Your market does not understand what you do. Measured in 48 hours, fixed in two days.
Fast Growth Advisors is the Message-Market Fit firm. We measure the clarity of your message, then rebuild it with you: audit in 48 hours, repositioning in two days on average, one week at most. For post-funding B2B startups and scale-ups, in France and across Europe.
Tailored engagements. Free diagnostic, no commitment.
The shortest test
“ Your startup simplifies your workflow management with AI. ”
Always true. Whatever the name in the sentence.
If your competitor’s name fits in your headline without anything changing, your message does not explain why you and not your competitors.
The problem
Can you explain who you are in 30 seconds?
Four sentences. Thirty seconds. If your CEO, your VP Sales and your CMO tell three different stories, your pipeline is already paying for it: longer cycles, prospects who need to think about it, weaker competitors who close because they are clearer.
The problem is almost never the product. It is the message carrying it. And a message can be fixed.
The orchestration platform for data-driven teams
Automate your business workflows
Actually, it is a bit like Zapier, but for…
We signed with the other one. It was clearer.
Our point of view
Here is what we answer, in 30 seconds.
Who we are. Fast Growth Advisors, the Message-Market Fit firm for European B2B startups and scale-ups.
What we do. We measure your Message-Market Fit, rebuild your message with your teams, and keep it sharp over time.
What sets us apart. A messaging methodology industrialised by our own AI software. We build our tools, we do not just consult.
The value. A message your buyers and the AI engines grasp in ten seconds: shorter sales cycles, a pitch your whole team repeats word for word by week two, an offer ChatGPT and Perplexity know how to cite.
Client case study
Client case study: Coptos, a positioning found in one day
Coptos, professional reprographics in the Paris region. Positioning found in one day of work, message and website fully rewritten in two weeks.
The slogan test, before and after
“Welcome to Coptos. Printing technologies at your service.”
Swap Coptos for any competitor’s name: the sentence still holds.
“Technology for your deadlines. Craftsmanship for your impact.”
Print Compliance for sensitive documents, Reprography as a Service for recurring volumes, 30 years of expertise near Paris.
“In one day, we could finally say why Coptos and not someone else. Two weeks later, the whole website said it. Reprographics is not tech: if the message problem exists in our industry, it exists everywhere.”
Denis Altuna, President, Coptos · Professional reprographics, Paris region
The value
What changes when your market understands you?
A clear message is one the market repeats without you. What changes is not your product: it is what your buyers take away, and what they say about it in turn. Five places where the gap shows.
Vp sales
Your sales cycles
The prospect hesitates, shops around, postpones.
They understand and they buy: shorter cycles, more deals won.
CMO
Your marketing campaigns
Every euro amplifies the vagueness, costs climb.
Every euro carries the same message: more qualified leads, a lower cost per lead.
CEO
Your teams
Three versions of the pitch, a pipeline that pays for it.
One story from CEO to sales rep: fewer deals lost, a reliable forecast.
Analysts and press
Analysts and the press
No shortlist, no citation, no coverage.
Quotable, therefore quoted: press coverage, inclusion in analyst research (Gartner Magic Quadrant, Forrester Wave).
Investors
Your investors
Doubt sets in at the worst moment.
The thesis lands in one sentence: due diligence shortens, the round closes.
What message clarity changes for the valuation of your portfolio companies →
In the press
Les Échos · July 20, 2026
“AI-written LinkedIn posts and press releases: a false good idea for startups?”
Article by Thomas Pontiroli, drawing on Observatory data. See our press coverage
Trusted by
Among the companies that have trusted us to clarify their message and take it to their market are Edenred, Alphabet, Atakama Technologies, BICS (via Starsight), Coptos, Lengow (via Starsight), ABVV Groupe, Lifen (via Starsight), Sense4data, Upsun (via Starsight), UNJPT, Prestige Racing, HACS Restauration and La Voie Agile. The words « via Starsight » indicate the assignments we carried out together with Starsight.
Who we work with
Who do we work with?
The post-funding CEO. You convinced investors. Your market is still hesitating. You want a story that holds in the boardroom and in front of customers.
The VP Sales. Every rep tells their own version. Cycles stretch, and deals are lost to weaker but clearer competitors. You want a pitch the whole team repeats word for word.
The CMO. The website says one thing, the decks another, and the AI engines retain none of it. You want a message that holds across every channel, human and machine.
We also work with investment funds on their portfolio companies. It is a dedicated offer: Investor Advisory.
The 2026 observatory
What does the Message-Market Fit Observatory 2026 reveal?
5.33 / 10
average message clarity score of French post-funding startups
75.9%
share of startups below the critical clarity threshold
18%
average level of AI visibility readiness (GEO)
In other words: three prospects in four understand neither what you do, nor why you rather than someone else. They will never tell you. They will look elsewhere.
We audited 369 French post-funding startups with our own analysis technology to prove it. The most counter-intuitive result fits in a single chart.
Messaging performance by sector
129 startups · 8 sectors · bubble size = audited volume
Reading · Biotech raises €18.5M on average and scores 4.58. FinTech raises €17.3M and scores 5.81. At comparable amounts, the gap is massive: the amount raised does not improve message clarity. Source: Fast Growth Advisors Observatory Q2 2026.
How we work
How do we work together?
The Messaging Audit
15 messaging criteria, 5 layers of AI visibility, interviews with your leadership team. Full report delivered 48 hours after the interviews. €3,000.
Discover the audit →Message-Market Fit consulting
A complete repositioning of your message in 2 days on average. Then we guide its deployment everywhere it plays out: website, sales deck, content, acquisition.
See how we work →Testimonials
What our clients say
Fast Growth Advisors rebuilt Coptos’ positioning in 1 day, against 2 days on average.
The testimonials below speak to the method, not to an isolated deliverable.
“Strategies are like opinions. It seems everyone has one. However, successful strategies require taking a risk and defining clear paths to execution. Working with Herve over a couple of decades has demonstrated his ability to improve most tech strategies and more importantly make them executable.”
CEO, Global Marketing Agency, UK
“Philippe demonstrated enormous resourcefulness and creativity, imagining new and innovative approaches to business development.”
Chief Commercial Officer, Global Telco
Investors
Do you invest in B2B startups?
The Message-Market Fit of your portfolio companies is a measurable asset, and it is almost always overestimated. We build packaged offers for business angel networks and funds: portfolio audits, message rebuilds, follow-up.
Our software
Why does a consulting firm build its own software?
Because our method does not fit in slides. Our audits run on our own AI technology, the one that analysed 369 startups for the Observatory. We also publish NOMO IA for content production, Plein Phare Digital and QRCodeBTP. When you work with us, you are not buying a report: you are plugging proven tooling into your growth.
Blog
Latest posts
AI Overviews: 23.1% Fewer Clicks in France, and a Blind Spot No One Measures
Google’s AI Overviews are cutting B2B clicks in France (−23.1%). Why the click is no longer the unit, and how to become the source AI cites.
Read the article : AI Overviews: 23.1% Fewer Clicks in France, and a Blind Spot No One Measures →Your site isn’t invisible to AI. It’s unreadable.
An AI engine can say what your company does, not what sets it apart. The three stages where your positioning vanishes, and the thirty-second test.
Read the article : Your site isn’t invisible to AI. It’s unreadable. →876 impostors: what your AI traffic really hides
Over thirteen days, 876 of 1,129 visitors claiming to be AI were lying. What identity verification changes about your error rate and your referrals.
Read the article : 876 impostors: what your AI traffic really hides →Ready to measure your Message-Market Fit?
We start with a conversation, not a 47-slide audit. Just a discussion to understand where you stand and what is blocking you.
Book my free diagnosticFAQ
Frequently asked questions
What is Message-Market Fit?
It is your message’s ability to be understood, remembered and bought by your market, just as product-market fit measures how well your product fits. It is measured across 15 criteria, from positioning clarity to visibility in AI-generated answers. In the Message-Market Fit Observatory, the average score across 369 French post-funding startups is 5.33 out of 10.
What is the difference between the free diagnostic and the audit?
The free diagnostic gives you a first signal on your message clarity in minutes. The audit goes deep: 15 criteria, 5 layers of AI visibility, leadership interviews, a full report and action plan delivered within 48 hours, for €3,000. The first needs no conversation, the second starts with a scoping interview.
How long does it take to reposition a message?
2 days on average for the positioning and message rebuild. Deployment follows, driven by your teams with our guidance: website, sales deck, content, campaigns. You get usable deliverables from week two, never a recommendations report waiting for its turn. One week is the ceiling.
Do you only work with startups?
No. We work with B2B startups and scale-ups, from pre-Series A to established scale-ups, as well as investor networks that want to measure and strengthen the message of their portfolio companies. The approach assumes a working product and first customers, not a search for product-market fit. Both are decided case by case.
Why does my message need to convince AI engines too?
Because a growing share of B2B buying journeys starts with a question asked to ChatGPT, Perplexity or Gemini. If AI engines do not understand what you do, they do not cite you. Your message must be clear for a human and extractable for a machine.