For Growth-Stage Founders
You found the fit.
Now keep it.
Product-market fit is the beginning, not the finish line. Subtract to Ship: Grow and Scale are the operator's manual for the stage where the product wants to re-bloat faster than you can ship.
The problem
The fit worked. Now everything else is breaking.
-
Revenue drops when you step away
You take a week off and the pipeline stalls. Growth depends on the founder being in every conversation, every sale, every fire.
-
Customer emails at 11 PM
Support, onboarding, feature requests. The system that got you to product-market fit is now the system keeping you from scaling past it.
-
The product wants to re-bloat
Every customer conversation generates a feature request. Every hire adds a dependency. The lean thing you shipped is getting heavy again.
Two volumes for this stage
Grow the revenue. Scale the operation.
Each volume stands alone. Together they form the complete post-PMF manual.
Volume 3
Subtract to Ship: Grow
Marketing without hating marketing. How to read post-launch signal, choose the next thing to add, and keep the product shape coherent under five directions of growth pressure.
Start here if: revenue is unpredictable, or you have no repeatable acquisition channel.
Read about GrowVolume 4
Subtract to Ship: Scale
Operations and systems. How to keep a removing culture alive past forty employees, when the founders are no longer in every decision and the org chart is growing faster than the product.
Start here if: revenue is solid but you are the bottleneck.
Read about ScaleBuilt from experience
Not theory. Operating history.
- 12 products shipped & exited
- 4.9 star average across 50+ countries
- 0 returns at Vulpine Creations
Felix Lenhard co-founded Vulpine Creations, grew it to twelve products selling across more than fifty countries, and exited in 2024. The Grow and Scale volumes capture the operating playbook from that run.
FAQ
Questions from growth-stage founders.
- Which book do I read first — Grow or Scale?
- If revenue is unpredictable, start with Grow. If revenue is solid but you are the bottleneck, start with Scale.
- Is this for SaaS, physical products, or services?
- All three. The method was built across physical products (Vulpine Creations), consulting services (Vulpine Industries), and software.
- We have a team of 40+. Does this still apply?
- Scale was written for exactly this stage. The challenge is keeping a removing culture alive past the point where founders are in every decision.
- What does subtraction mean at growth stage?
- It means saying no to the next feature, the next market, the next hire — until you can defend why adding it will not break what is already working.
- Are the books available yet?
- Both release September 15, 2026. Sign up for the letter to get excerpts early.
Stay close
Get operator notes before the books ship.
Both volumes release September 15, 2026. The letter is the way to read excerpts early.