.dev vs .io: which domain fits a developer product?
.dev is explicitly developer-focused and requires HTTPS, while .io is broadly recognized across technical startups. The label, audience, and cost usually matter more than choosing by convention.
NameFinder can generate and verify names across both extensions while checking GitHub and npm identifiers and estimated registrar pricing.
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
What is the main difference between .dev and .io?
.dev explicitly signals development and is HSTS-preloaded. .io has wider startup recognition and is not limited to developer products.
Which one costs less?
Pricing changes by registrar and promotion. Compare registration and renewal estimates for the exact extension, then confirm the domain at checkout.