About Haarshop
Haarshop is a leading specialist in professional hair and beauty products across Switzerland, Germany, and the Netherlands. In the Dutch and German markets alone, they offer 35,000+ products and earn millions in revenue per year.
The webshop is the core of their business: it’s a platform where customers explore, select, and purchase from an extensive catalog of professional-grade beauty products. To stay competitive in a fast-moving ecommerce space, Haarshop’s team was constantly looking for ways to improve their site’s performance and visibility.
But with a JavaScript-heavy Magento site and tens of thousands of product pages to manage, getting search platforms to consistently crawl and index their full catalog was proving harder than expected.
The Challenges
Slow PageSpeed, poor indexing, and a product catalog that search channels couldn’t see.
Visibility was the primary driver of Haarshop’s traffic and revenue. But the challenge was clear: their JavaScript-rendered pages weren’t being indexed fast enough, and the performance metrics that Google uses to evaluate and rank pages were falling short.
Some of the specific issues they experienced:
- Slow PageSpeed performance. This dragged down Core Web Vitals scores
- Poor indexing. Large portions of their catalog were invisible in search
- Inefficient crawl budget allocation. Googlebot wasn’t making the most of its time on their site
- Slow bot response times. Pages were taking 8.69 seconds to deliver to crawlers
Denzell Bultman, Product Owner Webshop at Haarshop, explains: “We were constantly searching for people and partners who can help us improve the performance of the webshop. Before Prerender.io, we used a lot of resources to optimize our pages, but not with the results we were hoping for.”
The root problem was structural. With a JavaScript-heavy Magento site, bots were arriving at pages before they were fully rendered. This meant that they couldn’t see the content, couldn’t index the products, and couldn’t pass ranking signals back to Google. Standard on-page optimization couldn’t fix that.
The Solution
A cost-effective solution with lightning-fast results.
After evaluating their options, Haarshop decided to put Prerender.io to the test. Rather than a full rollout, they ran a controlled trial for one month, a practical way to validate real-world results before committing.
Through Prerender.io, Haarshop ensured all their pages—including those powered by third-party apps—were fully rendered before delivery to crawlers. That meant search engines were finally seeing complete, indexable versions of every product page.
The trial results were clear. Within two to four weeks, Haarshop’s team was up and running in the Prerender.io dashboard, and the performance improvements were already visible.
They rolled Prerender.io out across the remaining domains shortly after.
We were very positively surprised with the results.
Denzell Bultman
Organic Keywords – DE
Organic Keywords – NL
Organic Traffic Performance – DE
Organic Traffic Performance – NL
The Results
Prerender.io’s impact on Haarshop’s performance was immediate, and the compounding effects on organic visibility followed quickly.
99 PageSpeed Score
Haarshop now holds a Google PageSpeed Insights SEO score of 99 for their desktop site, a top-tier result that signals to Google their pages are well-optimized and worth ranking.
12.6x Crawl Budget Efficiency
One of the clearest signs of Prerender.io’s impact was how dramatically it improved the efficiency of Googlebot’s time on site. By serving pre-rendered pages, Haarshop achieved a 12.6x improvement in crawl budget efficiency, meaning search engines could cover far more of their catalog in every visit.
A 92% Improvement in Crawl Time
Before Prerender.io, delivering a page to a crawler took 8.69 seconds. With Prerender, that dropped to 0.69 seconds, a 92% reduction. Faster delivery means more pages crawled per session and a better signal to Google that the site is technically sound.
30% More Indexed Pages
With bots now receiving fully rendered pages, previously uncrawlable product and category pages became indexable. Haarshop saw a 30% increase in indexed pages, expanding their searchable catalog without any additional engineering work.
50% Increase in Organic Traffic
The downstream effect of better indexing and technical performance was a 50% boost in organic traffic. This directly translates into more product discovery and revenue for the business.
Denzell Bultman
An Ongoing Solution for Growth
For Haarshop, Prerender.io is now an essential part of how they compete in a crowded ecommerce market.
By ensuring search engines and AI crawlers consistently receive fully rendered pages across their Dutch and German sites, Haarshop has turned a technical SEO problem into a measurable growth engine, leading to 30% greater indexing and 50% more traffic, without needing an engineering overhaul.
With 35,000+ products requiring frequent crawling and indexing to stay competitive, the speed and reliability of Prerender.io’s solution wasn’t a nice-to-have. Instead, it was the difference between products showing up in search or not.
For ecommerce teams managing large, JavaScript-heavy catalogs, Haarshop’s experience shows that the right rendering foundation doesn’t just fix technical problems. It unlocks the organic visibility, traffic, and revenue growth that everything else depends on.
