It depends what you want from your CRM. Coming from larger sales organizations (Cisco and Maxim Integrated), I often hear that Salesforce doesn't add much value to the individual sales person and that it's seen as a management/inspection/reporting tool. Salespeople live in email and notes, which I believe makes Evernote a good choice for a small CRM that focuses on closing business as opposed to management reporting. Take a look at the Smartsheet to Evernote integrated. I'm thinking that it might be the right combination of structured data meets unstructured data. I truly believe there is an opportunity for someone to develop a lightweight CRM (read: management reporting/structured data) that lives on top of Evernote Business.