Which parameters can be used to set up a freemium model in Stripe?

In a freemium model, businesses typically offer a basic version of their product for free while charging for advanced features or additional usage. The parameters "trial_end" or "trial_period_days" are specifically designed to facilitate this kind of model in Stripe.

Using "trial_end," you can specify a timestamp indicating when a free trial period will end, after which the user is either charged or their access is limited. "trial_period_days" allows you to define a duration in days for the trial period. Both of these parameters enable you to manage the transition from a free offering to a paid service effectively.

The other options presented do not align with Stripe's established parameters for setting up a freemium model. "free_trial" and "paid_conversion_days," for instance, are not standard parameters in the Stripe API. Similarly, "onboarding_period" and "initial_discount," as well as "monthly_fee" and "yearly_discount," do not correspond to the fundamental tools needed for defining a freemium structure through Stripe. The primary focus on "trial_end" and "trial_period_days" highlights how Stripe directly supports the mechanisms needed to manage user transitions from free to paid usage.