Planning CRM sync for an email marketing tool: Salesforce, HubSpot and Zoho

You are a product manager asked to connect an email marketing tool to a CRM such as Salesforce, HubSpot or Zoho. Explain how you would approach the integration: what it should do, how data should move between the two systems, and how you would ship and measure it. ```hint Follow one contact Trace a single contact that a marketer emails and a sales rep works in the CRM. Ask what each person needs to see from the other system, and which system should win when the two disagree. ``` ### Clarifying Questions - Am I the PM of the email marketing product, building connectors for its customers, or of a company connecting its own marketing and sales tools? - Must all three CRMs be supported at launch, or can I sequence them based on demand? - Which records are in scope: contacts and leads only, or also accounts, deals and campaign results? - Does data need to flow both ways, and how fresh must it be (for example, an unsubscribe compared with an email open)? ### What a Strong Answer Covers - The manual workflows the integration replaces for marketers, sales reps and admins, and the goal it serves - Sync design: which objects move in which direction, the source of truth per field, contact matching, duplicates and conflicts - Consent and unsubscribe handling, permissions, security and the CRMs' API limits - Sequencing across Salesforce, HubSpot and Zoho, an MVP scope and a rollout plan - Success metrics with guardrails such as sync errors, duplicate records and compliance ### Follow-up Questions - How would your design change for a customer whose CRM API limits rule out a full re-sync every night? - A contact unsubscribes in the email tool, and an hour later a sales rep edits the same record in the CRM. How do you make sure the contact is not re-subscribed? - Would you build each connector in-house, use a third-party integration platform, or support only a general automation tool? What would decide it?