Software-as-a-service companies are known for their explosive revenue growth. Given the ongoing migration from on-premise to the cloud, these revenue trends are sustainable. Below are some of the best SaaS stocks to buy and hold.According to Orlando Bravo, one of the most successful technology investors, software is the best business in the world. The industry has higher growth rates, recurring revenues and best-in-class gross margins. Considering the success of Thoma Bravo, it is worth paying closer attent ...