The B2B SaaS go-to-market operating system
Run your whole 'marketing agency of one' on one operating system.
The proven T2D3 method, every frontier AI model, and human specialists on demand — one subscription, one login, every client in its own workspace. AI doesn't replace the craft you spent a decade building; it replaces the four unbillable hours of re-typing context before every 20-minute call.
See a sample diagnostic → It's our own site's report — the same bar we'll hold your prospects to.
The problem
The solo tool stack is where margin goes to die
A fractional CMO runs strategy, content, design, web, and reporting for several clients at once. The default answer is a pile of tools that don't share context:
- Five AI subscriptions — chat, image, research, transcription, writing — each with its own bill, none knowing your clients
- A prompt library you maintain by hand and paste into a chat box one task at a time
- Client context scattered across docs, decks, browser tabs, and your own memory
- Deliverables that drift off-brand because nothing enforces the voice
- Hours of unbillable glue work between tools that were never designed to work together
Every one of those is context you re-type, money you re-spend, and judgment that never compounds. The tool stack is the ceiling on a one-person agency. T2D3 OS removes it.
Why now
Your client just ran your deliverable through Claude. What's your answer?
Every month the gap narrows between what generic AI produces and what your retainer buys. The fractional CMOs who stay premium in 2026 can point to a named method, a locked foundation, and a dated record of what changed — not a folder of decks. T2D3 OS builds that record while you work: it turns an experienced marketer's judgment into a repeatable, defensible, provable B2B SaaS engagement.
Run the diagnostic on your next prospect — free →Who runs on it
Built with fractional CMOs. Built for everyone who owns the number.
One method, one OS — whether your go-to-market is a book of clients or one company you're all-in on.
Fractional CMOs
Run every client engagement as an agency of one — separate workspaces, one login, white-label deliverables.
See how →In-house CMOs & marketing leaders
Give one company the full T2D3 playbook — the foundation, the plan, and the AI leverage of a team twice your size.
See how →Founders running GTM
No marketing hire yet? The OS is the method and the first marketer — you bring judgment, it brings the playbook.
See how →How it works
A proven method, an AI engine, and human experts — in that order
A method, not a blank chat box
The T2D3 methodology — the playbook behind hundreds of B2B SaaS engagements — is operationalized as modules that draft, cross-check, and update themselves from your client's locked foundation.
A maintained AI execution layer
Frontier models from Anthropic, OpenAI, and Google (and 12 other providers) — plus image generation — routed per task with prompts tuned for each job and your client's context preloaded. AI credits are included in every plan.
Human experts on tap
When a task needs a really good human — an experienced designer, a writer, a strategist, an engineer — buy exactly that from the marketplace, delivered inside your workspace. No hiring.
Why it works
Everything builds on a foundation you lock
For each client you establish the durable truths once — ICP, personas, value propositions, messaging, brand voice — with AI drafting from real evidence and you locking what's right. Every plan, page, and post the OS generates afterwards is grounded in that locked foundation, and shows you exactly which sources it drew on. Your judgment compounds instead of evaporating between tools.
How the foundation works →What's inside
Eight systems. One OS.
Each one replaces a tool you're paying for today — and they all share the same foundation.
GTM Foundation
ICP, buyer personas, value propositions, messaging, and brand — built once, locked with your judgment, and reused by every AI task after it.
T2D3 Playbook
The playbook modules from the T2D3 methodology — growth strategy, plans, scorecards, and budgets that draft themselves from your foundation.
Content Studio
From idea to on-brand draft — content that's grounded in your foundation and swept for brand-voice adherence after it ships.
Website & GEO
Audit any website against the T2D3 method, build landing pages from your foundation, and publish machine-legible pages that answer engines can cite.
AI Engine
57 models across 16 providers — and growing — behind task-tuned prompts, routed for the best outcome at the best cost, with credits included in your plan.
Command Center
Founders Cockpit, OKRs, dashboards, and reports — one place where you and your clients see status, progress, and what's next.
Team & Talent
When your clients grow past you: team assessments, development matrices, coaching tools, and calibration — the Level Up product, on the same platform.
Agency Workspace
Multi-client workspaces with clean separation, operator access across accounts, and white-label options — built for the agency of one.
Built for a book of clients
Every client gets an OS. You get one login.
Each client is its own workspace — own foundation, own playbook, own data — and you operate across all of them as an agency operator. Reports, dashboards, and white-label surfaces mean deliverables ship themselves.
$999/month for the whole practice — unlimited client workspaces, 35,000 AI credits included. About a tenth of a single $10K retainer. See the math →
The fractional CMO playbook →The expert marketplace
Four kinds of human superpower, on demand
Navigator for strategy. Scribe for narrative. Sculptor for design. Engineer for systems. You're world-class at one or two of these — the marketplace covers the moments that deserve a specialist in the others.
Meet the marketplace →People who run the method
“The most foundational shift I have experienced due to the T2D3 masterclasses is my new ability to step back, holistically assess a company's situation, and know where to aim their go-to-market strategy in a way that sets them up for success. I see how everything works together — the masterclasses have exponentially grown my marketing knowledge and allowed me to really feel like a B2B SaaS marketing expert.”
“I've used the T2D3 model to help my clients understand how they fit into the market and what their growth stage means for their goals. It gave me new language to get buy-in from executive teams to rethink their original direction in favor of efforts proven to be more effective for their products, markets, competition, and capabilities.”
104 certified members run the T2D3 method — including fractional CMOs Yusuf Mahmoud, Juan Del Hierro, Antoine Vial and 7 more. The certified directory →
The method comes from Stijn Hendrikse — co-founder of Kalungi, the leading fractional-CMO agency for B2B SaaS, and author of T2D3 — distilled from taking dozens of software companies from $1M toward $100M ARR.
Your next client meeting could open with their GTM diagnosis.
Run the free Website Compass on a prospect, start free on your first client workspace, and upgrade when the engagement lands.