The grounded brain

Cortex — the AI that
can't make things up.

Cortex answers only from primary sources — cited, or it tells you it doesn't know. It's the grounded brain under everything Builda builds, which is why what you create is real, not hallucinated.

7,759 grounded expert endpoints — live and growing.

Grounded, not generative

Generic AI guesses — and in anything that matters, guessing is dangerous. Cortex is built the opposite way.

Guesses
Generative AI
Fluent, confident, and wrong often enough that you can't trust it for law, medicine, money, or specifics.
Cites
Cortex
Every claim traces to a real, primary source — or Cortex abstains and says so. No confident fabrication.

The Large Expertise Matrix

Cortex isn't one model — it's a living network of grounded experts, each answering only from primary source, spanning the domains real businesses depend on.

Government & Law
US law by state & city, IP, tax, immigration
Health & Life Sciences
medicine, pharmacology, nutrition, public health
Business & Finance
accounting, pricing, markets, filings, M&A
Engineering & Science
physics, chemistry, service manuals, how-to
Trades & Operations
labor rates, materials, suppliers, regulations
…and more, always growing
media, sports, geography, crypto & data feeds

It teaches itself

Ask anything

Even something the matrix doesn't cover yet.

Cortex researches it

It goes to primary sources and stands up a brand-new grounded expert on the spot.

Coverage compounds

That expert is now part of the matrix — so Cortex only gets more capable over time.

Why everything Builda builds is real

Your whole team runs on Cortex — Buildo, Studio, Big Dog, Penny, Fundo, Daisy, Rollo, and Exo. It's also the shared company brain: Cortex holds everything your teammates know — sales, money, customers, goals — so they act together, grounded in your real data, not a generative model's best guess.