Where .site fits, and how it differs from .online
The two extensions share a registry and a lifecycle, and they suit different purchases. .online completes a phrase about a business that operates without a shop front. .site describes a single web property, which is why it works for a campaign page, a portfolio, a documentation site or a client build that needs its own address rather than a folder on someone else's domain. If you are naming the company, look elsewhere; if you are naming a page, this is the more accurate word.
The practical arguments are length and availability. Four characters keep the address short enough to print on a flyer or read out on a call, and because .site has not been picked over the way three-letter extensions have, sensible two-word combinations remain free at standard rather than premium pricing. Buy it for what it says, not as a cheaper substitute for a name you actually wanted.
The registry behind it and what we do as reseller
IANA records the sponsoring organisation as Radix Technologies Inc. SEZC in the Cayman Islands. The extension was delegated to DotSite Inc. in March 2015, transferred to Radix FZC in August 2021 and to the current entity in February 2024, with technical registry operations contracted to Tucows. Radix publishes its policies openly, including a reserved names policy, a WHOIS access policy, an acceptable use and anti-abuse policy and a DNSSEC practice statement.
The anti-abuse policy is worth reading before you buy if the site will host user-generated content, because it gives the registry authority to suspend, cancel or transfer a registration for abuse, legal compliance or stability reasons, with an unsuspension request as the route back. We are an Openprovider reseller, not the registry, so we cannot override a registry suspension or a premium price category. What we do control is disclosure: registration, renewal, transfer and restore are all shown for the exact name you searched before you commit to it.