What freemium means
The word combines "free" and "premium". The investor Fred Wilson made it known on his blog. On 23 March 2006 he described the model as his favorite: give the service away for free, acquire a lot of customers efficiently through word of mouth, referral networks or organic search, and then offer that customer base premium-priced value-added services or an enhanced version. He asked his readers for a name and settled on "freemium" the same day, a suggestion from Jarid Lukin of the company Alacra.
Wilson did not present the model as new. He wrote that it had been around for a long time, for instance in shareware, and that it worked even better with web services, where a customer is only a click away.
The term is clearer once you separate it from two related ideas: - A free trial gives access to the full or nearly full product for a limited time. When it ends, the user pays or loses access. In freemium, the free plan does not expire. What is limited is the scope. - SaaS is a delivery model: the provider runs the application in its cloud and the customer uses it in a browser. Freemium is a pricing model. Some SaaS is sold only on paid plans, and freemium exists outside SaaS, for example in mobile apps or in the shareware Wilson mentioned.
The two can be combined: a product can have a permanent free plan and also a time-limited trial of a paid plan.