicks, taps, inputs. Measures real responsiveness.
How much the page "jumps" while loading. Lower is more stable
ZoomRide
Zoom Ride is a ride-sharing and transport service platform. It functions primarily as a mobile application providing ride-hailing options, and it also specializing in personal electric vehicles.
Layout doesn't jump: +6–9% to cart conversion on mobileCore Web Vitals (Mobile)
When the main element (hero, image, headline) becomes visible.
Response time to clicks, taps, inputs. Measures real responsiveness.
How much the page "jumps" while loading. Lower is more stable
Why we can guarantee it
WordPress engineering
Unlike general web agencies, we specialize in WordPress performance engineering.
Nothing is outsourced
The engineer who audits your site is the one who ships the fix. Same team, start to finish.
9 years of expertise
Our team has been building and optimizing WordPress websites since 2017.
Assessment first
Before accepting a project, we perform a detailed assessment to make sure the target is realistically achievable.
Frequently asked questions
No. Many clients begin with a small, clearly defined scope focused on improving specific areas of their website. This allows you to evaluate our approach, collaboration style, and impact before considering larger initiatives.
Our core web vitals optimization service includes regular updates, typically weekly or as needed to maintain optimal performance. We also conduct quarterly comprehensive reviews to ensure continued compliance with Google’s Core Web Vitals.
On the contrary, our service is specifically designed to improve your website’s performance. We optimize code, images, and server configurations to ensure faster loading times and a better user experience.
Core Web Vitals are a set of standardized metrics developed by Google to measure key aspects of user experience on the web. They include Largest Contentful Paint (LCP), which measures loading performance; First Input Delay (FID), which measures interactivity; and Cumulative Layout Shift (CLS), which measures visual stability.
Visible improvements typically appear within 1-2 weeks, depending on your website's current performance. We provide detailed reports and analytics to track progress and ensure you see measurable results within the first month.
Ready to get Green Core Web Vitals?
Stop guessing whether optimization will work.
If your website qualifies, we'll guarantee the result.
Otherwise, we'll tell you honestly before you spend a dollar.