Column · free tier
Usage without commitment. That is useful for measuring engagement and useless for measuring willingness to pay, because the population is defined by not paying.
A small fraction move to paid, and they are usually not the heaviest free users. Heavy free usage often means the free tier is sufficient, which is a design error rather than a customer success.
When the value is obvious only after use, and the paid step is a natural continuation rather than a wall.
When it substitutes for a price test. A free tier tells you people will use it; only a price tells you they will buy it.
See the data this is built on
Open the snapshot