Ship a prototype before the spec doc.
Test ideas with real users in hours, not sprints. No design ticket, no engineering pull, no slide deck.
- < 1 hr
- Idea → prototype
- 10×
- Prototypes per quarter
- 0 until validation
- Engineer involvement
Engineering says 'next quarter.'
You need a validated answer this week. The roadmap doesn't move just because your hypothesis is hot.
“I used to ship one prototype per quarter because eng capacity was scarce. With braincell I ship one every Friday. The shape of my PRDs has completely changed.”
Figma is a still image.
Click-through prototypes lie. Real flow exposes real friction. braincell gives you a working URL.
Spec docs are written from guesses.
Write the spec after the prototype, not before. Numbers from real users beat opinions in a Notion doc.
Every capability your buyer asks for.
From doc to URL in 60 minutes
Paste your PRD into the prompt. The agent stands up a working flow before lunch.
Real telemetry
PostHog, Vercel Analytics, custom events. Test the funnel you actually care about.
Share with users in one click
Public *.vercel.app or password-gated. Embed in your discovery survey, ship cohort tests overnight.
Snapshots = perfect A/B history
Variant A and variant B as separate snapshots. Roll back, fork, compare side-by-side.
Common questions.
Reach out at sales@braincell.sh for anything beyond this list.
The output is real working code, not a mock. Engineers can clone the project and continue from where the prototype left off, no rewrite required.
Ready when you are.
Test ideas with real users in hours, not sprints. No design ticket, no engineering pull, no slide deck.