captcha.eu is a GDPR-positioned CAPTCHA service operated by Captcha GmbH from Muthgasse in Vienna, sold to businesses with ready-made plugins for the common CMS platforms and a documented API. The product itself is a straightforward challenge-response service with an invisible mode, priced by request volume, and the marketing is squarely aimed at European operators who want to remove Google reCAPTCHA from their forms.
The ownership is the part worth reading carefully, and the vendor is upfront about it. The end-user privacy policy names Krone Multimedia GesmbH & Co KG as the commissioned processor for technical development, support, marketing and sales, and the service-user policy adds Mediaprint Zeitungs- und Zeitschriftenverlag for accounting, both companies in the Kronen Zeitung group and both at Vienna addresses, with Captcha GmbH sharing Krone Multimedia's building. So this is a product of Austria's largest newspaper group rather than an independent vendor. That is EU ownership by any measure, and it also means the operator is a substantial company rather than a two-person project.
Disclosure is above average for this category: alongside the two group companies the policies name Stripe Payments Europe Ltd. (Ireland) for billing, Google Ireland Limited for web analytics and advertising performance measurement, and Didomi SAS in Paris as consent management platform. What sits awkwardly against the domain name is the infrastructure. The site is served from Amazon S3 behind Amazon CloudFront, corporate mail runs on Microsoft 365, and the vendor's own consent banner declares five advertising partners with profiling purposes. None of that necessarily touches the verification path, but a company whose pitch is getting Google off your forms is itself measuring with Google and delivering from a US CDN: Material. There is no public DPA. Pricing is Basic at €9, Growth at 35.90 EUR and Advanced at 179.90 EUR per month, with a free trial and roughly 17% off on annual billing.