Ask HN: Do you use any CRM with your startup?

I'm wondering if anyone is using any type of CRM with your startup/service? Would you mind sharing? Your startup, and CRM that you use, if any?

How do you deal with sync'ing client data between your platform and CRM? What do you use CRM for? Email followups? Reporting?

Thank you!

P.S. As of myself:

1. Yes, we use CRM with our service. 2. We use ZohoCRM. 3. We sync data from our system to Zoho. There is some data redundancy, but we've agreed to assume our service is 1-source-of-truth. (Yes, sometimes it's messy - we have no time to build both-way-sync.) 4. We use CRM for customer development, all communications, followups, state management & reporting.