🧪 Methodology:
The performance scores featured in this article are calculated using data from the Chrome User Experience Report (CrUX). To best reflect real-world mobile performance, our scoring model aligns with the Lighthouse weighting:
FCP (First Contentful Paint): 10%
LCP (Largest Contentful Paint): 35%
CLS (Cumulative Layout Shift): 25%
INP (Interaction to Next Paint): 30%
CrUX provides a holistic view of Core Web Vitals for each analyzed site, based on the 75th percentile of real-user data over a rolling 28-day window. Each site’s overall performance score is a weighted average of these four metrics, normalized to a score out of 100.
⚠️ Important note: This is not the PageSpeed Insights score — the rankings below are based exclusively on this custom scoring methodology.
Each month, we analyze the mobile web performance of:
✅ The 50 most visited websites in France
🛒 The top 30 e-commerce platforms
📰 The top 20 media outlets
✈️ The 20 leading travel websites
Let’s dive into the August 2025 leaderboard.
Web Performance ranking: France’s 50 most visited sites
Many teams used the summer period to deploy web performance optimizations.
The result: the Top 50 ranking was significantly shaken up, with dramatic climbs and notable drops.
More than ever, user experience (UX) has become a decisive factor for staying competitive.
🏆 TOP 3: WHO’S LEADING THE PACK?
The Top 3 in July remains stable, with slight movement:
- 🥇 Ministère de l’Intérieur retains its #1 position with a perfect score and an INP of 86 ms.
- 🥈 Assurance Maladie also remains second, with an INP of 116 ms.
- 🥉 Service-Public.fr holds its spot on the podium.
📈 MOST IMPROVED IN THE TOP 50
- Free (+30 positions, 9th): a spectacular jump thanks to improved visual stability (CLS dropped from 0.29 to 0.07—now green). With all three Core Web Vitals in the green, the site shows the direct impact of focused optimization.
- Darty (+9, 12th): improved loading experience (LCP –184 ms) and enhanced stability.
- Gala (+11, 18th): CLS better managed (–0.10), providing users with a more stable interface.
- Linternaute.com (+5, 27th): multi-metric optimization with LCP down 496 ms and INP reduced by 65 ms.
- Vinted (+4, 42nd): significant gains across all metrics (LCP –238 ms, INP –67 ms, CLS –0.18), leading to a smoother and more stable experience.
- Le Monde (+4, 8th): interactivity and visual stability further improved (LCP –41 ms, CLS down).
These improvements highlight how continuous optimization pays off. Even seemingly minor gains—every millisecond counts—can significantly impact rankings. Most of the sites climbing the chart have focused heavily on Interaction to Next Paint (INP). Why? Because a good FID doesn’t always mean a good INP.
Remember: FID only measured the delay of the first interaction. INP, by contrast, evaluates responsiveness throughout the entire user session, which explains these sharper shifts in ranking.
🔻 WHO’S FALLING BEHIND?
While some players continue to rise, others are facing headwinds:
20 Minutes (–6, 20th): slower loading (LCP +95 ms).
AliExpress (–6, 24th): degraded LCP (+81 ms), worsening user experience.
Actu.fr (–5, 21st): performance drop, LCP +46 ms.
Franceinfo (–5, 15th): less smooth interactivity with INP up +42 ms.
La Redoute (–5, 16th): slight LCP degradation (+16 ms).
L’Équipe (–5, 33rd): general decline across all metrics.
Leboncoin.fr (–4, 46th): slower interactivity (+66 ms INP).
Marmiton (–4, 30th): rising CLS (+0.02) and slower INP (+36 ms).
Google (–3, 11th): heavier LCP (+155 ms), enough to lose 3 spots.
📊 How Is the Top 50 Performing on Core Web Vitals?
Web performance is a constant race: even brief lapses can lead to steep drops in ranking. That’s why automation and consistency in best practices are essential—because webperf is never “done.”
✅ 37% of sites have all 3 Core Web Vitals in the green (vs 31% in July).
✅ 80% show a good LCP (<2.5s).
✅ 80% have good visual stability (CLS < 0.1).
⚠️ Only 49% ensure smooth interactivity (INP < 200 ms), still the hardest metric to master.
INP remains the toughest metric to master, as it reflects the responsiveness of the entire browsing session—not just the first interaction. A page may feel fast at first click… but become frustrating as soon as a user tries to engage further.
Now, here is the e-commerce ranking, for which web performance is a business and SEO challenge.
E-commerce Performance
Faster loading pages, snappy interactions, and no layout shifts at checkou, these are the foundations of a high-performing conversion funnel.
🏆 TOP 3: A STABLE, HIGH-PERFORMING PODIUM
Sézane (1st): still the leader, with a strong INP of 136 ms and perfectly managed metrics.
IKEA (2nd): maintains 2nd place, with solid interactivity (INP: 146 ms) and well-controlled LCP (1.1s).
Gifi (3rd, +1): climbs onto the podium thanks to simultaneous optimizations across all Core Web Vitals (LCP –28 ms, INP –18 ms, CLS –0.04). Last month, Gifi jumped 14 spots due to improved CLS. The challenge now is to keep that momentum going.
Leroy Merlin slips to 4th with a slightly higher INP (152 ms).
These leaders stand out by passing all Core Web Vitals, including the elusive INP. They’re excellent benchmarks for what it takes to stay competitive, boost conversion rates, and deliver a flawless user experience.
📈 WHO’S MOVING UP?
Darty (7th, +6): major improvement in LCP (–184 ms) and visual stability (CLS –0.03).
Castorama (21st, +6): LCP reduced by 213 ms, INP down 99 ms, CLS stabilized (–0.04).
Groupon (18th, +3): LCP improved by 298 ms, speeding up content rendering.
Manomano (12th, +2): page stability enhanced with CLS down by 0.02.
Leclerc (28th, +2): strong progress on speed and stability (LCP –290 ms, CLS –0.09).
🔻 WHO’S FALLING BEHIND?
AliExpress (15th, –4): continues to decline, with LCP up +81 ms.
Etsy (10th, –3): LCP degradation (+44 ms), despite decent INP.
Zalando (13th, –3): slight overall decline (LCP +26 ms), enough to lose three places in this tight ranking.
Media websites: The most visited sites on mobile
The ultra-competitive media sector saw a lot of movement this month. Several long-standing players are regaining ground, while others fall back under the pressure of continuous optimizations.
🏆 TOP 3: A CONSISTENTLY COMPETITIVE PODIUM
BFMTV (1st): remains leader with solid interactivity (INP 119 ms) and controlled visual stability.
Le Monde (2nd, +1): gains one spot by optimizing LCP (–41 ms) and visual stability (CLS –0.03).
Le Parisien (3rd, +2): returns to the podium with triple improvements (LCP –85 ms, INP –10 ms, CLS –0.04).
At the top of the leaderboard, every optimization matters. Even small changes can make or break rankings.
📈 CLIMBING THE RANKS THIS MONTH:
Gala (5th, +8): makes a major leap with better visual stability (CLS –0.10, now green) and slightly improved LCP (–22 ms).
L’Internaute (11th, +5): major gains in UX with LCP –496 ms and INP –65 ms, for smoother navigation.
🔻 SLIPPING BACK:
Franceinfo (4th, –2): drops off the podium due to worse interactivity (INP +42 ms).
20 Minutes (7th, –3): LCP worsens by +95 ms.
Actu.fr (8th, –2): down due to LCP increase (+46 ms).
Le Journal des Femmes (12th, –2): LCP +64 ms slows load time.
Marmiton (13th, –2): CLS worsens (+0.02), affecting stability.
L’Équipe (16th, –4): loses 4 spots with LCP +29 ms and CLS +0.03.
Travel: Web Performance of the most visited travel sites
Still catching up: the travel sector lags behind in UX
The travel industry remains under pressure, with lots of room to improve UX fluidity and speed. Few changes this month, but key optimizations and degradations are shifting the leaderboard.
🏆 TOP 3: UNCHANGED PODIUM
Easyvoyage: still leading, with strong metrics across the board.
SNCF Connect: holds 2nd place with smooth interactivity (INP: 171 ms).
Tripadvisor: closes the Top 3 with near-green interactivity (INP: 206 ms).
Only Easyvoyage and SNCF Connect have all metrics in the green.
📈 ON THE RISE:
Viagogo (11th, +2): strong loading time improvement (LCP –294 ms) and slightly better interactivity (INP –11 ms), resulting in a smoother experience.
🔻 LOSING GROUND:
Liligo (12th, –2): LCP worsens by +189 ms, slowing page load.
TheTrainline (14th, –2): LCP +314 ms and degraded visual stability (CLS +0.04).
❌ Travel still struggles
Among all the sectors analyzed, travel consistently shows the weakest performance—a clear signal that significant optimization opportunities remain. Even the top performers still have work to do. The average score stagnates at 75, compared to 89 for e-commerce and 90 for media.
👉 Only 19% (vs 11% in July) of travel sites meet all 3 Core Web Vitals, according to Google’s thresholds.
✅ 32% have a good LCP
✅ 58% (vs 63% in July) show good visual stability (CLS)
❌ Only 11% offer smooth interactivity (INP)
That wraps up this month’s Web Performance Ranking! As you’ve seen, rankings shift significantly—both overall and by sector. One key takeaway: performance is never static. It evolves with every change you make to your website. That’s why web performance isn’t a one-time project—it’s an ongoing team effort.
Behind every millisecond saved lies a better user experience, reduced friction, and smoother paths to conversion.
In 2025, users expect more than ever.
To stay ahead, it’s not just about meeting Core Web Vitals thresholds—but sustaining them over time. That’s what drives real results: stronger UX, improved SEO, and better business outcomes.
With consistent effort and the right monitoring, you can climb the rankings—but more importantly, you’ll deliver a better experience than your competitors, and see your conversions rise as a result.
⭐ See you next month for a fresh look at the web experience across top French websites!
Where does your site stand in the Webperf Ranking?
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