Before
An AI tool that helps solo founders validate startup ideas using the Garry Tan framework
After
BAn AI tool that helps solo founders validate startup ideas using the Garry Tan framework for a narrow first customer segment, packaged as a four-week V1 with a measurable pain and a clear first channel.
Per-question score table
Who is this for, very specifically?
Needs a sharper customer, proof point, and next test.
What pain are they paying for today?
Needs a sharper customer, proof point, and next test.
Why now? What changed in the world?
Needs a sharper customer, proof point, and next test.
What's the V1 you can build in 4 weeks?
Needs a sharper customer, proof point, and next test.
How will you reach the first 100 users?
Needs a sharper customer, proof point, and next test.
What does success look like at month 6?
Needs a sharper customer, proof point, and next test.
Homework
Three concrete next steps before you run the next session.
- 1Interview 5 people in the exact customer segment and write down the painful workflow in their words.
- 2Build a four-week V1 outline that solves only the highest-friction step.
- 3Send one concise outreach message to 20 likely first users and measure replies.
What founders say about gstack
“gstack's forcing questions are sharper than most advisors I have paid for.”
@founder_a
“Used this to pressure-test our YC application. We got in.”
@yc_alum_b
“58K GitHub stars for a reason. The framework is legit.”
@indie_dev_c
“It saved me from building the wrong thing. Twice.”
@pm_dana
Your next step
Apply to YC
- 1.5% acceptance rate
- 3 to 6 months until the next batch
- One idea reviewed
- Weeks to hear back
Go Pro
- Start today, no waiting
- 10 idea evals every month
- Full results in 5 minutes
- Private sessions and history
$19 / month
Applying to YC is still worth it. Use Pro to sharpen the idea before you do.
Go Pro
$19/month for 10 Full Sessions, private results, session history, and homework follow-up emails.
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Research this idea →
5-axis market analysis in Garry's voice
Brainstorm variations →
6-angle idea expansion