Doctor Market Fit
@iwantproductmarketfit.skystack.xyz
No-bullshit tactics and frameworks for early-stage startups, by a PhD on product-market fit.
This is an automated Substack Account of https://iwantproductmarketfit.substack.com
Discover more/Create at: @skystack.xyz
This is an automated Substack Account of https://iwantproductmarketfit.substack.com
Discover more/Create at: @skystack.xyz
Stop trying to be a visionary: you can't create demand • Even Steve Jobs didn't create it for the iPhone
Stop trying to be a visionary: you can't create demand
Even Steve Jobs didn't create it for the iPhone
www.doctormarket.fit
February 12, 2026 at 1:39 PM
Stop trying to be a visionary: you can't create demand • Even Steve Jobs didn't create it for the iPhone
Measure Product-Market Fit with the PMFit Scale • Version 4 just dropped, including Go To Market Signals
Measure Product-Market Fit with the PMFit Scale
Version 4 just dropped, including Go To Market Signals
www.doctormarket.fit
February 4, 2026 at 1:37 PM
Measure Product-Market Fit with the PMFit Scale • Version 4 just dropped, including Go To Market Signals
Make your MVP truly minimal with this framework • Validate your product-market fit even faster
Make your MVP truly minimal with this framework
Validate your product-market fit even faster
www.doctormarket.fit
January 28, 2026 at 10:38 AM
Make your MVP truly minimal with this framework • Validate your product-market fit even faster
Startup failure: It's never about timing • Stop blaming the market for your mistakes
Startup failure: It's never about timing
Stop blaming the market for your mistakes
www.doctormarket.fit
January 10, 2026 at 7:40 PM
Startup failure: It's never about timing • Stop blaming the market for your mistakes
I worked with 100+ founders last year. Here’s what the top performers did differently. • Reflections on 2025 to empower your 2026
I worked with 100+ founders last year. Here’s what the top performers did differently.
Reflections on 2025 to empower your 2026
www.doctormarket.fit
January 2, 2026 at 4:40 PM
I worked with 100+ founders last year. Here’s what the top performers did differently. • Reflections on 2025 to empower your 2026
Three tips on selecting your target market • With examples from last week's mentoring
Three tips on selecting your target market
With examples from last week's mentoring
www.doctormarket.fit
December 18, 2025 at 1:40 PM
Three tips on selecting your target market • With examples from last week's mentoring
Why you can't activate a passive market • How latent problems block startup success
Why you can't activate a passive market
How latent problems block startup success
www.doctormarket.fit
December 12, 2025 at 1:40 PM
Why you can't activate a passive market • How latent problems block startup success
Ultimate Guide to Interviews #4: Don't just ask for problems • How to uncover the hidden goals that actually drive sales
Ultimate Guide to Interviews #4: Don't just ask for problems
How to uncover the hidden goals that actually drive sales
www.doctormarket.fit
December 4, 2025 at 10:42 AM
Ultimate Guide to Interviews #4: Don't just ask for problems • How to uncover the hidden goals that actually drive sales
Doubt is the goldmine • Embrace uncertainty to increase momentum
Doubt is the goldmine
Embrace uncertainty to increase momentum
www.doctormarket.fit
November 26, 2025 at 4:42 PM
Doubt is the goldmine • Embrace uncertainty to increase momentum
Timing product launches, when to target corporate clients, and getting quality feedback • Three breakdowns of advice I gave last week
Timing product launches, when to target corporate clients, and getting quality feedback
Three breakdowns of advice I gave last week
www.doctormarket.fit
November 24, 2025 at 11:24 AM
Timing product launches, when to target corporate clients, and getting quality feedback • Three breakdowns of advice I gave last week
Why potential customers won't switch to your solution • Explained in two simple infographics, and what to do instead
Why potential customers won't switch to your solution
Explained in two simple infographics, and what to do instead
www.doctormarket.fit
November 24, 2025 at 11:24 AM
Why potential customers won't switch to your solution • Explained in two simple infographics, and what to do instead
5 reasons AI startups fail to find product-market fit • Lessons from working founders in the AI gold rush
5 reasons AI startups fail to find product-market fit
Lessons from working founders in the AI gold rush
www.doctormarket.fit
November 24, 2025 at 11:24 AM
5 reasons AI startups fail to find product-market fit • Lessons from working founders in the AI gold rush
Ultimate Guide to Interviews #3: Framing the interview • How to manage expectations in outreach and the interview itself
Ultimate Guide to Interviews #3: Framing the interview
How to manage expectations in outreach and the interview itself
www.doctormarket.fit
November 24, 2025 at 11:24 AM
Ultimate Guide to Interviews #3: Framing the interview • How to manage expectations in outreach and the interview itself
Ultimate Guide to Interviews #2: Structuring and starting the interview • How to keep your baby in your bag?
Ultimate Guide to Interviews #2: Structuring and starting the interview
How to keep your baby in your bag?
www.doctormarket.fit
November 24, 2025 at 11:24 AM
Ultimate Guide to Interviews #2: Structuring and starting the interview • How to keep your baby in your bag?
Ultimate Guide to Interviews #1: Build a customer theory • Take off your founder hat, put on your anthropologist hat
Ultimate Guide to Interviews #1: Build a customer theory
Take off your founder hat, put on your anthropologist hat
www.doctormarket.fit
November 24, 2025 at 11:24 AM
Ultimate Guide to Interviews #1: Build a customer theory • Take off your founder hat, put on your anthropologist hat
To vibecode or not to vibecode? • How to test your idea before you waste weeks vibecoding
To vibecode or not to vibecode?
How to test your idea before you waste weeks vibecoding
www.doctormarket.fit
November 24, 2025 at 11:24 AM
To vibecode or not to vibecode? • How to test your idea before you waste weeks vibecoding
Why I’m against obsessing over measuring too early • Know the difference between design and validation
Why I’m against obsessing over measuring too early
Know the difference between design and validation
www.doctormarket.fit
November 24, 2025 at 11:24 AM
Why I’m against obsessing over measuring too early • Know the difference between design and validation
Here’s what B2B sales taught me about B2B sales • 12 quick tips and tactics.
Here’s what B2B sales taught me about B2B sales
12 quick tips and tactics.
www.doctormarket.fit
November 24, 2025 at 11:24 AM
Here’s what B2B sales taught me about B2B sales • 12 quick tips and tactics.
The Problem Impact Matrix • Are you chasing the right problem?
The Problem Impact Matrix
Are you chasing the right problem?
www.doctormarket.fit
November 24, 2025 at 11:24 AM
The Problem Impact Matrix • Are you chasing the right problem?
Ultimate Guide: Revenue Models • 5 simple steps and a handy cheatsheet
Ultimate Guide: Revenue Models
5 simple steps and a handy cheatsheet
www.doctormarket.fit
November 24, 2025 at 11:24 AM
Ultimate Guide: Revenue Models • 5 simple steps and a handy cheatsheet
The four hurdles of manual outreach • Tactics to improve your outbound messaging
The four hurdles of manual outreach
Tactics to improve your outbound messaging
www.doctormarket.fit
November 24, 2025 at 11:24 AM
The four hurdles of manual outreach • Tactics to improve your outbound messaging
Check how close you are to PM-fit with The Startup Thermometer • The simplest framework for visualising product-market fit
Check how close you are to PM-fit with The Startup Thermometer
The simplest framework for visualising product-market fit
www.doctormarket.fit
November 24, 2025 at 11:24 AM
Check how close you are to PM-fit with The Startup Thermometer • The simplest framework for visualising product-market fit
Does your landing page pass the five-second rule? • One quick test to see if customers “get it.”
Does your landing page pass the five-second rule?
One quick test to see if customers “get it.”
www.doctormarket.fit
November 24, 2025 at 11:24 AM
Does your landing page pass the five-second rule? • One quick test to see if customers “get it.”
No, AI didn't kill product-market fit • Detecting bullshit on five claims about AI and PM-fit
No, AI didn't kill product-market fit
Detecting bullshit on five claims about AI and PM-fit
www.doctormarket.fit
November 24, 2025 at 11:24 AM
No, AI didn't kill product-market fit • Detecting bullshit on five claims about AI and PM-fit
Your sales pitch might be holding back your growth • How this founder changed one thing to unlock traction
Your sales pitch might be holding back your growth
How this founder changed one thing to unlock traction
www.doctormarket.fit
November 24, 2025 at 11:24 AM
Your sales pitch might be holding back your growth • How this founder changed one thing to unlock traction