.com, .fr, .io, .ai… Which Extension Should You Choose?

Updated June 2026 · ~5 min read

The extension (or TLD) is the suffix of your domain: .com, .fr, .io… It shapes trust, image, price and sometimes local SEO. Here's how to choose.

The basic rule

When in doubt, .com is the safe bet: it's the best-known and most credible extension internationally. If your business is local to one country, the matching ccTLD (e.g. .fr for France) is excellent (trust + a mild geographic signal for local SEO).

The right choice for your project

ExtensionIdeal forPriceNote
.comAny project, international$The default, most reassuring
.frFrench businesses and sitesLocal trust, good value
.ioStartups, tech, SaaS$$Tech image, but high renewal
.aiArtificial intelligence$$$Very trendy, expensive
.co.com alternative$$Short, memorable
.shop / .storeE-commerce$→$$Year-1 promo, watch the renewal
.orgNonprofits, NGOs$Connotes non-profit
.dev / .appDevelopers, apps$$HTTPS enforced (secure)

Extension and SEO: what's true (and false)

🔍 Compare your name across every extension

Type your keyword: DomaineScan shows availability and price on .com, .fr, .io, .ai, .co…

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Should you buy several extensions?

For a brand, it's often smart to secure at least the .com + your ccTLD, to stop a competitor grabbing them and to redirect to your main site. But there's no need to buy 20 extensions "just in case": focus the budget on 1 to 3 useful extensions.

In short

Choose first by your audience (international → .com, a single country → its ccTLD, tech → .io) and your renewal budget. Then check real availability and price — that's DomaineScan's job.