What's the Difference Between .com, .co, and Other Domain Extensions?

Dozens of domain extensions exist now beyond the familiar .com, and picking between them can feel more complicated than it needs to be. A few practical rules cut through most of it.

.com is still the default assumption

Most people, without thinking about it, type .com when guessing a business's website. If it's available for your business name, it's usually the safest, most frictionless choice — nobody has to remember anything unusual.

When an alternative makes sense

If the exact .com is already taken, a close alternative — .co, a country-specific extension that matches where you operate, or an industry-relevant one — can still work well, especially if it's short and easy to say out loud.

What to avoid

Anything that requires explaining or spelling out over the phone is a real cost. If you find yourself having to say "that's dot, C, O, not dot com" every time you give someone your website, that friction adds up across every single interaction.

Does it affect SEO?

Not meaningfully on its own — search engines don't rank .com above other extensions by default. What matters far more is the content and structure on the site itself, covered in what actually drives local search rankings. The extension is mostly a memorability and trust decision, not a ranking one.