Delaware LLC name search and availability: how to check before you file (2026)

Delaware LLC naming rules

The Delaware LLC Act (8 Del. C. § 18-102) requires every Delaware LLC name to satisfy specific criteria:

• Required ending: Must contain "Limited Liability Company", "LLC", or "L.L.C." The ending must appear at the end of the name and not be hidden in a stylized abbreviation.
• Distinguishability: Must be distinguishable from every other entity registered in Delaware. LLCs, Corporations, partnerships, statutory trusts, and foreign-qualified entities all count toward the distinguishability check.
• Permitted characters: Letters of the English alphabet, Arabic and Roman numerals, and certain punctuation (apostrophes, hyphens, ampersands). The name cannot contain characters or symbols not on the Division of Corporations's permitted list.
• Restricted words: Cannot contain "Bank", "Trust", "Insurance", or similar regulated terms without specific approval from the relevant Delaware regulatory authority.
• Government-suggestive words: Cannot imply a government affiliation ("Federal", "State", "Treasury", "Reserve") unless the entity has a legitimate basis for the implication.
• Length: No statutory limit on name length, but practical considerations (registered agent forms, bank-account fields, IRS Form SS-4 fields) suggest keeping names under 80 characters.

How to check availability on corp.delaware.gov

Delaware's Division of Corporations maintains a free public name search at icis.corp.delaware.gov. The search runs against the live entity registry and returns immediate results.

Procedure:

1. Go to icis.corp.delaware.gov and select "Entity Search".
2. Enter the proposed name without the LLC ending. The search engine adds the ending automatically when matching.
3. Review results. A "no records found" result means the name is available for filing. A "results found" result means a substantially similar name is taken and your application may be rejected on distinguishability grounds.
4. If the result is ambiguous (similar but not identical names), check the entity status. Cancelled or void entities sometimes free up names, but rules vary by entity type and time since cancellation.
5. Save a screenshot of the "no records found" result with timestamp. You will reference it on the Certificate of Formation.

Our free name availability tool wraps the Delaware database search and adds a parallel USPTO trademark check, which is the missing piece in the official Delaware search.

The distinguishability standard: stricter than it looks

Delaware's distinguishability standard is strict in ways that surprise first-time applicants:

• "Acme Holdings LLC" and "Acme Holding LLC" are not distinguishable (singular vs plural is not enough).
• "Acme LLC" and "Acme Inc." are not distinguishable (the entity-type ending is not part of the distinguishability comparison).
• "Acme LLC" and "The Acme LLC" are not distinguishable (articles like "The" are usually ignored).
• "Acme LLC" and "A C M E LLC" may not be distinguishable (spacing variations within a word are ignored).
• Adding a generic geographic term ("Acme Delaware LLC") usually does not help because Delaware is the state of formation by default and adds no semantic distinction.

Reliable patterns for distinguishing from an existing name:

• Add a meaningful business descriptor: "Acme Holdings LLC" → "Acme Logistics Holdings LLC".
• Add an industry word: "Acme LLC" → "Acme Software LLC".
• Change one significant word: "Acme Holdings LLC" → "Acme Group LLC".
• For brand-critical names, consider a different name entirely. If your top choice is unavailable, the conflict is usually a strong signal that other businesses see value in the same name.

USPTO trademark search

Federal trademark rights are governed by the Lanham Act and administered by the US Patent and Trademark Office (USPTO). Federal trademark protection extends nationwide, which means a name that is unused in Delaware can still infringe a federal trademark held by a company in another state. The USPTO TESS database is the free public search tool.

Categories of trademark risk:

• Identical mark in same class: The most direct conflict. A registered trademark for "Acme" in software (Class 9) blocks new trademark registration of "Acme" in software.
• Similar mark in same or related class: The likelihood-of-confusion analysis. "Acme" and "Ackme" or "Acmee" in the same industry may infringe.
• Famous-mark dilution: Famous trademarks (Coca-Cola, Google, Nike) get protection across all classes, not just their original industry.
• Common-law trademarks: Unregistered but used marks can still create infringement liability in the geographic area where they are used. A Google search and an industry-specific check can surface these.

Practical clearance for a non-resident founder building a bootstrap business:

• Search TESS for the exact name and minor variations.
• Search Google for the name + your industry keywords.
• Check the leading marketplaces in your industry (Amazon for products, App Store for apps, etc.) for existing brands using the same name.
• For names that pass all three checks, the risk is low. For names that produce hits, decide whether the existing mark is in a different enough industry to coexist or whether you should pick a different name.

Reserving a name in Delaware

If you want to lock in a name before filing the Certificate of Formation, Delaware allows reservation for 120 days for a $75 state fee. Reservation prevents anyone else from registering an identical or substantially similar name during the reservation period.

Reservation procedure:

1. File a Name Reservation form with the Delaware Division of Corporations.
2. Pay the $75 state fee.
3. The reservation is granted within 1-3 business days.
4. The 120-day clock runs from the reservation date.
5. You can file the Certificate of Formation any time during the 120 days; the name is held for you.

Most founders skip reservation and file the Certificate of Formation directly, which costs $110 and creates the LLC in the same step. Reservation makes sense if you are building a brand and need to settle on the name before you are ready to form (e.g., while you finalize partnership terms, complete trademark searches, or coordinate with co-founders in different time zones).

Common name rejection reasons

Delaware rejects Certificate of Formation applications when the name fails the statutory requirements. Common rejection categories:

• Substantially similar to an existing entity in Delaware. The most frequent rejection. Fix: change a meaningful word in the name or add a substantive descriptor.
• Contains a regulated word (Bank, Trust, Insurance) without separate approval. Fix: remove the regulated word or obtain the relevant Delaware regulatory authorization first.
• Missing required LLC or L.L.C. ending. Fix: add the ending.
• Implies government affiliation. Fix: change the offending word or be prepared to explain a legitimate basis.
• Contains profanity or otherwise prohibited content. Fix: change the name.
• Uses prohibited characters or formatting. Fix: use only permitted English letters, numerals, and punctuation.
• Name is too similar to a name that is currently reserved but not yet registered. Fix: choose a different name; reservations are checked the same way as active entities.

Delewarellc's formation process catches most of these before filing. We pre-check the proposed name against the Delaware database and the USPTO trademark database during Days 1-2 of the timeline, and we flag any concerns before we file the Certificate. If the proposed name is rejected by Delaware, we coordinate a replacement at no additional charge.

Naming your LLC for branding, not just availability

Availability is necessary but not sufficient. A name that clears Delaware and the USPTO can still be a weak brand choice. Practical brand considerations:

• Domain availability: Check that the .com (and .co, .io, country-code TLDs you care about) are available or affordable.
• Social-media handle availability: Check X, Instagram, LinkedIn, TikTok, and any platform where your audience lives.
• Pronunciation across languages: If you serve customers internationally, make sure the name is pronounceable and not embarrassing in your target markets' languages.
• Search-engine clarity: A name that is too generic ("Software LLC") will struggle to rank in search. A name that is too unusual may be hard to remember.
• Future-proofing: A name that is too narrowly product-specific may not fit if your product line expands. "Acme T-Shirts LLC" ages worse than "Acme Apparel LLC".
• Trademark strength: Inventive or arbitrary marks (Kodak, Apple-for-computers) get stronger trademark protection than descriptive marks (Best Software). If you plan to invest in branding, an inventive name protects the investment better.

What if your top name is taken?

Three paths forward:

• Modify the name. Add a meaningful word that makes it distinguishable in Delaware and addresses any USPTO conflict. "Acme LLC" taken? "Acme Logistics LLC", "Acme Software LLC", "Acme Studio LLC", "Acme Group LLC".
• Form under a different name and operate as a DBA. File the LLC under the available name, then register a "doing business as" (DBA, also called a fictitious name or trade name) for the brand name you actually want to use. The DBA is registered at the state or county level, not in Delaware. This adds operational complexity.
• Acquire the conflicting entity. If the existing Delaware entity is dormant or unused, you may be able to acquire it or buy its name. This is uncommon and usually not worth the friction; pick a different name.

What Delewarellc does on naming

During Days 1-2 of formation, we run the proposed name through Delaware's database, USPTO TESS, and a general Google search. If the name is clean across all three, we proceed to file the Certificate. If there are concerns, we surface them on WhatsApp before filing and coordinate a replacement.

For founders who want help with the brand-strategy side of naming (not just availability), we can refer to brand consultants in our partner network. The naming-as-brand- strategy work is separate from the legal-availability work; Delewarellc handles the legal-availability work as part of the formation bundle and refers out for the brand-strategy work.