A registrar comparison framework focused on renewal pricing, DNS, security, portability and operational control.
A cheap first year is useful only if the renewal economics remain acceptable. Compare multi-year cost and transfer fees before building a large domain portfolio.
Look for two-factor authentication, registry lock options for valuable domains, DNSSEC support, account recovery controls, auditability and strong separation between registrar and website credentials.
Fast, resilient DNS, API access, automation support and integration with the rest of your infrastructure can matter more than a polished storefront.
You should be able to unlock and transfer domains when eligible. Avoid operational designs that make your domain dependent on a single site builder or hosting vendor.