nilly is a privacy-focused web analytics service from Switzerland. You add a tracking code to your website, or use the WordPress plugin, and review visitor statistics in a straightforward dashboard with real-time data. According to the provider, nilly works without cookies, so no cookie banner or consent notice is needed. The service is delivered as SaaS and requires a nilly account.
nilly is described as made and hosted in Switzerland. Switzerland is outside the EU but a member of EFTA. Through the WordPress plugin you choose Switzerland (the default) or Germany as the storage location. The sources used name no US parent company. The cookieless design limits the processing of personal data, but whether your own use complies with the GDPR still depends on your configuration and legal assessment. The sources consulted give no information on an open-source licence or self-hosting.