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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
Your standing with a solo founder

You are not backing them yet, so you are seeing the public version of this page.

Reader€8
  • Read every idea people have suggested, in full, including how each one would be measured.
No backers yetNot open yet — this founder has no payment account connected, so no tier here can be bought today.
Supporter€20
  • Everything in Reader
  • Whatever the founder chooses to show beyond the public ranges.
  • Named on the results you paid for, if you want to be. Credit, not a claim on anything.not built yet

Marked promises are not built yet. The pilot has no accounts, no ballot, no calendar and no second payment path, so anything needing one of those cannot be delivered however much you pay — if a founder honours it, that is them doing it by hand. We have left these on the tiers rather than quietly removing them, because deleting a promise would hide the gap from anyone who had already paid for it.

No backers yetNot open yet — this founder has no payment account connected, so no tier here can be bought today.
Editor€45
  • Everything in Supporter
  • A vote on which idea runs next. The vote advises; the founder still decides.not built yet
  • Write up the experiment you think will work — the claim, the budget, and how it gets measured. The founder still decides what runs, and your name is on it either way.not built yet

Marked promises are not built yet. The pilot has no accounts, no ballot, no calendar and no second payment path, so anything needing one of those cannot be delivered however much you pay — if a founder honours it, that is them doing it by hand. We have left these on the tiers rather than quietly removing them, because deleting a promise would hide the gap from anyone who had already paid for it.

No backers yetNot open yet — this founder has no payment account connected, so no tier here can be bought today.
Editor at large€90
  • Everything in Editor
  • A seat on the founder's weekly call, with questions submitted in advance.not built yet
  • You can put extra money behind an experiment that has been picked, if the founder agrees to it. It goes straight to them, the same way your monthly payment does, and it earns you no more of a return than that one does.not built yet

Marked promises are not built yet. The pilot has no accounts, no ballot, no calendar and no second payment path, so anything needing one of those cannot be delivered however much you pay — if a founder honours it, that is them doing it by hand. We have left these on the tiers rather than quietly removing them, because deleting a promise would hide the gap from anyone who had already paid for it.

Co-funding contributions are separate one-off payments to specific approved experiments. Each one requires the founder's approval, and none is refundable once the experiment runs.

No backers yetNot open yet — this founder has no payment account connected, so no tier here can be bought today.
Founder's circle

Not for sale, at any price, today. If ownership ever becomes legally possible, this is where that conversation would start.

Joining the waitlist gets you an email. It is not an option, a promise, or a queue position.

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Loyalty earns recognition and access only — a badge on your name, earlier access to call seats. Cancelling resets the streak; it never affects money already spent.

What backing them adds to this page
  • What is left after costsLocked
  • Months of money in the bankLocked
  • Share of money from the biggest customerLocked

Named, not hidden. A page that concealed the existence of these would be presenting itself as the whole story; a page that showed them would make the tier meaningless.

Thesis never holds your money — the founder's own payment provider collects all of it, and we check how the experiment share is spent. The 15% platform line is what running this site would cost. There is no way to collect it during the pilot, so today that share stays with the founder too.