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A solo founder at work
MK
AI writing tool · Porto, Portugal · backing since May 2026
Mostly experiments · 70 / 15 / 15growth · founder · platform

Nine months in, one person, no outside money. I publish what I try and what it costs.

Run byMara Koch
Money made each month€1–2.5K trending upManually verified · 29 Jul
People using it500–1,000 trending upManually verified · 29 Jul
Still there after two weeks35–40%Manually verified · 21 Jul
New customers each month25–50 trending upManually verified · 29 Jul
Customers lost each month5–10Manually verified · 29 Jul
Still there the next day70%+Manually verified · 29 Jul
Still there after a month20–35%Manually verified · 29 Jul

Weekly updates

27 Jul 2026Week 11

The email sequence is live and the first group is in

Three emails went out on Tuesday. 214 new sign-ups are getting them and 209 are not, so we can compare the two groups. Ana pointed out that the day-three send lands in the middle of the US morning; we are keeping the timing anyway so the comparison stays clean.

Idea from a backer · run by the founder
20 Jul 2026Week 10

July's experiment picked: onboarding emails

Four ideas came in, two made the shortlist. Backers preferred the email sequence over the pricing test, two to one, mostly because it is easy to undo. Budget locked at the whole pool.

Idea from a backer · run by the founder
13 Jul 2026Week 9

A quiet week, and the honest reason why

Support doubled after a forum thread and I spent most of the week answering messages instead of building. Money made each month stayed inside its usual range. No experiment ran, so there is nothing to report.

The founder's own update · nobody else's idea
The members’ room

Where backers and the founder talk.

Questions before the weekly call, arguments about which idea should run next, and the founder thinking out loud between updates. Open to anyone backing a solo founder, and closed to everyone else — including us, except where a decision it produced is published.

It opens with accounts. Until then there is nothing to sign in to and nothing to read, which is why there is no empty box here pretending otherwise.