The four different questions
- State registration: can I register a company or DBA under this name in my state or country?
- Domain: is the domain I want currently unregistered, and at what price?
- Trademark: does using this name for my goods or services create legal risk?
- Handles and namespaces: are the social handles and developer namespaces I need free?
No single tool answers all four, and any page that shows one green checkmark for the whole question is compressing facts that can each change independently. Work through them in order.
1. State and registry availability
Entity names are registered per jurisdiction. In the United States, each state's Secretary of State (or equivalent) runs its own business entity search, and most states require a new entity name to be distinguishable on the record from existing ones. The same word can be a registered LLC in Texas and free in Oregon.
Search the official registry for your state directly; the U.S. Small Business Administration keeps a plain-language overview of the process at sba.gov: choose your business name, and every state links its own entity search from its Secretary of State site. Note two things registries do not tell you: registering an entity name gives you almost no brand protection outside that registry, and a registrable entity name can still infringe someone's trademark.
NamingSignal does not check state registries. This step is yours, at the official source for your jurisdiction.
2. Domain availability
A domain check has two honest levels. Registry evidence (RDAP) tells you whether a current registration record exists; it is fast, free, and good for filtering a long list. A registrar checkout tells you whether you can actually buy the name today, at what price, and whether it is premium-priced. Only the second is a purchase decision.
Beware the most common failure mode: a lookup that errors, times out, or hits an unsupported registry is not evidence the domain is free. NamingSignal's bulk domain checker and single-name checker keep those results explicitly unknown, trust a not-found response only after the registry passes a control test against a known-registered domain, and link every result to a registrar for the final manual check.
3. Trademark research
Trademark risk is about the likelihood of confusion with existing marks for related goods and services, not exact string matches. Start with the official sources: the USPTO's trademark search at tmsearch.uspto.gov for U.S. federal registrations, and WIPO's Global Brand Database for international coverage. Search exact names, close spellings, and phonetic neighbors in the classes that match your product, and record what you find with dates.
Common-law rights complicate this further: in the U.S., unregistered marks in active commercial use carry rights too, which is why category search matters alongside database search.
What a tool can honestly do here is preliminary research. NamingSignal's finalist research surfaces exact and close namesakes with sources and gives you direct links into the official databases. It never produces clearance. Before committing to a name, have a trademark professional review it for your jurisdictions and classes.
4. Handles and developer namespaces
Check the platforms your customers will actually use, and be skeptical of any tool claiming to verify every social platform: several major platforms block automated checks, so honest results there are manual. Developer namespaces are more tractable: exact GitHub, npm, and PyPI checks are reliable, and NamingSignal runs them alongside domain checks when they match your channels. For platforms it cannot verify, it says so and gives you the link instead of guessing.
A sensible order of operations
- Generate and shortlist names against product fit first; availability cannot rescue a weak name.
- Filter the shortlist with registry-level domain checks and developer namespace checks.
- Search the state registry where you will incorporate.
- Run preliminary trademark research on one to three finalists, then professional review.
- Verify the domain at a registrar and claim the handles and namespaces the same day you decide.
What NamingSignal covers, and what it does not
Covered: name generation from a real brief, calibrated domain evidence with sources and check times, exact developer namespace checks, preliminary namesake and trademark research with links into official databases, and an exportable decision record. Not covered: state or national entity registration, legal clearance of any kind, and social platforms that block reliable automated checks. The boundary is deliberate; the steps that create legal certainty belong to official registries and professionals.