Test your riskiest assumptions before they sink your venture.
Capture every assumption, rank them by risk, and confront the ones that matter most — before you burn time building the wrong thing.
Enterprise buyers will pay $50k/yr for this
Critical12 days untested
Users can onboard without a demo call
High5 days untested
Teams will share assumptions across projects
Medium3 days untested
Most ventures don't fail from bad execution. They fail from untested beliefs.
Every founder carries a stack of assumptions — about their customer, their pricing, their channel, their timing. The ones that go untested the longest are usually the ones that kill the venture. Assumption Mapper makes them visible, ranks them by risk, and won't let you look away.
How It Works
Capture
Write down every assumption your venture depends on.
Rank
Score each by importance and current evidence.
Focus
See the riskiest assumptions rise to the top.
Test
Design experiments to validate or kill them.
Decide
Pivot, persist, or move on — based on evidence.
Capture
Write down every assumption your venture depends on.
Rank
Score each by importance and current evidence.
Focus
See the riskiest assumptions rise to the top.
Test
Design experiments to validate or kill them.
Decide
Pivot, persist, or move on — based on evidence.
Your daily confrontation with reality.
Every morning, Assumption Mapper shows you the beliefs you're betting your venture on — ranked by how risky they are and how long they've gone untested. No more hiding behind backlogs and feature roadmaps. Just the hard questions you need to answer.
The assumptions that have been sitting untested the longest glow hotter. You can't unsee them. That's the point.
Enterprise buyers will pay $50k/yr for this
Critical12 days untested
Users can onboard without a demo call
High5 days untested
Teams will share assumptions across projects
Medium3 days untested
Built for how founders actually think
Capture in seconds
Add assumptions as fast as you think of them. Tag by category, link to your venture, and move on. The friction is near zero.
Evidence-based ranking
Each assumption gets scored by importance and evidence strength. The riskiest ones — high importance, low evidence — surface automatically.
Clear decision points
When the evidence is in, mark assumptions as validated or invalidated. Build a track record of evidence-based decisions.
“Built by a venture builder with 13 years of experience turning corporate ideas into standalone businesses — across Europe and Greater China. This is the tool I wished I had on every engagement.”
Matthieu Bodin
Founder, The Motion Bridge
Simple pricing
Start free. Upgrade when you need more.
Free
For solo founders testing ideas.
- Up to 3 ventures
- Unlimited assumptions
- Focus View
- Evidence logging
Pro
For serious builders running multiple ventures.
- Unlimited ventures
- Team collaboration
- Export & reporting
- Priority support
Team
For venture studios and innovation teams.
- Everything in Pro
- Shared assumption library
- Admin controls
- Custom integrations
Enterprise
For corporate innovation programs.
- Everything in Team
- SSO & compliance
- Dedicated support
- Custom onboarding
No credit card required. Start building your assumption map in under 2 minutes.