Best Cloud CRM brands

Hi all! I am torn between many options available to me regarding the cloud CRM brands. There are free ones and there are also premium (paid) programs, each proposing their own value. I am planning to start a really small company that will play around small to medium-sized data. Can you guys propose some of the known free plans and paid options where I can place my cloud storage but also include customer relationship functions as well? What’s trending right now?