Companies Using OpenPanel

I expected OpenPanel to be a quick profile: a young open-source tool, a small count, a clean rule. A domain counts when one of its pages loads OpenPanel's tracking script from openpanel.dev or creates the window.openpanel object the web SDK sets up. The rule held. Its count didn't. When I opened every one of the 1,564 domains in a headless browser and read which OpenPanel server each page reports to, 431 of them turned out to be loading OpenPanel for someone else or forwarding to one customer's site. This page uses the 1,133 left, from our October 2026 crawl, with 608 matched to a company.

What the rule sees

OpenPanel's script carries the account in its configuration: a client ID and, for self-hosters, an API address. That makes it one of the easier tools to census. On the 1,133 kept domains we read 740 distinct client IDs across 850 domains, and 664 of those IDs sit on a single domain, so most rows are one site with one project. The API address tells you which OpenPanel a site is on. Of 846 domains where we could read it, 536 send data to a self-hosted server and 310 to OpenPanel Cloud. Self-hosters often still take the script from OpenPanel's CDN: 596 of the 861 domains where we saw the script load fetched it from openpanel.dev.

Sales signal: treat this as two lists. Cloud sites pay OpenPanel AB. Self-hosted sites pay nobody for analytics and run the servers themselves, which makes them prospects for hosting and DevOps tools more than for analytics seats.

What we removed, and why

The biggest cut was an injected script. 153 domains carry a tag from designerlink.su that, as far as we can tell, their owners never added: the same tag sits on unrelated WordPress and PrestaShop sites in many countries, loads campaign scripts into visitors' pages and sends every visit to one OpenPanel account at analytics.designerlink.su. 85 of those domains were first seen in September. Mosadex, the Dutch pharmacy cooperative behind Service Apotheek, accounts for 123 more: local pharmacy domains that all forward to location pages on serviceapotheek.nl and share one OpenPanel account. That is one customer, so it appears once. Sendica, a delivery and logistics platform for online shops, loads OpenPanel from its Shopify app under its own account, so 104 stores, 44 of them on .bg domains, were reporting to Sendica rather than to themselves. Then come 44 gambling pages our title filter missed, 31 of them Neonclub casino mirrors, and 7 security trust centres hosted by Orbiq on its own account.

"We found one OpenPanel account on 153 unrelated websites. A crawl that only matches the script would have counted every one of those sites as a customer." - David Thomson, CTO at TechnologyChecker.io

Sales signal: if you bought an OpenPanel list elsewhere, check it for the designerlink.su tag. Those owners probably don't know OpenPanel is on their pages, and a pitch that mentions it will confuse them.

One operator, 73 hotels

dAirect, whose service promises hotels visibility in AI assistants, puts its tag on 73 hotel sites, and the tag gives each hotel its own OpenPanel project on dAirect's server. We kept them, because each hotel has its own project, but the choice of tool was dAirect's. They explain 58 of the 66 Italian matched companies and 41 of the 47 in Hospitality, and 35 of them are WordPress sites.

Sales signal: for those 73 hotels the decision sits with dAirect, not with the hotel manager. One conversation reaches the whole group.

No growth curve yet

The usage chart shows one point, October 2026. Our monthly totals before that included the removed domains, and they aren't a same-domain series either: the set of domains we crawl turns over each month, with dead sites dropping out and new ones added, and our detection widened over the summer. Since we began tracking OpenPanel in March 2026, 431 domains have dropped it on at least one hostname; 24 of them still load it on another. OpenPanel itself started as a side project in late 2023, so a short record is all anyone has.

Sales signal: don't sell OpenPanel's footprint as a trend yet. Re-check the clean count over the next two crawls first.

Who the customers are

65.98% of matched companies with a known size have 1 to 10 employees and 21.2% have 11 to 50. That is closer to PostHog's shape (61.99% at 1 to 10) than to Mixpanel's (48.18%). 36.92% were founded in the 2020s, against 21.49% for Mixpanel and 8.79% for Woopra. Software Development (11.23%) and IT services (10.14%) lead the industries. The larger names run OpenPanel on one property: New Zealand's Ministry of Education on its workforce site, Top Employers Institute on its demo platform. OpenPanel's About page names Midday among its users, and Midday's site loads it from OpenPanel Cloud.

Sales signal: these are technical founders and small product teams. Lead with documentation, a self-hosting path and a price per event.

Where they are

The United States leads with 123 matched companies, followed by Italy (66, mostly dAirect's hotels), Germany (52), the United Kingdom (34) and France (25). Eight of the 15 countries in the chart are in Europe, and Sweden, where OpenPanel AB is based, has 13 matched companies, level with Australia. Some self-hosted servers are shared: one at exabyte.hr carries the Croatian dailies Slobodna Dalmacija and Jutarnji list, and one at analytics.lottus.com carries two Mexican universities.

Sales signal: look for the shared servers. One self-hosted instance holding five or ten projects is a single buyer for monitoring, hosting or a managed OpenPanel offer.

Next to PostHog

63 OpenPanel domains (5.56%) also run PostHog, 13 run Mixpanel and 8 run Amplitude. None of these is a switching corridor. More than half of the domains ever seen with OpenPanel and PostHog still run both, and since March 21 moved towards PostHog while 19 moved the other way. Woopra, 9th in the table, shares no domains with OpenPanel at all.

"PostHog's 139,813 domains are about 123 for every one of OpenPanel's 1,133, yet sites move between them in about equal numbers in both directions, 21 one way and 19 the other." - David Thomson, CTO at TechnologyChecker.io

Sales signal: most OpenPanel sites run it free on their own servers, so a competing pitch has to beat free self-hosting, not a cloud invoice.

The stack around it

Google Tag Manager runs on 52.6% of OpenPanel domains and Google Analytics on 51.02%, so on about half of them OpenPanel is a second tag. The builds are modern: Next.js on 36.63%, Tailwind CSS on 52.25%, Lucide on 23.92% and Vercel on 17.83%. WordPress is on 18.98%. Shopify sits at 2.38% once the Sendica stores are out, which tells you most of the Shopify footprint we first saw was Sendica's.

Sales signal: this is a Next.js and Vercel audience. Developer tools that ship as an npm package fit better here than WordPress plugins do.

What it costs

OpenPanel's pricing page (15 October 2026) sells OpenPanel Cloud by monthly events: $2.50 for 5,000, $20 for 100,000, $90 for 1 million and $900 for 50 million, with unlimited sites, users and dashboards and a 30-day trial instead of a free tier. Self-hosting is free with unlimited events, and the code is AGPL-3.0 on GitHub.

Sales signal: a move between self-hosted and cloud shows up as a new API address in the site's configuration. Watch for it.

Key takeaways

1. 1,133 live domains after removing 431, 10th of 16 in Product Analytics with 0.38%.

2. Nearly two in three readable sites send data to a self-hosted server rather than OpenPanel Cloud: 536 of 846.

3. dAirect's hotels are 73 of the 1,133, and the only operator network left in the count.

4. A small, young, technical base: 65.98% have ten or fewer staff and 36.92% were founded in the 2020s.

5. PostHog runs beside it on 5.56% of domains, with no sign of switching either way.

How to use this list

Split it by API destination first, then dedupe by account: Lardi-Trans alone has 10 country domains on one account. For the full list of 1,133 OpenPanel domains with company, size and stack data, explore TechnologyChecker.io.