Office hours with Garry Tan, in 5 minutes
Pitch your startup idea, answer 6 forcing questions, walk away with a refined V1 and a grade you can post on X.
Try a free evalChoose your session type
Office Hours
6 forcing questions. Garry grades your startup idea A–F.
Start →
CEO Plan Review
Expand, selective, hold, or reduce? Clear scope verdict with next actions.
Review →
Eng Plan Review
Architecture, data flow, edge cases, and test coverage critique.
Review →
Plan Design Review
Design dimension scores (0–10) and what it takes to reach 10.
Review →
Design Consultation
Full design system: palette, typography, layout, motion, preview.
Consult →
Design Shotgun
Multiple design variants to compare before committing to one direction.
Generate →
How it works
Enter one sentence
What are you building? One sentence is enough to start.
Answer 6 forcing questions
Garry Tan's forcing questions cut through vague thinking.
Get honest pushback
Honest critique based on what YC partners actually look for.
Leave with a grade card
See your refined idea and a grade — A through F.
What people say about gstack
“Went in thinking I had a clear idea. Q3 (Why now?) made me realize I couldn't actually answer it. Spent the next week finding a real answer.”
SaaS founder
Indie hacker
“The pushback on Q1 was sharper than anything I got from friends or even an accelerator call. Grade C forced me to narrow my ICP by 80%.”
B2B builder
Solo developer
“I've read Garry Tan's office hours transcripts. The framework is identical. The Q5 acquisition channel question completely changed my go-to-market.”
Design tool founder
Product designer
“Three sessions in three weeks. My grade went from C+ to B+. The homework items were the most actionable next steps I've had from any framework.”
Consumer app builder
First-time founder
Validate your own idea with the same framework
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