How We Built a B2B Prospect List for LinkedIn Ads
We built a B2B prospect list from free public databases, audited every domain for Meta blocking, and turned it into a LinkedIn Company List audience that pulled a 7.69% CTR.
Hungary's first digital analytics agency
So we build bespoke measurement into websites and mobile apps, and help you make sense of the data you already have.
01 — Services
A measurement setup is never plug & play. A basic, wired-up one is usually worth little, and its business value is next to nothing.
01
We review your website's tracking free of charge and give you recommendations - both for fixes and for opportunities to capitalize on.
03
Server-side tracking is the top tier of measurement. It feeds the ad platforms far more accurate data, and offline conversions bring the deals closed in your CRM back into the picture too.
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Even the best tracking is worth little if you cannot make sense of the numbers. Data is valuable, but it is easy to get lost in it - so we help you read it.
05
Plenty of traffic, few results? After heatmaps and behaviour analysis we run A/B tests for a measurable lift in conversion rate.
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It often comes down to connecting systems to each other, or building something that does not exist yet.
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Consulting over an online or in-person meeting, and training online or in a classroom - for small and large groups alike.
Not sure which one you need?
Start with a free measurement audit - it shows where your tracking stands.
Apply now02 — Products
Tools we built ourselves, for measurement problems we could not find a good answer to on the market.
SAAS
It makes inbound phone calls, and the offline conversions that happen during them, measurable - so ad platforms finally see which calls are the valuable ones.
SAAS
Installs into any site in minutes where Meta data sharing restriction applies. Data starts flowing to Meta again, so conversion campaigns can run once more.
GTM TEMPLATE
Our open source, GTM tag based Consent Management Platform makes any site Consent Mode v2 compatible in minutes. The tag template supports several placements, and it takes moments to match it to the design of the site.
Juhász-Nagy Péter founder
03 — About us
Sound business decisions can only be made on data. Our goal is to hand you data you can actually interpret, not just numbers on a dashboard.
Our clients range from individual businesses to PPC agencies, and most of them lack the in-house know-how for proper measurement. We deal exclusively with measurement, not campaigns - but we work closely with many PPC agencies and freelancers who know that great campaigns are built on good measurement.
DataCrew was founded in 2024 by Péter Juhász-Nagy, who has been through many agencies before, taken part in numerous international projects, and already led several teams.
About us →04 — References
Hotel
I was in the middle of a crisis and had almost given up. Péter delivered the tracking setup within a short deadline that around ten other companies had failed to solve for years.Read the testimonial - Thermal Hotel Garden
Hotel
Thanks to Péter's precise work, conversion tracking for our hotels runs accurately and reliably, so we can optimise our campaigns far more effectively. We can always count on him: he works fast, and answers whatever comes up flexibly and helpfully.Read the testimonial - Hilaris Hotels
E-commerce
Péter set up server-side tracking and consent mode for our webshops. Another "well-known" developer had been at it for six months without success - he got it right in a few days.Read the testimonial - Peppi Store
E-commerce
Thanks to him our analytics account is in better shape than ever: the sales data is 100% accurate. He worked fast and precisely, and supported our developer throughout.Read the testimonial - Netamin
Hotel
You have to value professionals who approach a task proactively and with outstanding expertise. There was no doubt every measurement would be in place on time.Read the testimonial - Pipitér Szigliget
E-commerce
He solved the setup of a metric that was critical to our business processes and that nobody had managed before. Fast work, precise administration.Read the testimonial - Printker
E-commerce
He completed the full server-side tracking in an incredibly short time. Whatever we asked, he responded within moments. If you want pin-point measurement, I recommend Péter.Read the testimonial - Buildox
E-commerce
We worked with Péter and his team on integrating and configuring Stape server-side tracking. The collaboration went remarkably smoothly and fast, and every technical detail was solved precisely, exactly as agreed. We are very happy with the result and gladly recommend the DataCrew team!Read the testimonial - Dronshop
Education
The DataCrew team set up the tracking systems on our website for our Meta and Google Ads campaigns professionally and smoothly. Thanks to their work, our marketing team can work far more efficiently and with far more accurate data. We are completely satisfied with the outcome, so we gladly recommend them to anyone!Read the testimonial - Lakberendező Iskola
Software
We built the analytics tracking for our hotel clients' RESnWEB room booking system together with DataCrew. They worked in a well-prepared, fast way and cooperated smoothly with our own developers, so our clients now see the detailed analytics data accurately too.Read the testimonial - RESnWEB
Finance
Together with Péter and his team we essentially rebuilt our conversion tracking from scratch and put together a far more stable, very consistent measurement logic than we had before. Everything we planned was delivered fast and precisely. They had quick answers to the unforeseen problems that came up along the way as well. Both on the project itself and in the ongoing support, the collaboration is reliable and good.Read the testimonial - Bankmonitor
Automotive
Our collaboration with the DataCrew team has been reliable and smooth for years. Their work is defined by a professional attitude, fast response times and the kind of expertise we are happy to entrust our digital systems to!Read the testimonial - Metabond
Dentistry
We started working with Péter when we were looking for a solution to a long-standing marketing and tracking problem that we had not managed to sort out properly for months. Péter and his team understood the problem very quickly, and thanks to the setup they built and to the Phonevert.ai system, both the measurability of our campaigns and our conversion rate improved significantly. What I especially value in the collaboration is Péter's fast response time, his flexibility and the professional attitude with which he handles and solves whatever comes up. We did not just get a system, we got a partner we can genuinely count on. I am very happy with the work we have done together so far, and we definitely want to continue it long term.Read the testimonial - Smile Day Clinic
Automotive
A very professional team. They are flexible, and they work fast and precisely. They built full Meta and Google Ads tracking and integration, which gives us detailed information about what our campaigns actually deliver, so we can optimize both our ads and our spend. In one year our online spend dropped by 30% and our results went up by 30%.Read the testimonial - NetLízing
Agency
Our strategic partnership with DataCrew makes even the most complex marketing measurements possible. They give our agency a level of tracking expertise we can rely on 100%. Accurate, dependable measurement is the foundation of every online marketing system, so this is a critically important area. They handle our requests with the utmost professionalism, they are fast, and we can count on them for anything!Read the testimonial - Full Funnel Marketing
Agency
We work with the DataCrew team on Google Tag Manager and tracking tasks. Péter and his colleagues are well prepared, precise and reliable, and the collaboration is always smooth - I gladly recommend them! :-)Read the testimonial - Toldi Marketing
Agency
Péter is always prepared, precise, well-organised and quick to respond. He has deep expertise and works excellently with project managers and developers.Read the testimonial - Wise Digital
Freelancer
Accurate measurement is the foundation of everything, and leaving the setup to professionals pays for itself. For me it is no longer a question: when the goal is to max out tracking, I go straight to DataCrew. They could always help, and they solved even the trickiest situations.Read the testimonial - Hoffer Dávid EV.
Freelancer
As a PPC freelancer running a small team of subcontractors, after a while I needed someone to sort out the tracking for my larger clients on my behalf. In the DataCrew team I found exactly the right professional partner for that job. I asked for their help with client-side and server-side tracking, typically for webshops (custom builds and Shopify). Most importantly: when they handle the tracking for me, I am 100% confident that everything will be in order. They always kept the agreed deadlines and prices, and they work fast and precisely. Whether it was a bug fix or an extra request, they always responded quickly, and when a force majeure situation came up, I could count on them for the firefighting too. And whenever I wanted to understand exactly what was going on, they explained it willingly. I can only recommend them: a pleasant, reliable bunch both personally and professionally, people you can genuinely regard as partners.Read the testimonial - Hegedűs Gergő EV.
Agency
A very old problem of ours was solved the moment we started working together. Péter and his team are straightforward, transparent and helpful. They have become the opening pillar and the basic prerequisite of every marketing collaboration we run, and it is absolutely no accident that we have been working together ever since.Read the testimonial - Kluge Marketing
Agency
I have been working successfully with the DataCrew team for years, and they have always delivered thorough, precise and fast quality work for several of our clients.Read the testimonial - DataWize
Agency
We worked with DataCrew on a complex reporting setup that spans several platforms. The team stayed flexible and solution-focused about our needs throughout, and on the technical side they actively helped us handle our data in a system that is transparent and easy to use.Read the testimonial - DeepCC
05 — Blog
We built a B2B prospect list from free public databases, audited every domain for Meta blocking, and turned it into a LinkedIn Company List audience that pulled a 7.69% CTR.
We audited 36,717 healthcare sites running a Meta pixel and 41.2% were hit by Meta data sharing restrictions. What they block, and what actually fixes them.
Offline conversion tracking used to be enterprise-only. Not anymore. Here is how calls, forms and email deals make it into your ad platforms as real conversions.
Let us see what your setup actually measures.
After the free measurement audit you will know exactly which of your numbers you can trust, and which you cannot.
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