Run your startup thesis into a defensible problem definition and a validation brief you can execute - grounded in evidence, not prompts.
Not because they couldn't build, but because the problem they chose was invisible, too broad, or sounded like everyone else's.
Without a clear beachhead and a defensible problem definition, even well-built products struggle to earn attention, trust, or traction. What looks like a growth problem is often a clarity problem.

Clarno helps founders make market pain visible and specific, so they know what to test, who to target, and where to start. It turns early research into clear decisions instead of guesswork.
Follow proven frameworks to identify a niche market, uncover real problems, and build what people actually want.
No assumptions or guesswork. Every decision is grounded in secondary research and real market signals, not made up conclusions.
Turn your concept into downloadable assets for fast primary research and validation, resulting in investor-ready assets with no hidden assumptions or gaps.
Reduce the clutter around your ideas to find a clear, testable direction for your product, moving from months of uncertainty to days of focused decision-making.
Generates structured, shareable assets that capture your idea, reasoning, and direction in a form investors can review, assess, and discuss with confidence.
Clarno is for people who want to make better decisions before committing time, code, or capital.
Independent founders who want to move fast without building the wrong thing, using clarity and validation instead of guesswork.
Teams preparing for applications or interviews who need evidence of real customer pain, learning velocity, and structured validation.
Pre-seed and seed founders who need a clear, defensible problem narrative for investors before their next round of conversations.
Internal venture teams that require evidence-backed opportunity briefs to align stakeholders and unlock decisions.
"What I liked most was that it didn't try to convince me my idea was good. It challenged it. By the end, I had something I could explain to others without stumbling or hand-waving"
Marta Köhler,
Signalweave

"I kept going in circles trying to decide what to focus on. This finally forced me to pick a lane and justify it. I stopped rewriting the same idea over and over and actually moved forward."
Jason Miller,
Harbourstack

"I was stuck between two directions and kept asking people for opinions. Clarno made me realize what I was missing and why the feedback felt noisy. It saved me weeks of second-guessing."
Danie Smith,
Rivolo Labs

Test your thinking, pressure-check the problem, and decide what to build next before you commit time or code.
See How It Works