Domains and Trademarks: What Startup Founders Actually Need to Know

A practical guide to checking domain availability, choosing TLDs, and handling trademarks before you commit to a startup name.

Don't Fall in Love With a Name You Can't Own

You've found the perfect startup name. It's short, brandable, and your co-founder didn't veto it. Before you register the LLC and order the stickers, there are two things that can kill it: domain availability and trademark conflicts. Here's what you actually need to check, in what order, and when to walk away.

The .com Question

Every good single-word .com was registered before you graduated high school. That's the reality. But the answer isn't "give up on .com" — it's "be strategic about it."

Do
  • Check exact-match .com first — it's always the ideal
  • Consider prefix patterns: get[name].com, try[name].com, use[name].com
  • Use .io for developer tools — it's fully normalized in tech
  • Use .ai if you're genuinely an AI company (not just using AI features)
  • Budget $1K-$10K for domain acquisition if the name is strong enough
Don't
  • Use hyphens — your-startup.com screams "the real one was taken"
  • Add numbers — startup2.com is confusing verbally
  • Pick obscure TLDs nobody recognizes (.xyz, .club, .biz)
  • Assume a parked domain is "taken" — many are for sale at reasonable prices
  • Let domain availability dictate your name choice entirely

The hierarchy, roughly: exactname.com > getexactname.com > exactname.io > exactname.ai > exactname.co > everything else. There are exceptions — if your entire audience is developers, .io might actually be better than a .com with a prefix. But for consumer products and anything investor-facing, .com still carries the most credibility.

Alternative TLDs That Actually Work

Not all non-.com domains are created equal. Some TLDs have earned legitimacy in specific niches:

.io Developer tools — Replit, Socket.io
.ai AI companies — Perplexity.ai, Stability.ai
.co Startups broadly — Angel.co, Vine.co
.app Mobile apps — Cash.app, Notion.app
.dev Developer platforms — Web.dev, Glitch.dev
.xyz Wildcard — Alphabet uses abc.xyz, but it's risky for most

One thing to watch: .io technically belongs to the British Indian Ocean Territory, and there's been periodic talk about the domain being phased out as the territory's political status changes. It probably won't happen anytime soon, but it's worth knowing if you're building a decade-long brand on a .io domain.

How to Actually Check Domain Availability

Don't just type the name into GoDaddy and call it done. Here's a more thorough approach:

  1. WHOIS lookup first: Use whois.domaintools.com or the command-line whois tool. This tells you who owns the domain, when it was registered, and when it expires. A domain registered in 2003 and actively renewed is probably not for sale cheap.
  2. Check the actual website: Visit the domain. Is it a parked page with ads? That's often a domain speculator — they'll sell, just at a markup. Is it an active business? That's a harder conversation.
  3. Check aftermarket prices: Dan.com, Sedo, and GoDaddy Auctions list domains for sale with asking prices. This gives you a realistic sense of cost.
  4. Check social handles simultaneously: A name with a perfect .com but no available social handles is still a problem. Check Instagram, X, TikTok, and LinkedIn before getting attached.

Trademark Basics for Founders

Trademarks are the thing most first-time founders skip until a lawyer sends a cease-and-desist. Here's the minimum you need to know.

A trademark protects a name (or logo, or slogan) within a specific category of goods or services. "Delta" is trademarked by an airline, a faucet company, and a dental insurance provider — all simultaneously, because they're in different categories. This means your startup name doesn't need to be globally unique. It needs to be unique in your space.

  • Common law rights exist: In the US, you get basic trademark protection just by using a name in commerce, even without registration. But registration is much stronger — it gives you nationwide priority and the ability to sue in federal court.
  • Registration costs $250-$350 per class: You can file directly with the USPTO using TEAS (Trademark Electronic Application System). It's not as scary as it sounds, though a trademark attorney ($500-$1,500 for a basic filing) catches problems you'll miss.
  • "Confusingly similar" is the standard: You don't need an exact match to have a conflict. "Slak" for a messaging app would absolutely conflict with Slack. Trademark examiners look at sound, appearance, meaning, and the relatedness of the goods.
  • Descriptive names are hard to trademark: "Fast Delivery App" is nearly impossible to register because it describes the service. This is another reason coined and abstract names are popular — they're inherently more trademarkable.

The Trademark Search Process

Before committing to a name, run through these steps:

  1. USPTO TESS search: Free at tess2.uspto.gov. Search for your exact name and phonetic variations. Check both live and dead registrations — a dead trademark might still have common law rights if the business is still operating.
  2. Google it thoroughly: Search the name, the name + your industry, and the name + "startup." Look at the first 3-4 pages of results. If an active company shows up in your space, it's a conflict regardless of formal trademark status.
  3. App store search: Check the Apple App Store and Google Play. A competing app with your name is a problem even if they haven't filed a trademark.
  4. International check: If you're planning to operate outside the US, search TMview (European trademarks) and WIPO Global Brand Database. Trademark rights are territorial — a US registration means nothing in Europe.

If your search turns up a conflict, don't try to rationalize it. "They're a small company" or "we're in a slightly different niche" are the words people say right before getting a cease-and-desist. Pick a different name. There are always more good names.

The Pre-Launch Checklist

Once you've settled on a name that clears both domain and trademark hurdles:

  1. Register the domain immediately. Don't wait. Domains cost $10-$15 per year and someone else can grab it tomorrow.
  2. Claim social handles on every platform you might conceivably use — Instagram, X, TikTok, LinkedIn, YouTube, GitHub. They're free. Squatters are not.
  3. File a trademark application. The earlier you file, the earlier your priority date locks in. You can file based on "intent to use" even before launching.
  4. Set up Google Alerts for your name so you know if anyone else starts using it.
  5. Register the LLC or corporation with your state. This is separate from trademark registration but equally important.

If you're still in the brainstorming phase, our startup name generator creates names that are designed to be domain-friendly and trademarkable — short coined words, real-word twists, and the other patterns that make the trademark process smoother. For broader business naming beyond tech startups, the business name generator covers industries where naming conventions are different.

For app-specific naming considerations — where App Store SEO and platform guidelines add extra constraints — check out our app name generator.