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
Tasklo

Scaling from £9k to £20k MRR — without increasing ad spend.

£20k
MRR (from £9k)
−38%
Blended CAC
The problem

Tasklo, a project management SaaS for remote-first startups, had decent traffic but a 0.8% trial conversion rate. Paid spend was profitable but plateauing — and scaling budget alone wasn't moving the needle. They needed compounding growth, not more ad spend.

The outcome

Scaling from £9k to £20k MRR — without increasing ad spend.

View case study →
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 →
→ 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 →
Free tool

How sustainable is your startup's growth?

Enter your unit economics. Get a Sustainability Score, your CAC payback period, and the three changes that would move them most. 90 seconds.

Try the calculator →
Sample result
64/100
Watch your back
LTV : CAC2.4 : 1
CAC Payback9.2 mo
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"

Amaka N.
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"

Sarah K.
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."

David C.
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"

James O.
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"

Amaka N.
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"

Sarah K.
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."

David C.
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"

James O.
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"

Amaka N.
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"

Sarah K.
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."

David C.
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"

James O.
James O.
CEO, PropTrack Analytics
Rated by founders on Google ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 4.0 (1 reviews) Google
Frequently asked

Questions we get on the call.

Why Mowsix?
+

Most agencies sell campaigns. We sell measurement infrastructure that survives the engagement. Every system, dashboard, and process belongs to you when we're done. No black-box reporting, no dependency on us to maintain it.

Do you work with early-stage startups?
+

Yes — but with a caveat. If you haven't nailed your ICP or established product-market fit, we'll tell you to fix that first. Marketing investment before PMF burns money. We'd rather lose the engagement than help you waste it.

How is Mowsix different from a generalist digital marketing agency?
+

Generalists optimise for vanity metrics — clicks, impressions, engagement. We optimise for revenue. Before we touch your ad accounts, we wire your tracking, build your attribution model, and connect spend to pipeline. Then we scale.

How do you measure success?
+

Revenue you can forecast. CAC trending down. Pipeline tied to specific channels. Whichever metric matters most to your board, we make it visible — then move it. We don't measure success in agency-deliverables.

Who does Mowsix serve?
+

Senior-led startups across the UK and Nigeria — primarily SaaS, fintech, real estate, and ecommerce. Most of our clients are founder-led with at least one product market fit signal, and serious about growing measurably rather than fast.

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?
+

All stages — but the model fits best post-PMF. You need a real product, a defined ICP, and at least the runway to invest in growth. Below that, an 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?
+

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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