Don't stop at the close: retain and expand

The fourth station is the one a pipeline-obsessed founder forgets, and it is the cheapest revenue you will ever earn. Winning a new logo costs you the speed advantage, the qualification, the cadence and a founder conversation; growing an existing account costs a fraction of that, because the trust is already built and the buyer already pays you. A pipeline that only ever points at new logos is a leaking bucket dressed up as a growth engine.

The same machine, pointed inward

The machine you just built does not stop at the close — it points inward just as well. The capture point becomes a usage signal; the qualification becomes an expansion trigger; the cadence becomes a check-in rhythm. AI watches for the moments worth a founder's attention — a team hitting a seat limit, adoption deepening, a renewal approaching — and surfaces them so you act before the buyer churns or outgrows you quietly. The how-to is in run customer success without a CS team and upsell and cross-sell triggers run by AI agents.

Expansion is a measured discipline, not a hope

Retention and expansion are not a vibe; they are a number. Grow net revenue retention is the station's scoreboard, and the signals worth wiring — feature-adoption depth, seat utilisation, the moments that predict a churn or an upgrade — are laid out in build expansion signals into your motion. For a solo founder, the move is the same as everywhere else in this playbook: let the machine watch the signals continuously, and reserve your scarce human hours for the handful of expansion conversations that actually move money.