Strategic finance for scaling SaaS & FinTech

We turn founder-built finance functions into scale-ready ones.

Patchwork spreadsheets, manual reporting, a drowning finance team and board packs that don't land. Stratum diagnoses how your finance function actually works, rebuilds it, then runs it with you or hands it clean to your next senior hire.

Seed → Series B  sweet spot US · UK · ZA  client base CA(SA)  led, senior-only delivery
The problem

Your finance function was built reactively. Now it's the bottleneck.

Every scaling company hits this point. The signs are always the same.

The close drags

Month-end takes weeks, numbers get questioned in the board meeting, and nobody fully trusts the model.

The team is drowning

Capable people spend their week on manual pulls, copy-paste reporting and rework instead of analysis.

Data has no single source

Metrics live in five spreadsheets and three tools. Every report starts from scratch.

Investors aren't convinced

The deck and board pack describe the business, but they don't tell its story or survive diligence.

Hiring a senior finance leader into this doesn't fix it. They inherit the mess and spend six months cleaning it up. Fix the function first.

The Stratum method

Built in layers. Foundation first.

Every engagement follows the same arc: understand the function as it really operates, rebuild it, then run the cadence it deserves.

LAYER01

Diagnose

A fixed-fee, two-to-three week review of what your finance team actually does: every task, every data source, every report. You get a data lineage map, a critical assessment of what's needed versus habit, and a prioritised fix list.

Finance Function Diagnostic · fixed fee
LAYER02

Rebuild

A 60 to 90 day transformation sprint. Processes streamlined and automated, your team upskilled so the gains stick, reporting rebuilt into a genuine storytelling asset, and a Power BI layer over a clean data model.

Transformation Sprint · outcome-scoped
LAYER03

Run, or hand over

Either Stratum stays on as your fractional strategic finance partner, running forecasting, scenarios and board reporting on retainer, or we hand a clean, documented function to the senior hire you always planned to make.

Retainer, or pre-hire handover
Services

Five ways in. One standard of finish.

Entry

Finance Function Diagnostic

The full picture of how your finance function operates today and exactly what to fix, in priority order.

For founders who think: "Something's broken. I just can't see what."
Core

Transformation Sprint

Processes, data flows, reporting and team capability rebuilt end-to-end so the function scales with the company.

For founders who think: "Finance is the bottleneck to our next stage."
De-risk

Pre-Hire Cleanup

We clean up before your Head of Finance or CFO starts, so your hire walks into a working function, not a salvage job.

For founders who think: "I don't want my new hire fixing a mess for six months."
Cover

Interim Finance Leadership

Senior capacity when your finance lead leaves, goes on leave, or a raise lands on an already stretched team.

For founders who think: "We need senior hands this month, not next quarter."
Retainer

Fractional Strategic Finance

FP&A, driver-based modelling, scenario analysis, board and investor reporting. A senior finance partner, without the $300k hire.

For founders who think: "I need a finance brain in the room, part-time."
Sprint

Fundraise Readiness

Investor-grade model, a deck that tells your story, and a data room built to survive diligence.

For founders who think: "We raise in six months and we're not ready."
Why Stratum

Senior-only. Systems-minded. Story-driven.

Stratum is led by a Chartered Accountant CA(SA) who has performed this exact transformation repeatedly inside scaling companies: as the operator, not the advisor. You work with the person who has done the job.

Strategic FP&A and modelling

Driver-based three-statement models, scenario analysis and runway maths that boards actually use.

Data modelling, not just dashboards

Power BI and Excel models built on clean schemas and proper transformations, not charts sitting on top of messy exports. Most fractional CFOs read the data. Stratum structures it first.

Visual storytelling

Board packs and pitch decks treated as narrative devices, on brand, every time. Brand Finance is a philosophy here, not a slide template.

Teams left stronger

Your people are upskilled as part of every engagement. When we leave, the gains stay.

Seed → B

The stage we build for: the point where founder-built finance either scales or breaks.

GMT+2

Full working-day overlap with the UK and Europe, and a productive overlap with the US East Coast.

100%

Senior delivery. No leverage pyramid, no juniors learning on your business.

Engagement model

Priced on outcomes, not hours.

Hourly billing rewards slow work. Stratum scopes to results.

Step 1

Fixed-fee diagnostic

A defined price, a defined window, a concrete deliverable. Low-risk way to see how we work.

Step 2

Outcome-scoped sprint

The transformation itself, scoped against the diagnostic roadmap with agreed outcomes, not open-ended time.

Step 3

Monthly retainer

We run the cadence we built: forecasting, scenarios, board reporting, and a finance partner on call.

No lock-in. Retainers run month to month. If the right answer for your stage is a full-time hire, we'll tell you, and hand over clean.

Free · 15 minutes of your data

The Cash Runway Diagnostic

Send your last three months of financials. You get back a one-page view of your true runway, burn quality and the three numbers your next board meeting will turn on. No pitch attached.

Ready when you are

Your next stage deserves a finance function built for it.

Tell us a bit about where things stand. You'll hear back within a business day.