Open the markets.Close the deals.
I build your sales motion in five days — the messaging, the sequences, the materials, and Gabriel, my agent. Then I stay and run it with you, inside the team. For consulting firms and B2B SaaS that have outgrown the way they sell.
From a first call to a motion that runs.
The stack I install — best-of-market, set up for you
B2B sales engines
end to end
one method
Your whole sales motion, built in five days.
The messaging, the sequences, the sales materials, the content — built around your business, in your voice. Yours to keep.
See everything in the kitAnd Gabriel — the agent
Gabriel is my agent, on your Claude. He writes your outreach, tracks your pipeline, ramps your reps — and teaches you to use him. New modules extend him over time. You keep him.
Meet Gabriel20+ engagements across Europe and Southeast Asia.
A detailed look at six — consulting firms and B2B SaaS that opened new markets and built the channels behind their growth.
We'd been talking about fixing sales for two years. Guillaume came in and did it. Within a few weeks we had a real pipeline and a process the team could run on their own.
Client names withheld at their request — described by sector, region and stage instead. Specific revenue figures and named quotes are layered in as clients clear them for use.
A revenue leaderin the work —
I help consulting firms and B2B SaaS grow past the sales motion that got them here — and I do it from inside the team, not from a deck.
The kit runs in five days. I stay on for as long as it's worth it.
The kit gets you moving; the results come from running it. So I stay on — pipeline, campaigns, closing.
One dial, set with you
Whatever the setting
- Your pipeline, read every week
- Your campaigns, live and iterated
- Your kit current — Gabriel growing, module by module
A day rate, a monthly retainer, or a rate plus a share of what we close — set with you, never off a price list.
A track record built on closed revenue.
I'm Guillaume Berrehouc. I don't write strategy decks and walk away — I sit next to your team and do the work.
Before GXB, I grew a family B2B business 50% over 4 years until we sold it. The decade since: B2B sales operations across 4 countries (France, Luxembourg, Belgium, Singapore), $15M+ closed, deals with most major international banks and CAC40 groups.
20+ engagements end to end since 2022 — consulting firms and B2B SaaS scaling past the original sales motion.
A decade of building revenue.
Across consulting, financial services and industrial B2B — in Europe and Southeast Asia.
Head of Business Development — Europe & APAC — Azzana (Finegan Group)
Dec 2020 — July 2022Won places on 15 procurement panels for financial institutions and listed companies, trained 150+ consultants ahead of their CAC40 interviews, and led commercial teams across France, Luxembourg, Belgium and Singapore.
Senior Business Manager — 99 Advisory (Finegan Group)
Jan 2020 — Dec 2020Opened a new corporate vertical from scratch.
Head of Business Development — REGUANN (family business)
Jan 2016 — Jan 2020Grew the business steadily over four years, leading to a successful exit.