Measurement-first growth partner

The only growth partner that starts with measurement.

We build clean measurement infrastructure, then run the growth engine on top of it. Every pound you spend is tracked to revenue — not traffic, not leads, revenue.

Book a free measurement audit →

No retainer lock-in. Cancel any time.

Currently taking on 3 new clients this month
11+
Startups grown worldwide
−41%
Avg. CAC reduction
3.2x
Avg. pipeline growth
90d
Typical impact window
Across our clients →
Trusted by ambitious startups
The thesis

Measurement first.
Growth second.
Always in that order.

Most growth agencies optimise vanity. Clicks, impressions, cost-per-lead. The metrics that are easy to measure — not the ones that drives revenue.

We do it backwards. Before we touch an ad account, we wire server-side conversion tracking, build the data warehouse, and model attribution on your actual pipeline. Then — and only then — we scale spend. Every system, dashboard, and strategy we build belongs to you. No black boxes. No dependency on us to keep it running.

Every pound you spend with us is tracked to revenue. Not traffic. Not leads. Revenue.

How we work

A three-phase engagement. Measurement, then infrastructure, then scale.

01 Weeks 1–2

Measurement audit

Two weeks. We inspect every touchpoint, every pixel, every row in your warehouse. You get a map of what's tracked, what's guessed, and what's broken.

02 Weeks 3–6

Infrastructure build

Server-side tracking. Identity resolution. Attribution model on your actual funnel. Dashboards that show revenue, not vanity.

03 Month 2+

Growth engine

Now we scale spend — with a clean feedback loop. Weekly reviews, monthly reforecasts, quarterly reality checks.

Client results

When tracking is clean, the numbers stop guessing.

View all case studies →
Saas
Kredify

From ₦1M/month wasted on unattributed Meta spend to a verified 4.1× ROAS — in 10 weeks.

4.1×
Verified ROAS
−62%
Cost per verified sign-up
The problem

Kredify, a Lagos-based lending startup, was spending ₦1M monthly on Meta ads with no reliable way to track which campaigns were generating actual loan applications — versus people who clicked but never completed KYC. Their dashboard, CRM, and finance team all showed different numbers. Nobody could agree on what was real.

The outcome

From ₦1M/month wasted on unattributed Meta spend to a verified 4.1× ROAS — in 10 weeks.

View case study →
Saas
AfyaCare

3.4× more appointment bookings. Same ad spend. Zero additional headcount.

3.4×
Monthly appointment bookings
−54%
Cost per booked appointment
The problem

AfyaCare, a private clinic network with locations in Lagos and Abuja, was running Google Ads through a generalist agency. Ads were live, spend was going out — but the clinic coordinators had no idea which campaigns were actually driving people through the door. The agency was reporting clicks. AfyaCare needed to know about bookings.

The outcome

3.4× more appointment bookings. Same ad spend. Zero additional headcount.

View case study →
→ Want results like these?

Start with a free measurement audit. No commitment.

Book your audit →
Who we are

Built by founders who've sat where you sit.

Mowsix is an independent growth partner working with ambitious startups across the UK and Nigeria. We are senior-led — every engagement is run by people who have built and scaled businesses, not pyramid-managed by junior account staff.

Our model is simple: clean measurement, honest reporting, and real revenue impact. No retainer lock-ins, no percentage of ad spend, no fluff.

Meet the team →
Founder portrait / team photo
What founders say

"We thought we knew our funnel."

View all testimonials →

"The audit Mowsix ran in week one surfaced issues our previous agency had missed for 18 months. The results since working with them is exceptional"

AN
Amaka N.
Head of Growth, Kredify

"Most agencies tell you what you want to hear. Mowsix told us our conversion rate problem was actually an onboarding problem. They were right. MRR doubled in 6 months"

SK
Sarah K.
Co-founder, Saas Startup

"We went from 4 organic landlord leads a month to 31 in 6 months. They built us a content and SEO engine we now own entirely. No dependency on them to maintain it."

DC
David C.
Founder, Vantage Lettings

"Before Mowsix, we were spending £3k a month on paid and genuinely couldn’t tell which channel was driving pipeline. Within 6 weeks they had our tracking completely overhauled and we cut our CAC by 38%. It changed how we make every marketing decision"

JO
James O.
CEO, PropTrack Analytics

"The audit Mowsix ran in week one surfaced issues our previous agency had missed for 18 months. The results since working with them is exceptional"

AN
Amaka N.
Head of Growth, Kredify

"Most agencies tell you what you want to hear. Mowsix told us our conversion rate problem was actually an onboarding problem. They were right. MRR doubled in 6 months"

SK
Sarah K.
Co-founder, Saas Startup

"We went from 4 organic landlord leads a month to 31 in 6 months. They built us a content and SEO engine we now own entirely. No dependency on them to maintain it."

DC
David C.
Founder, Vantage Lettings

"Before Mowsix, we were spending £3k a month on paid and genuinely couldn’t tell which channel was driving pipeline. Within 6 weeks they had our tracking completely overhauled and we cut our CAC by 38%. It changed how we make every marketing decision"

JO
James O.
CEO, PropTrack Analytics

"The audit Mowsix ran in week one surfaced issues our previous agency had missed for 18 months. The results since working with them is exceptional"

AN
Amaka N.
Head of Growth, Kredify

"Most agencies tell you what you want to hear. Mowsix told us our conversion rate problem was actually an onboarding problem. They were right. MRR doubled in 6 months"

SK
Sarah K.
Co-founder, Saas Startup

"We went from 4 organic landlord leads a month to 31 in 6 months. They built us a content and SEO engine we now own entirely. No dependency on them to maintain it."

DC
David C.
Founder, Vantage Lettings

"Before Mowsix, we were spending £3k a month on paid and genuinely couldn’t tell which channel was driving pipeline. Within 6 weeks they had our tracking completely overhauled and we cut our CAC by 38%. It changed how we make every marketing decision"

JO
James O.
CEO, PropTrack Analytics
Frequently asked

Questions we get on the call.

How long is a typical engagement?
+

Three to six months. Two-week audit, four-week infrastructure build, then a rolling growth retainer. We don't lock you in — 30 days notice after month three.

What stage of startup do you work with?
+

We work with all kind of startups no matter the series you are. From Post-seed to Series D+. You need at least £10k/month in paid spend (or the runway to build up to it) for our model to make sense. Below that, a measurement audit alone still pays for itself.

Do you manage ad accounts directly?
+

Yes — but only after the measurement layer is live. We won't run spend against a broken tracking stack. That's non-negotiable.

Which channels do you cover?
+

Paid search, paid social, programmatic, SEO/GEO and lifecycle. We partner with influencer when it makes sense.

How is pricing structured?
+

Free audit. Flat monthly fee for the growth engagement, sized to your spend. No performance fees — they misalign incentives.

Stop guessing. Start measuring.

45-minute audit call. We diagnose your tracking, attribution, and the gap between spend and pipeline. No pitch.

Book your free audit ↗

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