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Proof

Proof that the work becomes a system, not another strategy deck.

Before/after evidence from founders who built repeatable acquisition systems. Same Problem / Action / Result format for every case.

£18M+ revenue generated
£6.8M+ paid spend managed
20+ startups advised
4.97/5 220 mentor reviews
Case Studies

Before, after, and the system that made it stick.

Each case study follows the same structure: problem, intervention, system built, numbers, timeline, and why it worked.

eCommerce

eCommerce: 21% retention uplift in three months

Acquisition was producing customers. The product produced repeat orders. The lifecycle programme didn't bridge them.

+21% 90-day repeat purchase rate
3.2× Win-back conversion rate
+18% Lifecycle revenue contribution
Read the case →

Fintech · Consumer

Fintech: CAC down 35% in eight weeks

The team was paying full-funnel CAC for users who would never reach the funnel that mattered. Eight weeks of structural fixes.

-35% Customer acquisition cost
+28% Conversion rate (paid → activated)
11 → 6 Number of active campaigns
Read the case →

B2B SaaS · AI workflow

B2B SaaS: from founder-led chaos to a weekly GTM cadence

The founder was still approving every message test. The fix was a tight weekly cadence, clearer ICP, and one owner map — not more channel spend.

-18% Sales cycle (median)
3 → 7 Experiments shipped / month
-35% Founder hours on GTM
Read the case →

HealthTech · AI

AI HealthTech: 6× monthly app downloads in 6 months

Acquisition was busy. The app had press, downloads, and a working app store listing. What was missing was a system.

Monthly downloads
+38% Activation rate
-41% Cost per qualified install
Read the case →

B2B SaaS

90-Day B2B SaaS Growth System Case Study

90 days from reactive marketing to a working GTM operating system.

2.4× Qualified pipeline
+42% Reply rate on outbound
3 Channels actively invested in
Read the case →
Testimonials

What founders say after the work.

Feedback from mentoring, advisory, and growth sessions.

"We really benefited a lot from the insights we got from our conversation. Keep it up."

Ari Bencuya

3x founder and startup mentor · GrowthMentor

"I was able to increase my revenue by about 40%, and most of that improvement can be traced back to Daniel's call."

Christian A.

Co-founder · AI HealthTech

"Very actionable insights from his experience and straight to the point. Exactly what I was hoping for."

Fabi Herrmann

Fractional practitioner · Independent

"He helped me understand the nuances of building a landing page, and he's quick on his feet."

Hal Zeitlin

Webflow agency owner · Enterprise partner

"I am very impressed by Daniel's detailed insight when working with startups through Google Launchpad."

James Lethem

Programme collaborator · Google Launchpad

"You can tell if someone is legit by how much value they can pack into a short call. During 15 minutes, Daniel dropped multiple value bombs and validated a few assumptions we had about the industry."

Kamil Kaminski

Founder · Startup operator

Mentorship

GrowthMentor & MentorCruise credentials.

Top-rated mentor with 479+ sessions and 4.97/5 average rating.

GrowthMentor 4.97/5 · 220 reviews · 479+ sessions
MentorCruise Verified mentor profile
Techstars Active mentor · startup accelerator programmes
UK Space Agency Innovation talk speaker and workshop facilitator
Google Launchpad Startup mentor and workshop facilitator
FAQ

Questions about the proof.

How to read the evidence and what it means for your company.

How should I verify these outcomes?

Read the individual case studies, check the GrowthMentor reviews, or book a 20-min Growth Audit to discuss your specific context.

Does this guarantee the same result for my company?

No. Every company has a different constraint map. The proof shows what was fixed in each context — your bottleneck may be different.

Can I use these numbers in my own materials?

Yes, with attribution. Please cite Daniel Johnson or We Scale Startups when referencing specific metrics.

Next step

Book a 20-min Growth Audit.

20 minutes on your specific situation. You'll leave with a clearer read on your biggest growth bottleneck.

Last updated: 11 May 2026