The Who / What / Diff / Value framework is the B2B messaging grid Fast Growth Advisors uses to move a startup from an improvised pitch to a structured story. Each axis answers a question the prospect is already asking, in the order they ask it. The goal: anyone in the company can pitch the value proposition in 4 sentences and 30 seconds.
Why don’t existing B2B messaging frameworks work in practice?
Because they demand time that startups don’t have, even though the literature is extensive: StoryBrand, Value Proposition Canvas, Jobs-to-be-Done.
Yet most of the B2B startups Fast Growth Advisors meets still have no structured B2B messaging.
Our measurements point the same way.
In the second quarter of 2026, the Fast Growth Advisors Observatory recorded an average score of 5.33 out of 10 across 369 French post-funding startups, a sign that knowing StoryBrand or Jobs-to-be-Done isn’t enough to produce a clear message. The Observatory methodology explains what that score measures.
Priority, rather than method, is the blocker. Academic frameworks demand two-day workshops, sticky notes and a certified facilitator. At a growth-stage startup nobody has that time, so messaging stays permanently “on the to-do list”.
Hence the idea of a tool that fits on one page, validates in 30 seconds and deploys the next day.
How does the Who / What / Diff / Value framework work?
It rests on 4 questions, asked in an order that mirrors the cognitive sequence a prospect follows when evaluating a solution.
In the Fast Growth Advisors methodology, that order is anything but arbitrary.
Who: who are you speaking to, precisely?
Not “B2B companies”, not “innovative SMEs”. Specifically: which job title, which company size, which daily problem, which decision moment. Precision on this axis determines the relevance of everything else, because messaging that tries to address every possible buyer at once ends up speaking to no one.
What: what do you do, in terms your prospect understands?
Usual temptation: describe features. Resist it. This axis expresses the transformation, what changes in the customer’s life after using your solution. A prospect isn’t looking for “a semantic analysis engine powered by advanced natural language processing”; they want to “understand what their customers actually think”.
Differentiator: why you and not a competitor?
This is the hardest axis, and the one most often botched.
“Our team is passionate” differentiates nothing, since 100% of your competitors could write the same sentence. A real differentiator is structural, verifiable and hard to copy. Proprietary data, a unique methodology, exclusive market access, a technical integration nobody else offers: the forms vary.
Value: what measurable result does the customer get?
Numbers, timelines, percentages. “Reduce your sales cycles by 35%” convinces more than “improve your commercial efficiency”. Without that anchor in the concrete, your messaging remains a claim floating in mid-air.
How do you validate your four sentences with the Point of View test?
In about a minute: write your messaging as 4 sentences, one per axis, and have someone unfamiliar with your company read them.
Can they reformulate what you do, for whom, and why it’s different? In under 30 seconds?
If yes, your messaging works. If they hesitate, rephrase or ask clarifying questions, there is work to do before anyone touches the website.
A concrete example, for a fictional cybersecurity startup:
Who: chief information security officers (CISOs) at mid-market industrial companies (200 to 2,000 employees) managing connected OT environments.
What: a platform that detects threats on industrial networks in real time, without disrupting production.
Diff: the only solution covering IT and OT simultaneously with a single agent, where competitors require two separate deployments.
Value: detection time reduced from 72 hours to 15 minutes. Deployment in 5 days, not 5 months.
Four sentences, thirty seconds, and no ambiguity left.
At Fast Growth Advisors, these four sentences have a name: the Point of View. It is the first deliverable of our Message-Market Fit consulting, and the B2B version of a positioning statement.
Which mistakes should you avoid, and how do you deploy the framework in eight weeks?
Confusing messaging with a tagline, writing for yourself, seeking consensus: those are the three errors that keep coming up in the startups Fast Growth Advisors advises.
First trap, the tagline. It is only the tip of the iceberg. Messaging is the underlying structure that feeds the tagline, the pitch, the website, the emails and the presentations. Working on one without the other is decorating a house that has no foundation.
Second trap: writing for yourself. Tech startups love talking about their technology, while the prospect wants to know what it changes for them. Every sentence in your messaging, from the homepage headline to the last slide of the sales deck, should survive the “so what?” test: if the prospect can read it without feeling concerned, it’s dead weight.
Third trap, and a sneakier one: seeking consensus.
Effective messaging makes choices. It excludes audiences, commits to a positioning angle, takes sides. Some prospects should read your site and think “not for me”. A good sign, actually.
Which leaves deployment, in three phases.
Weeks 1 and 2, the diagnostic: interview the founder, the sales team and 3 to 5 customers, then compare what the company says with what the market understands. This is often where the surprises live.
Weeks 3 and 4, construction: fill in the 4 axes, test formulations, iterate until you have 4 sentences that pass the 30-second test.
Weeks 5 to 8, deployment proper. Website, pitch deck, sales training, marketing content: everything aligns on the four sentences. It is the longest phase, and the most neglected, because a brilliant framework that stays in a Google Doc is worth nothing.
Relative to the impact, the time investment is modest: measurable results within 8 to 12 weeks, with shorter sales cycles, better conversion rates and faster commercial onboarding.
FAQ
Does the WHO/WHAT/DIFF/VALUE framework work for all B2B sectors?
Yes, this framework is sector-agnostic.
The Who / What / Diff / Value framework has been tested in SaaS (software as a service), cybersecurity, data infrastructure, professional services and deeptech. From one sector to the next, the four-axis structure stays the same and only the content changes, which is why a deeptech founder and a SaaS founder can run the same 30-second test.
Do you need a consultant to apply this framework?
Not necessarily: it is designed for self-service use.
An outside perspective does help avoid the main messaging bias, which is writing for yourself rather than for your market. Founders know their product too well to see where a first-time reader gets lost. For a free first opinion, the messaging diagnostic by Fast Growth Advisors reads your public pages and scores your message on 8 dimensions.
How do you adapt the framework for international markets?
The structure stays identical, but two axes get recalibrated.
Personas vary from one market to another, which means revisiting the Who. Value changes its wording, because the metrics that matter differ between France, Germany and the US. For international B2B messaging, translation alone is never enough: a sentence can be perfectly translated and still miss what a buyer in Germany or the US needs to hear.