Startup domain extensions: how to choose
A startup extension influences first impressions, spoken clarity, price, and potential confusion with other sites. Treat it as part of the name rather than a substitute for a strong label.
NameFinder checks candidate names across .com, .io, .ai, .app, .dev, .co, and other supported extensions with conservative availability signals.
Real RDAP Verification
Every name is verified live against official WHOIS/RDAP registries across .com, .io, .ai, .dev, and .app — no stale, cached guesses.
Multi-Namespace Handles
Check matching social handle availability across GitHub, npm, YouTube, X, and Instagram in one pass alongside your domain search.
Honest Registrar Prices
Transparent wholesale prices directly from Porkbun, Namecheap, and Cloudflare — zero affiliate price markups or registration traps.
Frequently Asked Questions
How many extensions should a startup buy?
Buy the primary domain and defensive variants only when confusion or abuse risk justifies the cost. Each additional domain creates renewal and management obligations.
Does the extension affect SEO?
Most generic extensions can rank. Search performance depends more on content, technical quality, links, relevance, and user trust than the extension alone.