For the moments you want to practice first.

For founders and future founders. Practice the decisions ahead of you.

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The exabrain library: every skill as a cover in a grid, filtered by category.

Choose the skill to practice

See all skills

Or create your own

Create a skill

How practice works

A short explanation of what makes a claim testable, shown before the question.
See it

A few lines of context before anything is asked of you.

A question ordering validation signals from lowest to highest commitment, marked correct and worth 8.7%.
Do it

A real situation to work through. Every answer gets marked.

The explanation after answering, breaking down why each signal sits where it does.
Get feedback

Why your answer held or did not, and what it moved.

Know where you stand

A skill in exabrain: proficiency at 36.1% over 40 questions, beside a chart of how it climbed.

You don’t need a startup yet

Frequently asked questions

A practice app for founders. You pick a skill, work through real situations, and find out what held and what did not.

No. Every question puts you in a situation and marks the answer you actually gave.

It asks for your business model and your stage, then builds the situations around them. Your weakest skills come up more often.

Cold outreach, discovery calls, pricing conversations, investor questions, hiring calls, hard conversations with a co-founder.

No. Plenty of people practice before they start. Tell it where you are and it works from there.

Yes. Practicing is free, no card. Pro raises the usage limits and adds more features.

Walk in ready.

A few minutes is all it takes.

Start practicing