The NBT Growth Model: Full-Funnel Growth as a System

Most growth teams don't fail because they work too little. They fail because they work on the wrong things, in the wrong order, without a system holding the work together.

We see this pattern constantly. A team runs a LinkedIn campaign because a competitor is running one. They hire a content writer because another startup just did. They buy HubSpot because someone on the board recommended it. Each decision is defensible in isolation. Together, they produce activity without direction, a collection of tactics that never compounds into a growth engine.

The NBT Growth Model is how we fix this. It's not a framework we invented in a workshop. It's the operating logic we've refined over ten years of running growth for more than 2,000 startups and scaleups across the UK, EU, MENA, US, and Asia. Every engagement we run moves through it. This article explains what it is, why each stage matters, and how to tell whether your own growth is running as a system or as a collection of tactics.

The Gap That Kills Most Growth Programmes

When growth teams underperform, leadership usually asks one of two questions: is it a strategy problem, or is it an execution problem? Both framings miss what's actually happening.

The real problem is almost never pure strategy or pure execution. It's the gap between them. A strategy without execution rhythm becomes a slide deck that ages in a shared drive. Execution without strategic direction becomes a busy team shipping campaigns that don't compound. The question that matters is whether there's a connective tissue between what the business is trying to achieve and what the growth team is actually doing this week.

That connective tissue is what the NBT Growth Model provides. Four stages, run as a continuous loop rather than a linear cascade, each producing outputs that feed the next. It's deliberately unglamorous. The power is in the consistency, not the novelty.

The real problem is almost never pure strategy or pure execution. It's the gap between them.

The Four Stages at a Glance

Before going deep on each stage, here's the whole model in a single view:

Each stage has a specific job, a specific output, and a specific handoff to the next stage. The stages aren't optional, and they aren't interchangeable. A team that tries to skip the Checkup and jump straight to Navigation is the team that ends up running tactics that don't compound. A team that stays in Checkup and Formulation forever is the team that's great at slides and bad at pipeline.

Stage 1: Growth Marketing Checkup

The question this stage answers: What's actually happening right now, and where is the real constraint?

The Checkup is structured diagnosis. External and internal. We're looking for the constraint that, if unaddressed, will make everything else you do less effective. Sometimes the constraint is positioning, the product is fine, but the market doesn't understand what it's for. Sometimes it's funnel integrity, leads are coming in but conversion breaks at a specific handoff. Sometimes it's asset readiness, the team wants to run campaigns, but the landing experience can't support them.

The Checkup looks at the market, the competitive landscape, and internal readiness across five dimensions: product maturity and traction, revenue consistency and growth goals, asset readiness, activity readiness, and execution ownership. That last one matters more than most teams realise. A growth plan without a named owner, a cadence, and a learning loop is a plan that won't execute.

What comes out of Stage 1 is a prioritised view of what's limiting growth, what's working and should be protected, and what needs to change before money is spent on campaigns. Without this, every subsequent decision is a guess.

Example: A European B2B SaaS company we worked with last year had what looked like a paid media problem, rising CPLs, falling conversion. The Checkup showed the issue wasn't in paid media. It was that their ICP definition had drifted over 18 months as the product evolved, and the team was still targeting who they used to sell to, not who they now sold to. No amount of campaign optimisation would have fixed that. We reset the ICP in Stage 2, and the existing campaigns started performing without new budget.

Stage 2: Growth Route Formulation

The question this stage answers: Given what the diagnostic surfaced, what's the right path forward?

Formulation is where direction gets set. The output is a growth route: a defined set of personas, a funnel designed around how those personas actually buy, and a go-to-market plan that names which channels, messages, and motions you'll run against that funnel.

Most teams underestimate how much of this work is decisive rather than descriptive. It's tempting to treat ICP and funnel design as documentation exercises, write it down, move on. The teams that get this stage right treat it as a series of genuine choices. Which persona do we prioritise, and which one do we deprioritise? Which stage of the funnel is the constraint, and which one is fine? Which channels fit this business, and which are we running because everyone else does?

A clean growth route answers three questions without hedging. Who exactly are we selling to. What is the journey they take from not-knowing-us to buying from us. And what's the sequence of channels, messages, and actions we use to move them along that journey. If you can't state all three in a single page, the route isn't ready yet.

Stage 2 outputs feed Stage 3. Without them, execution has no target.

Stage 3: Growth Navigation

The question this stage answers: Given the route, how do we execute across the full funnel, as one coordinated system?

Navigation is execution. But it's execution within a structure that most teams don't have: a full-funnel view that integrates Owned, Paid, and Earned media across every stage of the customer journey, with each activity tied back to the route set in Stage 2.

The NBT Growth Model organises execution across six capability areas: Strategy, Paid Media, Content & Social Marketing, CRM & Automation, Owned Media, and Sales Enablement. Each one has specific activities. Paid Media is campaign design, A/B testing, and optimisation across LinkedIn, Google, and Meta. Content & Social is blogs, case studies, gated content, inbound SEO, and social channel management. CRM & Automation is lifecycle workflows, lead scoring, and the handoff from marketing to sales. Owned Media is the website, landing pages, analytics, and conversion optimisation. Sales Enablement is the narrative, decks, sequences, and collateral that turn leads into revenue.

The point isn't that NBT does all of these at once. The point is that in any engagement, we know which of these capabilities the route requires, in what order, and how they connect. A team running paid media without CRM integration is building a funnel with a hole in it. A team publishing content without a sales enablement layer is generating interest that never gets converted. Navigation is about running the capabilities as one coordinated system, not as parallel departments.

Example: A UK-based fintech we've worked with couldn't explain why their paid media campaigns produced plenty of MQLs but almost no pipeline. Stage 3 surfaced it in a week: the MQLs were landing in HubSpot with no lifecycle automation, no lead scoring, and no structured handoff to sales. The campaigns weren't broken. The navigation between campaigns and sales was. Six weeks of CRM work later, the same campaigns were producing pipeline without any change to the ads.

Stage 4: OKR-Driven Optimisation

The question this stage answers: What's actually working, what isn't, and what do we do about it?

Optimisation is where most growth frameworks lose discipline. It's the stage that gets described as "test and learn" in glossy pitches and delivered as "run the thing we were running, but check the numbers occasionally" in practice. The difference between teams that compound and teams that plateau is almost entirely in how seriously they run this stage.

Three things matter here. First, OKRs that actually cascade, a 90-day objective at the company level translates into team-level OKRs that translate into weekly sprint commitments. Without the cascade, OKRs become wallpaper. Second, testing that produces learning rather than just variation. An experiment isn't just a variant that won or lost. It's a hypothesis that got confirmed or rejected, and the learning compounds into the next experiment. Third, the willingness to kill things. Channels, campaigns, tactics, messages that aren't working need to be stopped, not just nudged.

Done well, Stage 4 doesn't just tune performance. It feeds back into the earlier stages. The learnings from optimisation reshape the Checkup in the next cycle. The things that worked refine the Route. The capabilities that need more weight shift how Navigation is organised. Which brings us to the most important point about this model.

It's a Loop, Not a Cascade

If you take one thing from this article, take this: the NBT Growth Model isn't four stages that happen once, in order, at the start of an engagement. It's a continuous loop. Stage 4 feeds Stage 1 of the next cycle. The Checkup you do in Q2 is informed by the optimisation learnings from Q1. The Route you adjust in Q3 is shaped by what the Navigation showed you in Q2.

This is why we talk about the Growth-Driven Marketing Loop as one of the underlying pillars of the model. Linear growth planning, set a strategy, execute, report at the end, start again, is how most businesses run marketing. Looped growth planning, diagnose, route, navigate, optimise, and feed the next cycle, is how businesses that actually compound run it.

In practice, this means the four stages don't have clean edges in any given week. You're optimising current campaigns while reformulating part of the route based on what you just learned. You're running the Checkup on a new segment while still navigating the existing one. The loop is what keeps the system alive instead of dead-loading a strategy document every twelve months.

Linear growth planning is how most businesses run marketing. Looped growth planning is how businesses that actually compound run it.

How to Tell If Your Growth Is Running as a System

The fastest way to know whether your team is running the Growth Model or running a collection of tactics is to answer six questions honestly. If you can answer all six clearly, you're running a system. If you can't, you're running tactics, which is fine, as long as you know that's what's happening.

• Can you name the single biggest constraint on your growth right now, and the evidence that makes it the constraint? (Stage 1 discipline.)
• Can you describe your ICP in one paragraph that would exclude prospects who don't fit, not just include prospects who do? (Stage 2 discipline.)
• Does every marketing activity this week connect to a specific stage of a defined funnel, or are some activities running because someone suggested them three months ago? (Stage 3 discipline.)
• Do your quarterly OKRs cascade into weekly sprint commitments that your team could recite from memory? (Stage 4 discipline.)
• Do last quarter's learnings visibly shape this quarter's plan, or does each quarter restart from a blank page? (Loop discipline.)
• If your most senior marketer left tomorrow, would the system continue running, or would it stop? (System vs. dependency test.)

Most teams, asked honestly, struggle with at least three of these. That's not a failure. It's a diagnostic, and the first input into Stage 1 of your own loop.

When the Model Earns Its Keep

Not every business needs this. If you're running a proven playbook in a category you already dominate, the overhead of stage-based growth operation may be more structure than you need. The model earns its keep when any of these are true: you're post-round and deploying significant growth budget with limited time to find signal; you're entering a new market where your home-market playbook won't transfer; your growth has plateaued and you need to diagnose rather than just spend more; your team has grown beyond what a single operator can hold in their head.

Those are the moments where running growth as a system, rather than as a collection of smart tactics, stops being a nice-to-have and starts being the thing that determines whether you hit your numbers.

Where to Go From Here

If you've read this far and the honest answer to the six questions above is "we're not quite running this as a system yet", that's the common starting point. Most of the teams we work with arrive at NBT with strong execution capability but no connective tissue between strategy and weekly action. The work is usually less about adding tactics and more about installing the operating logic that lets the tactics compound.

If you want to talk through where your growth sits against the four stages, and where the real constraint is right now, get in touch for a strategy call. We'll walk through the diagnostic with you and share the honest view.