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996 newsletters · 2,396 this month

Product Market Fit newsletter by Guillermo Flor: latest issues, cadence and price

by Guillermo Flor · Substack · Free and paid · 5 a week · last issue Nov 6, 2026 · Active

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Daily high-signal content on how to build, grow and fund startups in the AI era.

Fri Nov 61 issue

Thu Nov 51 issue

Wed Nov 41 issue

Tue Nov 31 issue

Mon Nov 21 issue

Fri Oct 301 issue

Thu Oct 291 issue

Wed Oct 281 issue

Tue Oct 271 issue

Mon Oct 261 issue

Thu Oct 221 issue

Wed Oct 211 issue

Tue Oct 201 issue

Mon Oct 191 issue

Sun Oct 181 issue

Fri Oct 161 issue

Thu Oct 151 issue

Wed Oct 141 issue

Tue Oct 131 issue

Mon Oct 121 issue

Sun Oct 111 issue

Sat Oct 101 issue

Fri Oct 91 issue

Thu Oct 81 issue

Wed Oct 71 issue

53 issues on file since Sep 2, 2026; every one is in its own archive ↗.

About this newsletter

Free or paid

Free and paid on Substack. 92% of its latest 12 issues are for paying subscribers (from its public archive, checked weekly).

Issues per week, last 26 weeks

5 a week, measured over the last six months (or since the feed's oldest issue)

Issues by month

Writes about

AI and agents (32), Product and growth (11), Tech business and strategy (9) in the last six months.

More on ai and agents

History

Listed on Newsletters Sep 25, 2026. No changes to its feed, price, platform, status or cadence since.