At Realtime Register, we depend on third-party services (sub-processors) for our day to day operations:
Google Cloud Platform (Germany) for search backend functions
Jira/Atlassian (Australia), a ticketing system used by our developers
Gitlab (used by our developers)
Acronis (we need to make backups for various reasons)
New Relic (testing, performance tracking)
Cyso Managed Hosting (Netherlands), taking care of our Network needs
Microsoft, our employees use Office 365 and Power BI
Slack, our team uses this for internal communication for day to day operations
Help Scout, a ticketing system for our support team and customers
Pipedrive, a CRM and Pipeline-Management Software (no domain data processing)
Brevo, E-Mail & SMS Marketing, CRM & Automation Software (no domain data processing)
There are a few ccTLDs that are not used much that are registered through colleague subcontractors:
INWX GmbH & Co. KG., Germany
BRS Media Inc., USA
Gransy s.r.o., Czech Republic