Pieter

Pieter

How to do Cohort Analysis in Excel?

Running cohort analysis in Excel gives you a clear view of how user groups behave over time, letting you spot retention trends and product issues early. This guide shows how to build a simple yet powerful Excel model that turns…

What Early Activation Should Look Like for Your Startup

Often when founders experience sluggish growth they believe they have a “product” problem, while instead they have an “activation” problem. Early activation isn’t about vanity signups — it’s about identifying the first meaningful actions that signal real traction and forming…

What are the 4 levels of PMF?

TL;DR Dive deeper in this topic with AI: ChatGPT Perplexity Grok Why PMF levels matter When you name the level you’re at, you stop comparing your seed-stage app to a unicorn’s metrics and start setting the right goals for the…

What is the meaning of Product-Market Fit?

Early-stage founders often feel stuck: growth is choppy, word‑of‑mouth is weak, and users try the product but don’t come back—leaving you wondering if you’ve hit product-market fit or just a briefly exciting launch. TL;DR Dive deeper in this topic with…

How to Use User Retention to Find Product-Market Fit

Early-stage founders often chase growth, but the real signal of Product-Market Fit hides in your retention data. When your curve flattens, you’ve found users who can’t live without your product. Learn how to track retention, spot your ideal customers, and use early user data to reach PMF faster.

How do you know if you’ve got Product-Market Fit?

If you ask founders how they knew they got Product-Marktet Fit, most often they tell you: “I just felt it”. That’s great for them, but not usefull for you if you are desperately looking for signals of PMF. TL;DR Dive…

What is the 40% rule for Product-Market Fit?

When you are building a new product or service, it is important to quickly learn if you are building a vitamin or a painkiller. The 40% rule for product‑market fit is a simple way to cut the noise and get…