Turn product invites into compounding growth.
WaterForGrowth shows product and growth teams where their viral loop accelerates—or leaks—so every activation and invitation can create the next wave of users.
Start free · No credit card required · Bring your team when ready
North-star metric
K = invites × conversion
What to expect
Clear numbers, honest signals.
No vanity-metric theater. Every view connects activity to the loop stage it can improve.
No fake growth promises. See whether K is compounding, assisted, or constrained.
One shared model. Product, growth, and lifecycle teams work from the same journey and definitions.
The loop, made legible
Find the stage holding growth back.
Follow one connected model from first value to the next activated user. Each stage gives your team a focused question and a measurable lever.
The equation to improve
K = i × c
Invitations per active user multiplied by invited-user conversion.
- 01
Activate
Reveal the first-value moment
Map the path from signup to activation and see exactly where new users experience the value worth sharing.
- 02
Invite
Design the invitation trigger
Place a useful, contextual invitation at the moment collaboration naturally improves the product experience.
- 03
Compound
Measure every turn of the loop
Track invites sent, acceptance, activation, cycle time, and viral coefficient without piecing together spreadsheets.
Pricing
Start with the loop you have.
Every plan starts with a free trial. Upgrade when your experiments and team need more room.
Explore
For founders mapping their first loop.
$0 / month
- One product loop
- Core K dashboard
- Up to 2 collaborators
- Experiment notes
Growth
For teams running a steady experiment cadence.
$49 / month
- Unlimited loop maps
- Stage and cohort analysis
- Up to 10 collaborators
- Experiment history
- CSV data import
Scale
For multiple products and operating teams.
$149 / month
- Everything in Growth
- Unlimited collaborators
- Multiple workspaces
- Priority onboarding
- Advanced exports
Questions before you map the loop?
Build the next wave
Stop guessing why users invite—or don’t.
Map your loop, find its constraint, and give your team the next experiment worth running.
Start with WaterForGrowth