The Best-Named Startup in YC's Spring 2026 Batch

Plan0 AI is the best-named startup in Y Combinator's Spring 2026 batch, according to BrandScreen's full screening of every company in the cohort. We ran each name through the same checks a founder would run before committing to a brand: USPTO trademarks, domain availability, state business entities, and search competition.

The winner: Plan0 AI

Plan0 AI (plan0.ai) turns architectural plans into construction cost estimates. The name is a coined blend — "plan" plus zero — that's short, spellable, two syllables, and instantly evocative of what the company does.

What the screen found:

• Zero exact live trademark matches on the USPTO register
• Delaware entity search: completely clear
• They own the entire first page of Google for their exact name

That last point is what an ownable name looks like. "Plan0" had almost no search footprint before the company claimed it. Today, every top result is theirs.

Why "only" 73/100?

Plan0 scored 73 on our Brand Score — and the reason is the best part. A BrandScreen report measures a name as if you were claiming it today. Plan0's own success is now the biggest obstacle: their domain is taken (by them), and the top search results are occupied (by them).

When your own brand is your only real conflict, the name did exactly what a great name is supposed to do.

See the full live Plan0 report →

Honorable mentions

A few other names from the batch that screened clean on our first-pass check — trademark, domain, and Delaware entity:

• Plan0 AI
• Prototyping.io
• Shotwell.ai
• Tday.com
• 9 Mothers Corporation
• Advanced Metal Research
• Apollo Atomics Inc

How we scored the batch

Every name was run through BrandScreen's Tier-1 screen: exact-match USPTO trademark check, domain availability across five TLDs, Delaware entity search, and Google search competition — the same signals behind every free BrandScreen report.

Naming a startup? Screen your name before you build it →