YC's #1 rule, enforced in your IDE

Build something people want.

Stop wasting months and money on unvalidated features. Your AI checks for evidence before writing code.

Free to start
Works withCursorWindsurf

Your AI checks before building

Every feature request goes through validation. No evidence? Your AI asks the hard questions first.

  • Checks validation status automatically
  • Asks "who requested this?" before coding
  • Learns as you build and talk to users
openfnder
// You ask to build a feature
Add social sharing
// AI checks openfnder
Checking validation...
Not validated
No evidence users want this.
Ask user:"Who asked for this?"

How it works

01

Quick setup

Define your problem and users. Takes 2 minutes.

02

Connect your IDE

One click to add openfnder to Cursor or Windsurf.

03

Build with evidence

Your AI validates before coding. Learns as you go.

"The most important thing is to build something people want. If you don't do that, nothing else matters."

Paul Graham, Y Combinator

2 min
setup
1 click
to connect
$0
to start

Stop wasting time on the wrong product

Connect your IDE. Validate before you ship.