4T2
Language: English
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You have the idea. We build it with you.

An AI-native venture studio run by two brothers. We build a company that can scale, together with you.

Contact us
  • Not an agency
  • Not an accelerator
  • Not a fund

A partner who builds with you

Experience from

A studio that builds with you, not one that only advises

Partnership what you get, what we ask
  • P
    Product We build the first version with you, and keep improving it.
  • G
    Growth We set up the engine that brings in customers.
  • S
    Sales Strategy, sales and deals, from the first customer to scaling up.
  • AI
    AI-native way of working A small team that works like a big one.
In return We take equity in the company If the company grows, we grow with it. So we both want the same thing.

From first call to first customers, in weeks

  1. Week 0

    Intro call

    You tell us about your idea and your ambition. We listen, ask sharp questions and tell you honestly whether and how we can help.

    Intro call example timeline

    Questions we will ask

    • Who has this problem, and how often?
    • How do they solve it today?
    • Why are you the right person for this?
    • Where do you want to be in three years?

    Outcome: an honest answer, even if it is no

  2. Weeks 1 to 2

    Validate

    With AI-assisted research and fast experiments we test whether there is real demand, before much time or money goes into it.

    Validate example timeline

    Experiments

    • Conversations with your audiencesummarised
    • Market and competitorsmapped
    • Test page with the offerlive
    • Sign-ups and reactionsmeasured

    Outcome: keep building or change course

  3. Weeks 3 to 6

    Build

    Together we develop the first version of the product and set up the first sales and growth engine.

    Build example timeline

    Two tracks at once

    Product

    • The core of the product
    • AI where it saves work
    • First users on board

    Sales and growth

    • Offer and pricing
    • Sales approach
    • First channels

    Outcome: a first version people actually use

  4. From week 7

    Launch and scale

    We take it to market, land the first customers and grow with you. As a partner with equity, not as a supplier.

    Launch and scale example timeline

    From first customer to growth

    1. First customers, won in person
    2. Measure what works, do more of it
    3. Team and processes ready to scale

    Outcome: paying customers and a plan to grow

Launch day.

A rocket on its launch pad counts down from three, ignites, lifts off and climbs out of sight, leaving a trail of exhaust.

Try it

Type your idea. See how we would approach it.

Or try one of these:

Your plan appears here, in four steps.

Two brothers, two sides of a company

Thibaud the side that sells
Thibaud De Keyzer at a company event

Thibaud De Keyzer

CEO and operator

15+ years scaling B2B software across Europe, with multinational experience alongside SAP and IBM. As CEO of Mobilexpense he turned an expense tool into an intelligent spend management platform. Before that he ran Flexso in the Netherlands, and founders and investors like TechWolf and Fortino Capital bring him in to scale.

  • Former CEO, Mobilexpense
  • Managing Partner NL, Flexso
  • Multinational experience with SAP and IBM
  • Board advisor: TechWolf, LetsBuild, SupplyStack, AiVidens
  • Strategic advisor, Fortino Capital
  • Vlerick, KU Leuven, MIT Sloan
Thibaud on LinkedIn
Tanguy the side that builds
Tanguy De Keyzer smiling, making a peace sign

Tanguy De Keyzer

Product and growth

15+ years building growth for SaaS companies. Through his growth studio Customer Impact he builds the growth engines behind B2B SaaS teams like Aikido Security, Suivo and Kaizo: positioning, demand generation and conversion, plus generative engine optimisation so AI tools recommend them.

  • Founder, Customer Impact
  • Aikido Security
  • Suivo
  • Kaizo
  • Tryve
  • Get Driven
Tanguy on LinkedIn

We invest in what we believe in

Skin in the game is not a slogan. These are companies we backed with our own money.

What AI-native looks like for us

Our way of working is AI-first

That is how a small team does what would otherwise take a big one.

research

Market picture, competitors and customer conversations summarised, so we know sooner where we stand.

Designed AI-native

We don't add AI to a classic company. With every idea we ask: how would you build this if AI is the default?

Faster to market

Validation, first version and first customers in weeks, not months.

validation, week 1 (example)

  • Market and competitors mapped
  • Audience conversations summarised
  • Test page live
  • First sign-ups measured

Decision: keep building or change course

This site too

Built the same way. Ask your question through the palette.

What we look for

Not a sector, but a kind of person and a kind of idea. Tick what sounds like you.

Founders who
Ideas that

0 of 8

No startup experience? No problem. Most good ideas come from people who know their trade.

You bring the idea, we bring the execution

A first conversation is free and without obligation. Tell us in a few sentences what you have in mind, we reply personally.

What do you want to build, and for whom?