Apollo.io to ZoomInfo integration — real-time data sync

Yes. Stacksync provides a managed, real-time integration between Apollo.io and ZoomInfo — ZoomInfo is a read-only source, so data flows from it into the other system: authenticate both systems, choose the objects to sync, map fields visually, and changes propagate in milliseconds — no code required.

On the Apollo.io side: Custom fields, Contacts, Accounts, People (database records), plus custom fields where Apollo.io exposes them. On the ZoomInfo side: Contact Profiles, Intent Signals, Scoops, Technographics. Stacksync auto-detects both schemas and converts types between the two systems.

ZoomInfo is a read-only source, so this integration runs one-way: Stacksync reads from ZoomInfo in real time and delivers into Apollo.io. Field mapping and monitoring work the same as for two-way pairs.

Common patterns for Apollo.io and ZoomInfo: Divisional or regional split; Where both track pipeline: deal visibility across systems; Post-acquisition consolidation. Where each CRM serves a different team or region, sync just the shared accounts and contacts so handoffs and cross-sell work.

Apollo.io: REST API. Authentication: API key (passed in request headers); master keys unlock account-wide endpoints. ZoomInfo: REST API organized around search and enrich endpoints. Authentication: API credentials exchanged for a short-lived JWT. Stacksync manages authentication, retries, and rate limits on both sides.

Apollo.io: Apollo distinguishes between people in its global database and contacts saved to your account; only saved contacts carry your custom fields and sequence history. ZoomInfo: Intent data is delivered as company-level topic scores rather than person-level events, which shapes how it maps onto CRM records. Stacksync's field mapping accounts for these differences between Apollo.io and ZoomInfo without custom code.