5 days to test your next bet with real customers before you build the wrong thin
AI made building cheap. Figuring out what is worth building is the skill this week trains.
Founders and product teams fall into the same trap: build fast, ship something, wait for traction that never comes, then realize they solved the wrong problem for the wrong person. It happens at the idea stage. It also happens with a live product and a roadmap full of features nobody asked for. The root cause is usually process. You know you should talk to customers. Nothing is holding you to it.
In five days you run one complete validation loop inside the ProtoVibing app: sharpen a real bet (a new idea, a feature, a new segment, a pivot), define the customer you are betting on, build the right test asset, put it in front of real people, and turn the signal into a clear commit-or-iterate call.
AI agents accelerate the research, the building, and the synthesis. The customer conversations are yours to run. That part never gets automated.
Every session is live demonstration, group practice, and a public commit the cohort holds you accountable to.
What you’ll learn
Run one full validation loop in 5 days: sharpen a bet, interview real customers, and make the call. For founders and product teams.
Write one falsifiable hypothesis: a specific customer, a specific problem, and the signal that would prove you wrong.
Cut a vague idea or a crowded roadmap down to the single riskiest assumption you can actually test in a week.
Define one specific ideal customer or segment you can actually find and interview this week.
Put AI agents to work on competitive intel, simulated personas, and journey maps, then decide what matters.
Build only what your hypothesis needs: a prototype, a landing page, a survey, or an outreach sequence.
Keep it lo-fi. Nothing gets polished until the bet holds up.
Run interviews that are 80% listening. No pitching, no leading questions, no "would you use this?"
Put your test asset in front of real customers and watch for the moments that surprise or contradict you.
Turn messy interview notes into one clear signal with AI agents in the ProtoVibing app.
Make the call on evidence: iterate or commit, then seed your next loop.
Learn directly from Marc
Marc Krejci
9x founder. 7.5 years at Meta. 20+ years of shipping 0-to-1
Who this course is for
Founders and product leads with an MVP or live product who aren’t getting traction, or are deciding what to build next.
Solo technical founders who build fast but avoid customer conversations because they don't have a repeatable process for them.
Repeat founders or corporate operators going independent who want a rigorous zero-to-one validation framework they can actually run.
Prerequisites
You have a bet to test
An idea, a feature, a new segment, a pivot, or a second product. You need a hypothesis, even a rough one, that you want to pressure-test wit
You will talk to your ICP this week
You define your ICP Monday and interview live by Thursday. Have a product? Start with your current and churned users.
No engineering background required
The build tools in this sprint are made for non-technical founders. If you can describe it, you can build it.
What's included
Live sessions
Learn directly from Marc Krejci in a real-time, interactive format.
5 Daily Live Sessions
Five 60-minute sessions, one a day, Monday to Friday. Marc demos live in the ProtoVibing app, the cohort works the day's practice together, and each session ends with a commit the group tracks.
5 Daily Project Deliverables
Each day you submit a real artifact: your hypothesis, your customer definition, your test asset, your interview notes, and your synthesis. Each one is the evidence base for your next real decision.
ProtoVibing App Access
Your whole validation loop lives in the ProtoVibing app, with a curated AI stack for building and synthesizing your customer work. It is yours to keep, so you can run the loop again long after the sprint ends.
Maven Guarantee
Your purchase is backed by the Maven Guarantee.
Course syllabus
5 live sessions • 5 lessons • 7 projects
Week 1
Nov
9
Day 1 - ProtoVibing Sprint
Mon 11/94:30 PM—5:30 PM (UTC)Nov
10
Day 2 - ProtoVibing Sprint
Tue 11/104:30 PM—5:30 PM (UTC)Nov
11
Day 3 - ProtoVibing Sprint
Wed 11/114:30 PM—5:30 PM (UTC)Nov
12
Day 4 - ProtoVibing Sprint
Thu 11/124:30 PM—5:30 PM (UTC)Nov
13
Day 5 - ProtoVibing Sprint
Fri 11/134:30 PM—5:30 PM (UTC)
Monday – Idea
Tuesday – Plan
Wednesday – Create
Thursday – Test
Friday – Synthesize
Free resources
Testimonials
Marc helped us focus on customer discovery and validation before building anything. We refined our ICP, mapped user journeys, and validated pain points early instead of jumping into code. The customer insights we gathered transformed how we understood our market. Marc brings experience from cutting-edge products used by millions, and it shows in how he helps teams validate the right problem before building solutions. This process delivered immediate clarity on product-market fit.
Greg Kostello
CTO at CogziaMarc’s program was truly transformative, with exceptional ROI. In a short time I gained more clarity, structure, and momentum than I’d built in months of working alone. His targeted guidance and proven frameworks saved me countless hours and gave me a confident, impactful path forward. I fully trust Marc’s experience and methodology, and I’m excited to continue working with him as I take my projects to the next level.
Rachel Guthrie
Principal CX Manager at MicrosoftMarc's approach to customer discovery was eye-opening. He guided me through systematic validation of my business idea using customer interviews and user research methodologies I'd never applied before. Instead of building based on assumptions, I learned to validate pain points with real customers first. The customer insights I gathered gave me confidence that I was solving a real problem people would pay for.
Diana Schuetz
Founder at Safe PlayersBefore working with Marc, I had ideas but no systematic way to validate them with customers. Now I understand how to conduct proper customer discovery, validate pain points, and test assumptions before building features. The customer research framework he taught me transformed my approach from guessing to knowing what customers actually need. I strongly recommend this to anyone who wants to validate product-market fit.
Lubica Lutz
Lead Researcher at Pontis Foundation
BlinkBuild.ai Testimonials
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