Thesis is a place where people pay a solo founder monthly, suggest one experiment for them to run, and read what happened — good or bad. This is one of those results.

Ana Ribeiro
Getting people to keep using small subscription apps after they sign up.
Backs 3 founders and runs one of their own. Both sides of this are the same account, on purpose — a record split across two profiles is not a record.
Ten years doing it in-house, now on her own. Lisbon.
As a backer
Who they back.
- A solo founderAI writing toolSince Jul 2026
- KerningTypography QA for design teamsSince Jul 2026
- HalyardSailing weather routingSince Jul 2026