T2D3
How Some Software Startups Scale, Where Many Fail
The definitive guide to scaling B2B SaaS from $1M to $100M ARR using the T2D3 growth framework.
The author
Books by Stijn Hendrikse.
The method behind T2D3 OS, in book form: how B2B SaaS companies scale, how humans create value in the age of AI, and the weekly cadence that makes both stick.
Stijn is a serial entrepreneur and marketing leader who has contributed to the success of 20+ startups as a C-level executive — Chief Revenue Officer of Acumatica, CEO of MightyCall, and the initial global go-to-market for Atera, a B2B SaaS unicorn. Before startups, he led global SMB marketing and B2B product marketing for Microsoft's Office platform. He founded Kalungi, the B2B SaaS marketing agency behind the T2D3 methodology, and now builds T2D3 OS.
Syntropy
How Humans Create Value in the Age of AI Entropy
Create Signal, align teams, sharpen go-to-market strategy, and build marketing systems that create clarity instead of chaos.
Finish Line Fridays
Weekly Practices for Sustainable Achievement
A practical system for turning weekly reflection into consistent progress and sustainable high performance.
Spending $2 to make $1
A CFO's Guide to B2B SaaS Marketing Investment
Bridge the gap between marketing and finance with data-driven frameworks for B2B SaaS marketing investment decisions.
Level Up
Growing People and Teams in the Age of AI
A field guide to leveling up people and teams — growing roles, skills, and careers in an AI-leveraged world.
Coming soon
The books are the method. The OS runs it.
T2D3 OS operationalizes the playbooks from these books into working, AI-assisted modules — start free.