Bestie-proof your idea before you build more.
Turn one customer assumption into a repeatable interview sequence, practice the hard follow-ups, then log what real customers actually do—not what they politely predict.
Step 1
Share the situation
Step 2
Get a plan
Step 3
Keep going
Start here
Which assumption needs customer truth this week?
Your Plan
One clear move for today and tomorrow.
Goal
Test one customer assumption with real behavioral evidence
Blocker
Friendly conversation keeps turning into validation or pitching
Today
Choose one relevant customer and write a neutral last-time question before discussing the idea.
Tomorrow
Practice the opening and one uncomfortable follow-up, then book the first real conversation.
My Customer Truth Sprint
One assumption, one relevant customer, one real conversation, and one evidence-based decision.
Assumption
Test one customer assumption with real behavioral evidence
Interview risk
Friendly conversation keeps turning into validation or pitching
First move
Choose one relevant customer and write a neutral last-time question before discussing the idea.
Next checkpoint
Practice the opening and one uncomfortable follow-up, then book the first real conversation.
Designed to be public-safe: it shares the plan shape, not private coaching history.
7-Day Customer Truth Sprint
One week from assumption to field evidence.
Day 1
Name the risky assumption
Write one claim that could change the product decision if it is wrong.
Day 2
Choose relevant customers
Recruit people with recent, direct experience of the workflow—not friends evaluating the idea.
Day 3
Build the script
Use a consistent sequence: recent event, steps, workaround, consequence, cost, and decision process.
Day 4
Practice and retry
Rehearse one realistic interview and improve the moment where you pitch, lead, or accept vagueness.
Day 5
Run the real interview
Listen for specific behavior and contradictions. Do not count the simulation as market evidence.
Day 6
Log and compare
Capture exact facts, a disconfirming signal, and the next commitment without turning one quote into a trend.
Day 7
Make the next decision
Choose the smallest follow-up that can strengthen, weaken, or refine the assumption.
Keep Going
Choose how far to take this after the first result.
Free
Diagnose and plan
Take The Bestie Test, create the seven-day plan, and build an interview script.
Create account
Keep your evidence connected
Save the plan, interview notes, patterns, and next move so the next session does not restart from zero.
Save planPremium
Practice and keep the context with Premium
Premium unlocks Customer Interview Gym, saved context, and monthly AI credits. The complete Founder Coaching Program is a separate 12-month add-on, with lower member pricing for Premium subscribers.
Next Steps
Go deeper when you are ready.
Build the evidence-first script
Choose neutral questions about a recent event, current workaround, consequence, cost, and decision process.
Practice the hard follow-up
Run a realistic customer interview, get rubric-based feedback, and retry the moment that produced weak evidence.
Review what the evidence changes
Separate repeated behavior from compliments, then choose what to test, narrow, build, sell, or stop next.
The problem behind this step
Continue from this step into the full decision.
Get the first 10 customers
Build a named prospect list, send the first messages, run customer calls, and record evidence stronger than praise.
Open topic guideValidate a business idea
Test recent buyer behavior, current workarounds, consequences, access, and a costly commitment before building more.
Open topic guide