free
Opportunity Radar
Explore trends, markets, problem spaces, and transfer potential before you force yourself into a premature idea.
Created by Sebastian Donath · free · ChatGPT login required
Guided founder workspace · University founders
Your next founder move.
Turn startup uncertainty into a clear next step — with free AI checks and a guided 6-week founder sprint.
No account needed for the free checks. Sprint access for invited or approved founders.
Find your next move
Where are you right now?
Pick your situation. Founder OS points you to the next useful step.
Free AI check
No clear startup idea yet?
Next step: Explore opportunities
See Opportunity RadarFree AI check
Have an idea, but unsure if it's strong?
Next step: Challenge assumptions
See Validation Co-PilotFree AI check
Thinking about grants or funding?
Next step: Check funding readiness
See Financing NavigatorGuided Sprint
Ready to work seriously?
Next step: Join the guided Sprint
See the SprintEvent Radar
Need momentum or a deadline?
Next step: Find events and opportunities
Open Event RadarTool library
Free AI Checks
Quick starting points before deeper guided work.
Do not paste confidential research, IP-sensitive details, EXIST application text, business secrets, or personal data into public AI tools. Use anonymized, shortened, or fictionalized descriptions where possible. Before using external AI tools, check your account settings and disable data sharing or model training where available.
free
Validation Co-Pilot
Challenge your problem, target group, assumptions, value proposition, and first validation logic.
Created by Sebastian Donath · free · ChatGPT login required
free
Startup Financing Navigator
Explore possible funding paths and identify what evidence, clarity, or preparation may still be missing.
Use a high-level description only — no full applications or confidential details.
Created by Sebastian Donath · free · ChatGPT login required
Core offer
The 6-week Founder OS Sprint.
A guided AI-first workspace for turning startup uncertainty into validation work, sharper decisions, and a clearer next-step plan.
Use weekly lessons, prompt chains, checklists, simulations, and synthesis sessions to move from orientation into structured founder work.
Different by design
Guided founder work —
not a prompt dump.
Use curated prompt chains, checklists, simulations, and synthesis sessions to challenge assumptions, prepare conversations, and turn vague ideas into concrete tests.
6-week structure
A focused path instead of open-ended startup homework.
Prompt chains & checklists
Curated workflows for validation, communication, and next-step decisions.
Simulations & synthesis
Practice interviews, funding conversations, and turn signals into decisions.
Funding & coaching prep
Prepare sharper conversations with coaches, funders, partners, and investors.
Why Founder OS exists
Founder work gets messy before it gets real.
Early teams rarely fail because they lack ideas. They get stuck when validation, communication, funding readiness, and next-step decisions stay disconnected.
Scattered thinking
Ideas, AI outputs, and advice pile up — but the next useful move stays unclear.
Weak evidence
Assumptions, customer signals, and funding logic do not yet add up to confident decisions.
Unclear communication
Pitch, target group, offer, and coaching conversations drift apart instead of sharpening each other.
Founder OS connects the work — so you can move from uncertainty to structured founder action.
Built by Sebastian Donath
Shaped by recurring founder patterns.
Founder OS is informed by startup coaching, validation work, pitch training, funding-readiness support, and structured incubation formats — translated into a guided workspace.
University startup coachingValidation · Pitch · Funding readinessBuilt for students, researchers, and early teams
Not founder theater. Real founder work.
Events & opportunities
Events that create motion, not noise.
Some founders don’t start with a tool. They start with a deadline, a pitch event, a workshop, or a funding opportunity.
Return when you need a deadline
Use events as a trigger for action.
Browse categories that can create a next step: deadlines, funding info, pitch formats, workshops, expert input, matching, or ecosystem opportunities.
Founder CommunityPitch & DemoFunding & GrantsWorkshopLegal / IP / TaxResearch TransferStartup EcosystemDeadlinePartner Offer
Start free. Go deeper when you are ready.
Use a free AI check to test your current situation — or request Sprint access when you are ready for guided founder work.
FAQ
Practical answers for your next founder move.
Can Founder OS help me validate a startup idea?+
Yes. Founder OS helps you move from vague assumptions to structured validation work. You can clarify what needs to be true, prepare better customer conversations, collect early signals, and turn what you learn into clearer next decisions.
Can Founder OS help me find the right target customers?+
Yes. Founder OS supports you in narrowing your target group, understanding who has the strongest problem, and preparing conversations that reveal real needs instead of collecting polite feedback.
Can Founder OS help with funding readiness?+
Yes. Founder OS helps you structure your funding logic, sharpen your assumptions, prepare for coaching or grant conversations, and explain why your idea could become a credible venture. It can support preparation for grants, EXIST-style thinking, pitch conversations, or early investor discussions — but it does not replace official funding, legal, or tax advice.
Can Founder OS help me communicate my idea more clearly?+
Yes. Founder OS helps you sharpen your positioning, pitch, target group logic, and founder story. The goal is not just to sound better, but to make your business logic easier to understand and challenge.
What makes Founder OS different from just asking ChatGPT?+
Founder OS is not a random prompt collection. It gives you a structured path, curated workflows, reflection steps, simulations, checklists, and synthesis tasks so AI becomes part of a founder development process instead of another source of scattered output.
Do I need to know exactly what I want to build?+
No. Founder OS can support different starting points: no clear idea yet, an early idea, a research result, a validation question, a funding challenge, or the need to communicate your startup more clearly.
Who is Founder OS for?+
Founder OS is built for early-stage founders, students, researchers, corporate employees exploring a venture path, and startup teams who want to work more seriously on validation, customer clarity, communication, and funding readiness.
What is the 6-week Founder OS Sprint?+
The Sprint is the guided core offer: a structured AI-guided path for turning uncertainty into practical founder work. Across six weeks, you work on validation, customer understanding, positioning, communication, funding readiness, and concrete next steps.