In IANA root
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All TLDs / .so / Is .so legit?
.so is safe to use for websites and email. Legitimacy scams are about the site, not the extension — but .so itself has a normal reputation with spam filters and browsers.
.so is a country-code TLD, and Google may geo-target it toward its home country. If your audience is global, a generic TLD is the safer SEO choice; if your audience is local, .so is an advantage.
Source: IANA root zone database, checked October 18, 2026.
Sharp and word-hacky (notion.so made it famous) — but expensive and forever explaining itself. Full pros, cons, and pricing in the complete .so review — or jump straight to where to buy .so.