Unicorns that achieved $1bl valuation in less than 2 years

Our world is developing very rapidly, and for those who do not know, we are in the beginning of the 4th Industrial Revolutions. It is very interesting to see how the technology is developing so rapidly that even our grandparents already use it. It is all about technology today, all big companies and start-ups are trying to bring new technology into operations and create a new environment. In this article I want to introduce three interesting companies that became unicorns in less than 2 years. Unicorn is a startup company that is valued more than $1 bl.