We use these systems for our small business (20 employees, 3 physical locations).

(A) ERP: Handling Inventory and Accounting.

(B) Less Annoying CRM: Tracking Customer Interactions. It's a CRM.

(C) Mailchimp: Sending customer marketing communications

(D) Google Suite: Email, Contacts, Calendar and Drive

(E) Sparkpost: Automated internal emails with report attachments. Notification emails to customers.

(F) Server: Runs scripts for (E) and (G)

(G) Hugo/Netlify Main Site: Mostly static site. Interacts with (C) and (D)

My question is how do you keep track of everything and keep it all in sync? Do you create a separate database and use scripts to update it from all these different sources?

How do you handle this at your companies?

I foresee increased interaction between all of these systems and it's getting overwhelming keeping them synced and working together.