An AI cofounder is an autonomous system that owns a business function end to end — it decides without being asked, acts on those decisions, and is accountable for an outcome you can measure. That is what separates it from an AI assistant, which answers when questioned, and a tool, which waits to be used.
The three tests
A tool waits for input. A cofounder has a standing brief and starts work on its own cadence.
Recommending is not owning. It ships, pauses and reallocates inside limits you set.
Not activity — outcome. Cost per customer, revenue attributed, something you would put in a board update.
FAQ
An agent is the mechanism; a cofounder is the job. Most agents complete a task you hand them. A cofounder owns a function continuously and reports on an outcome.
No. It cannot hold equity, sign, or be liable. The word describes how it works — owning a function end to end — not a legal status.
Marketing is the function that fits first, because the feedback loop is fast and measurable. Sales and support are further behind, mostly because the consequences of being wrong land on a person.
It replaces the volume work a hire spends most of their week on. It does not replace the judgement calls — positioning, pricing, partnerships — that need someone carrying the consequences.
Founding cohort seats include the first month and a written teardown of your current funnel.
Claim a seat100 seats. No card. We tell you on day 14 whether it worked.