PageSpeed.ONE Awards 2025 Winners: jrc.cz and woox.sk

Website speed isn't a mere technical detail; it's a critical business issue. At PageSpeed.ONE, we help dozens of websites each year achieve higher speeds and a more enjoyable user experience.

In 2023 and 2024, we sought out the fastest Czech e-shop. This year, we're expanding the concept into the PageSpeed.ONE Awards, recognizing Czech and Slovak websites across various categories.

Before we delve into evaluations and results, let's discuss why speed remains crucial and whether anything has changed in the current context.

Why Focus on Speed in 2025? Market Demands Are Changing, and AI is Starting to Have an Impact#

Faster websites tend to have better conversions, attract more visitors through SEO, and help save on PPC advertising.

For instance, the deNatura e-shop saw a 17% increase in visits from Google after speeding up with PageSpeed.ONE.

Is speed still a topic in 2025, with fast connections and swift devices? Absolutely. Most websites still struggle to meet increasingly stringent market demands.

1. User Expectations Are Rising.
   The patience of Generation Z and younger is measured in mere seconds or hundreds of milliseconds.
2. Web Technologies Favor Developer Convenience over User Speed.
   The widespread shift to client-side rendering, kicked off by frameworks like React, “enhances” websites with tons of JavaScript, which can be painfully slow on less capable devices.
3. Device Disparities Are Increasing.
   You might have a high-end mobile in your pocket, but try using your websites on a device costing 200 EUR. You’ll be surprised by how poorly it performs.

Speed and Stability Are Crucial, Especially in the Age of AI#

This year, we've observed a sharp increase in bot traffic among our clients. AI bots burden servers like real users do, but they (for now) don’t buy anything, nor do they add any value.

For instance, in a span of seven days, we at PageSpeed.ONE recorded four million queries from the USA for a successful Czech e-shop, 90% of which were from an AI indexer by Meta. Bots can be unpredictable.

They often cause overloads just when you need your website the most.

How We Chose the PageSpeed.ONE Awards This Year#

Compared to previous years (2023 and 2024), we've made several changes this year:

1. More Categories Added.
   This year, besides e-shops, content, corporate, and other websites competed.
2. Competition Expanded to Slovakia.
   For the first time, we selected the fastest websites not only in the Czech Republic but also in Slovakia.
3. Open for Submissions.
   Previously, we chose the websites ourselves, but this year you could submit your own project. We evaluated each site using monitoring PLUS.
4. New Speed Score (SPS).
   The new overall website speed score (PageSpeed.ONE score) operates on different principles. For instance, it considers not only metric states but also the distribution of their values among users.

We evaluated the websites using data from November 28, 2025, and were eager to see the results. Now, let's unveil them.

PageSpeed.ONE Awards for the Czech Republic: The Winner is JRC.cz#

Websites from the Smarty.cz team are renowned for their phenomenal speed. Following last year's victory by iWant.cz, we now see JRC.cz in the top spot in the Czech Republic, with the main website of the brand, Smarty.cz, in third place.

A round of applause, please!

What Can You Learn from JRC's Website?#

• Performance Begins on the Backend. JRC.cz websites are distinguished by excellent server response. The TTFB metric value of 0.24 s is fantastic for a relatively large e-shop. Moreover, it demonstrates stability even during Black Friday. Excellent work!
• Well-Optimized Frontend. The LCP metric (Largest Contentful Paint) value on mobile is 0.69 s, meaning the frontend delivers content in an impressive 450 ms. This is aided by good old data optimization – for example, the HTML product page is just 15 kB, CSS is 19 kB, and JS is around 300 kB.
• JRC.cz also makes excellent use of modern optimization tools – from Back/Forward Cache to images in WebP format and lazy loading.
• Old-Fashioned Server Technology. The fact that Smarty doesn't use React or other modern frontend gimmicks allows them to reduce costs on optimizations.

Top 3 Websites in PageSpeed.ONE Awards for the Czech Republic#

Congratulations to these websites for their excellent speed:

	Website	Score (SPS) %
1	jrc.cz	97.4
2	mojecalibra.cz	96.8
3	kornfeil.com	96.6

Now, let's focus on the winners of the individual industry rankings.

E-commerce#

The top three positions in the e-commerce category for the Czech Republic closely resemble the overall rankings. It’s clear that those in e-commerce understand that speed brings conversions.

	Website	Score (SPS) %
1	jrc.cz	97.4
2	mojecalibra.cz	96.8
3	smarty.cz	96.5

E-commerce Climber of the Year#

Since we have previously announced the fastest e-shop for the Czech Republic, we have data for placements in long-term rankings. The e-shop that moved the most in the rankings between 2024 and 2025 is Grizly.cz. While it still has some way to go to reach the speed of the best websites, it advanced 26 positions in the rankings.

	Website	Score (SPS) %
1	grizly.cz	86.1

Corporate#

The fastest corporate website for 2025 is Kornfeil.com, with assistance from the SUPERKODERS agency.

	Website	Score (SPS) %
1	kornfeil.com	96.6
2	sedlakovalegal.cz	95.8
3	dachdecker.cz	95.0

Other#

We also selected winners among the “unclassifiable” or rather difficult-to-classify websites in the previous categories. Congratulations to the team behind the useful project Donio.cz.

	Website	Score (SPS) %
1	donio.cz	93.5

PageSpeed.ONE Awards for Slovakia: The Winner is WOOX.sk#

For the first time, we're selecting the fastest websites in Slovakia. The PageSpeed.ONE Awards go to WOOX.sk and the mime digital agency. A round of applause, please!

WOOX.sk is a practical demonstration of what we've been saying for a long time. Websites on boxed solutions can achieve top-notch performance.

The Slovak WOOX is built on the Shoptet platform, which we've talked a lot about this year, collaborated on optimizing the platform's core, and for some time now, Shoptet optimization has been among our services. How does this website achieve its results?

• Excellent Backend Response.
  If there's one thing Shoptet can't be denied, it's the TTFB metric value they deliver across all their 40,000 e-shops. For WOOX.sk, it's 0.36 s on mobile.

• Quality Customized Design Adjustments.
  Unlike many other e-shops on this most popular Czech e-commerce platform, WOOX's customizations are technically crafted to not spoil the user experience or degrade frontend metrics like LCP (loading speed) and CLS (layout stability).

Top 3 Websites in PageSpeed.ONE Awards for Slovakia#

Congratulations to all three awarded websites!

	Website	Score (SPS) %
1	woox.sk	93.7
2	ecommercebridge.sk	93.6
3	vasekupony.sk	93.4

E-commerce#

Slovak WOOX naturally also won the E-commerce category. Second place goes to one of the Kuplio team's websites, and third to the Slovak "Nay," part of Zlín's HP Tronic.

	Website	Score (SPS) %
1	woox.sk	93.7
2	vasekupony.sk	93.4
3	nay.sk	93.1

Content & Media#

The PageSpeed.ONE Awards for Slovakia goes to E-commerce Bridge.

	Website	Score (SPS) %
1	ecommercebridge.sk	93.6
2	livemusic.sk	92.9
3	portalvs.sk	90.7

Corporate#

The fastest corporate website for 2025 is AQT.sk, again built on Shoptet.

	Website	Score (SPS) %
1	aqt.sk	93.0
2	gardeon.sk	91.0
3	intercom.sk	87.6

Congratulations to all the winners and honorees in the PageSpeed.ONE Awards! What can all web developers take away from the competition? After analyzing this year's results and considering our experiences with optimizing websites for PageSpeed.ONE clients, we've prepared a few recommendations for you.

Effective Optimizations for Improving Website Speed#

1. Mind Your Backend. This year, we began focusing on the TTFB metric, the speed of backend response, during optimizations. A slow backend negatively impacts user experience across all Core Web Vitals metrics. We've seen how unpreparedness for fluctuations caused by Black Friday or AI bots harms many businesses.
2. Watch Out for Slow Interactions. Another major theme this year is INP optimization, or interaction response speed. We help clients optimize JavaScript at the developer level, but the setup of analytics, particularly GTM, is becoming a crucial topic.
3. Correct Lazy Loading. This simple LCP (Largest Contentful Paint) speed optimization continues to cause headaches because simple things can be too easily messed up. Developers, ensure you truly understand the concept of lazy loading and check your implementation.
4. Back/Forward Cache. How can you improve user experience in a way your boss will notice? “Enable” BFcache on your website.
5. Go with Cloudflare. Yes, a recent outage of this popular service was a bit painful for all of us. However, if we compare it to how Cloudflare can help with speed, stability, or security, the balance is overwhelmingly positive. We now assist with Cloudflare as well.
6. Implement WebP Images. A classic conclusion. We still encounter websites that haven’t utilized this relatively easy speed boost. Still using outdated JPEG images? Implement WebP, it almost always helps significantly and visibly speeds up your website.

Looking for more general tips? Check out our checklist.

Remember, every website is unique, and the most effective way is to choose customized optimizations.

How Do Your Websites Perform?#

Check out the Core Web Vitals metrics for the top three websites in the PageSpeed.ONE Awards 2025:

Want to know how your website fares in this comparison?

• Measure your site's speed once on pagespeed.one and get the speed score (SPS) or values of individual metrics.
• With monitoring PLUS, which offers a free monthly trial, you can find even more information, including how much slower your website is compared to the fastest ones.

Congratulations to all the honorees in the PageSpeed.ONE Awards! And thank you to all the developers who actively address speed, making the web a more usable place for users and simultaneously improving their business.

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Want to participate in the next round? Simply get PLUS speed monitoring. Monitoring is the first step towards a deliberate and data-driven improvement of your website's speed.

Our team of consultants is of course happy to assist you with speed. Schedule a 30-minute free consultation.

Tags:Web Performance