Openprovider is a Netherlands-based ICANN-accredited registrar that began as a domain reseller platform and has grown to support thousands of TLD extensions including .xxx and .adult registration. Registration of adult TLDs follows the standard membership-ID workflow required by the registry, and Openprovider's support documentation covers the process step by step. The Dutch incorporation means GDPR applies by default to customer data and WHOIS privacy handling.

The platform is reseller-oriented, offering competitive wholesale pricing on domain registrations, DNS hosting, SSL, email, and DMARC services under a single account. A well-documented API and billing-system integration module make it practical for hosting providers or agencies who need to automate domain provisioning at scale. The reseller focus does mean the UI is less streamlined than a consumer registrar, but operators who already manage portfolios will find the feature set appropriate.

A workable pick for EU-based operators or resellers who want adult TLD support alongside a broad registry catalog, all from a GDPR-native provider.