Hello there, what I have been using is Airtable.

Not exactly a CRM but it's quite perfect. You could use the templates (https://airtable.com/templates) or copy some of the Airtables made public: https://airtable.com/universe

You can create forms as well, so it makes it easy to keep all the data in one place. (We use it for our contact form, feedback, bugs etc).