FlatNine Blog

Mike Rubini Mike Rubini / Mar 24, 2026

What is work?

Most entrepreneurs ask one question: does this make money? The better question is: does it make money, and does it give me back my time? This article introduces a formula that makes the answer precise.

Read more →

Every product I run shares the same plumbing

By Mike Rubini Sep 10, 2026
Read more →

I fitted a 1969 diffusion model to eight years of signups

By Mike Rubini Sep 8, 2026
Read more →

I do not market my products, I market the gap between other people’s

By Mike Rubini Sep 6, 2026
Read more →

I built a correlation matrix over my own life, part 2

By Mike Rubini Aug 28, 2026
Read more →

I built a correlation matrix over my own life

By Mike Rubini Aug 21, 2026
Read more →

How AI handles my email before I read it

By Mike Rubini Jun 14, 2026
Read more →

I built my own Claude eval

By Mike Rubini Jun 9, 2026
Read more →

The self-improving company

By Mike Rubini Jun 2, 2026
Read more →

I built a machine that watches what the best builders star

By Mike Rubini Jun 2, 2026
Read more →
← Previous
123...18
Next →

FlatNine Blog

Building profitable software businesses

Links

  • Company

© 2026 FlatNine Blog. Powered by Flat9. All rights reserved.