About
From the T2D3 playbook to an operating system
T2D3 OS is built by the team behind T2D3 — the go-to-market methodology from Stijn Hendrikse's book of the same name, developed across hundreds of B2B SaaS engagements at Kalungi, the fractional-CMO agency he co-founded.
The thesis is simple: marketing organizations drown in noise. Every new AI tool makes producing more easier; none of them make it truer. T2D3 OS is built on the opposite bet — that the durable assets are a locked foundation of human judgment (who you sell to, why you win, how you sound), and that AI should execute from that foundation, visibly grounded in it.
We call that model Syntropy: humans supply judgment, AI supplies leverage, and the system is designed so the whole gets more ordered over time — not noisier. The four crafts the OS and its marketplace work in — Navigator, Scribe, Sculptor, Engineer — come from that model.
The books behind the OS
Responsible AI, by design
AI regulation is evolving fast, and we think that's a good thing. We're proud to make sure T2D3 OS does everything needed to follow the legal requirements as they evolve — because rules that keep AI honest keep the world safe and productive, and keep the trust your brand runs on intact.
In practice that means the OS builds compliance in rather than bolting it on: every AI-generated image carries machine-readable provenance (which system made it, and when), websites published from the OS ship an AI-disclosure manifest that meets the EU AI Act's transparency requirements (Article 50, in force August 2026), and every customer gets a one-click, human-readable disclosure label for their own sites — with our recommendation to disclose what the law requires in the markets where they do business.
Talk to us
The fastest path is inside the product — every page has help and expert-help built in. For everything else, email us and a human answers.
hello@t2d3.clubThe method is in the books. The leverage is in the OS.
Start free and see the T2D3 playbook working on your own go-to-market.