How to pick a domain name for your application or business

Your domain name is the first thing people will see, type, and remember about your business. The hardest part is usually not what to name it — it’s deciding which extension to use and where to buy it. Here’s a quick breakdown to make the choice easier.

Understanding the common extensions

Each domain extension (the part after the dot) was originally created with a purpose in mind. Most still carry that meaning today, even if the rules around who can register them have loosened.

.com — The default for commercial businesses and the most recognized extension worldwide. If you’re building a product, a startup, or a service business, this is almost always the first choice. People assume .com when they type your name from memory.
.net — Originally meant for network infrastructure providers. Today it’s a reasonable fallback when your preferred .com is taken, though it carries less weight than it used to.
.org — Associated with non-profits, communities, and open-source projects. Use it if your work is mission-driven rather than commercial.
.app — A modern extension aimed at software and mobile apps. It’s HTTPS-only by default, which signals security. A solid pick for a product launch or a standalone app.
.io, .dev, .tech — Popular with developer tools and tech startups. Good when your audience is technical and you want the name to feel current.
Country extensions (.us, .co.uk, .de, etc.) — Use these if your business is local or regional. They build trust with customers in that country.

How to choose

A few practical rules:

Default to .com if you can get it. It’s still the safest choice for trust and recall.
Match the extension to your audience. A consumer brand should lean .com; a developer tool can comfortably use .dev or .io.
Keep it short and easy to spell. If you have to spell your domain over the phone, it’s too complicated.
Avoid hyphens and numbers. They make domains harder to remember and easier to mistype.
Check social handles too. A great domain is less useful if the matching usernames are unavailable everywhere else.

Where to search and register

To check availability, Cloudflare’s domain search is a simple, fast tool. You can type in a name and see what’s available across different extensions in one view.

For the actual registration, we recommend Cloudflare Registrar. They sell domains at cost — no markup, no upsells — and renewals stay at the same price every year. DNS management is included and straightforward, which matters more than people expect once you start pointing the domain at real services.

Pick a name you’d be proud to say out loud, register it, and move on to building. The name matters less than what you do with it.