Glossary
Registry vs registrar: what's the difference?
A registry operates a top-level domain and maintains its master database; a registrar sells domain registrations in that TLD to the public.
A domain registry is the organisation that operates a top-level domain — it maintains the authoritative database of every name in that TLD and runs the infrastructure that makes them resolve. domains.Best is the registry for .best.
A registrar is a company accredited to sell registrations to the public and manage them on registrants' behalf — handling billing, renewals, and support. You buy a .best domain from a registrar, not from the registry directly.