See which funnel improvement would actually grow your product
Use this free simulator to compare traffic, conversion, activation, monetization, and retention side by side. Find out what is most worth fixing first.
Built for founders who want better growth decisions, not more dashboard noise.
Your funnel numbers
Enter your current metrics. The simulator will project the revenue impact of a 20% improvement in each stage.
Try a preset
Total unique visitors per month
Percentage of visitors who sign up
Percentage of signups who reach first value
Percentage of activated users who pay
Average monthly revenue per paying user
Percentage of paying users who stay each month
Common scenarios
Here is what the simulation reveals for typical startup funnels.
3,000 visitors, 4% signup, 18% activation, 25% paid
Strongest lever
Activation
With decent signup conversion but only 18% activation, most users leave before experiencing the product. Fixing onboarding beats adding more traffic.
12,000 visitors, 1.2% signup, 35% activation, 20% paid
Strongest lever
Signup conversion
High traffic but very low signup rate means the landing page or pricing page is the bottleneck. Small conversion gains multiply across a large visitor base.
5,000 visitors, 5% signup, 42% activation, 8% paid
Strongest lever
Paid conversion
The top of the funnel is healthy. Users are activating. But very few convert to paid. The monetization experience or pricing clarity is the constraint.
800 visitors, 6% signup, 45% activation, 30% paid
Strongest lever
Traffic
The funnel works well from signup through payment. The bottleneck is simply not enough visitors. Distribution and content are the priority.
4,000 visitors, 4.5% signup, 38% activation, 22% paid, 72% retention
Strongest lever
Retention
With 28% monthly churn, users leave faster than they arrive. Retention compounds: improving it from 72% to 82% roughly doubles the steady-state customer base.
2,000 visitors, 3% signup, 30% activation, 15% paid
Strongest lever
Activation
At 30% activation, the product is losing 70% of signups before they experience value. A 20% improvement in activation produces more revenue than a 20% increase in any other metric.
How to find the biggest growth bottleneck
Most founders know their product has multiple issues. The challenge is figuring out which one matters most right now. The Growth Impact Simulator works by projecting the revenue impact of improving each funnel stage by the same amount (20%) and comparing the outcomes. The stage that produces the largest gain is the one with the most leverage. For the full prioritization framework, see how to decide what to fix first.
Why more traffic is often not the answer
Traffic is the easiest metric to see and the most tempting to chase. But if only 18% of signups activate, doubling traffic doubles the number of users who sign up and leave. The simulation makes this visible: when downstream conversion is weak, traffic improvements produce smaller revenue gains than activation or retention improvements. Our vanity metrics guide covers why volume metrics mislead.
How activation and retention change growth more than expected
Activation improvements multiply every signup. Retention improvements compound over time. A product that activates 40% of signups instead of 20% grows twice as fast from the same traffic. A product that retains 92% instead of 82% monthly has roughly double the steady-state customer base. These effects are hard to see without a simulation. The activation guide and the case study on fixing the right bottleneck show these dynamics in practice.
What to fix first when everything looks broken
When multiple metrics are weak, the instinct is to fix everything. But splitting effort across five problems means each one gets a shallow fix that does not move the number. The simulation helps by showing which improvement has the largest projected impact. Start there. Ship one change. Measure for a week. Then move to the next lever. Sequential focus beats parallel effort. The five metrics that matter guide covers which numbers to track and in what order.
Keep reading
Explore related tools, guides, and case studies.
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