Real-time
Two-way sync
Changes in Apollo.io or HubSpot instantly reflect in both systems. No stale data, no manual imports.
CRM
Apollo.io to HubSpot integration — real-time, two-way sync
Keep Apollo.io and HubSpot in sync without custom scripts. Cut weeks of integration work, eliminate silent data drift, and give your team a single, reliable source of truth.
- SOC 2 and 6 other compliance frameworks
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Adopted by fast-scaling companies moving mission-critical data in real time
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Why teams connect Apollo.io and HubSpot
Run Apollo.io and HubSpot side by side with the same accounts and contacts in both, whether they serve different teams or one is replacing the other.
Two CRMs in one company is more common than anyone plans for: an acquisition brings its own system, regions or business units standardize differently, or a migration is under way and both are live. In every case, some of the same companies and people exist in both systems, and every day of manual double entry pushes the copies further apart.
Stacksync syncs People (database records), Sequences, Deals (Opportunities), Tasks and calls in Apollo.io with Contact, Company, Deal, Line Item in HubSpot in real time and in both directions, with field-level mapping and matching on identifiers you choose. Update a record in either CRM and the other reflects it within seconds.
Common use cases
- 01 Land sequence enrollment status and outcomes in a warehouse for outbound performance reporting.
- 02 Deduplicate contacts across Apollo and the CRM by syncing on email as the match key.
- 03 Push product signup and usage events into HubSpot contact properties to drive lifecycle marketing segmentation.
- 04 Write warehouse-computed lead and account scores back to HubSpot properties on a schedule or in near real time.
Common sync patterns
Divisional or regional split
Where each CRM serves a different team or region, sync just the shared accounts and contacts so handoffs and cross-sell work.
Where both track pipeline: deal visibility across systems
Deal stage and value on shared accounts stay visible from either CRM.
Post-acquisition consolidation
Keep both CRMs accurate while the merged team decides on a target system, instead of freezing one and losing months of updates.
What you can sync between Apollo.io and HubSpot
Representative objects on each side — any object or custom field can map to any target. Schemas are auto-detected; types are converted between the two systems.
| Apollo.io objects | HubSpot objects | How this pairing syncs | |
|---|---|---|---|
| Contacts People saved to your Apollo account, synced with emails, phone numbers, and enrichment fields. | Contact Synced with incremental and full sync per the Stacksync docs. | Same entity on both sides — records pair one-to-one and field-level changes reconcile in both directions. | |
| Deals (Opportunities) Pipeline records that can be read and written to keep Apollo aligned with the CRM of record. | Audit Synced with incremental and full sync per the Stacksync docs. | Deals (Opportunities) is specific to Apollo.io and Audit to HubSpot — each maps to any object or custom field on the other side. | |
| Tasks and calls Rep activity records synced for activity reporting and coaching workflows. | Company Synced with incremental and full sync per the Stacksync docs. | Tasks and calls is specific to Apollo.io and Company to HubSpot — each maps to any object or custom field on the other side. | |
| Custom fields Account- and contact-level custom attributes mapped field-by-field in a sync. | Deal Synced with incremental and full sync per the Stacksync docs. | Custom fields is specific to Apollo.io and Deal to HubSpot — each maps to any object or custom field on the other side. | |
| Accounts Company records with firmographic attributes, matched to CRM accounts during sync. | Line Item Synced with incremental and full sync per the Stacksync docs. | Accounts is specific to Apollo.io and Line Item to HubSpot — each maps to any object or custom field on the other side. | |
| People (database records) Prospects from Apollo's global database, pulled into downstream systems once enriched or saved. | Product Synced with incremental and full sync per the Stacksync docs. | People (database records) is specific to Apollo.io and Product to HubSpot — each maps to any object or custom field on the other side. |
How changes propagate between Apollo.io and HubSpot
Each direction of the sync is driven by what the source system can signal and what the destination accepts — detection, delivery, and expected latency below.
Apollo.io HubSpot Interval-based propagation
DetectionStacksync polls Apollo.io for changes on an incremental schedule, reading only records changed since the previous pass. Polling on updated-at timestamps.
DeliveryEach detected change is written to HubSpot through its API, with automatic retries and rate-limit backoff.
HubSpot Apollo.io Sub-second propagation
DetectionHubSpot pushes changes as they happen — webhook events backed by change data capture. Records: incremental near-real-time change tracking.
DeliveryEach detected change is written to Apollo.io through its API, with automatic retries and rate-limit backoff.
Rate-limit considerations
- Apollo.io: Rate limits and enrichment credits vary by plan; bulk endpoints are throttled separately from single-record calls.
- HubSpot: Request limits vary by subscription tier and API type.
What ships with Apollo.io ⇄ HubSpot
Connect Apollo.io and HubSpot for flexible, real-time data sync.
Real-time sync, workflow automation, event queues, EDI, and monitoring, for every Apollo.io–HubSpot connection.
No-code + pro-code
Workflow automation
Trigger automated workflows whenever Apollo.io or HubSpot data changes, update records, fire webhooks, or kick off sequences without brittle API scripts.
At scale
Event queues
Handle millions of events per minute without losing a single Apollo.io or HubSpot record.
Observability
Monitoring
Track your Apollo.io ⇄ HubSpot sync health, view errors, and replay failed events in one click.
Trading partners
EDI
Transform legacy EDI complexity into simple database interactions between Apollo.io and HubSpot.
How the Apollo.io and HubSpot connectors work
Apollo.io
- Integration surface
- REST API
- Authentication
- API key (passed in request headers); master keys unlock account-wide endpoints
- Change detection
- Polling on updated-at timestamps; webhook callbacks exist only for delivering asynchronous enrichment results, not as a general change-event stream
- Capabilities
- read · write
- Rate limits
- Rate limits and enrichment credits vary by plan; bulk endpoints are throttled separately from single-record calls
HubSpot
- Integration surface
- REST API (CRM v3)
- Authentication
- OAuth (choose HubSpot account and authorize Stacksync); requires a HubSpot 'Super Admin' to grant access; optional "Grant access to sensitive fields" checkbox for sensitive/highly sensitive fields
- Change detection
- Records: incremental near-real-time change tracking. Associations: HubSpot has no native association CDC
- Capabilities
- read · write · CDC · webhooks
- Rate limits
- Request limits vary by subscription tier and API type.
How it works
How to connect Apollo.io to HubSpot — three steps, no code
Configure and sync within minutes, no code. Whether you sync 50k or 100M+ records, Stacksync handles the queues, infra, and plumbing. Integrations are non-invasive and need zero setup on your systems.
- 01
Connect your apps
Authenticate Apollo.io and HubSpot with each platform's native method — OAuth, API keys, or service accounts — plus secure options like SSH tunneling, IP whitelisting, and VPC peering.
Apollo.io
connected
HubSpot
connected
OAuth 2.0SSH tunnelSSL certificateVPC peering - 02
Choose tables
Pick the Apollo.io and HubSpot objects to sync — Stacksync auto-detects both schemas, including custom fields where the platform exposes them. Sync to existing tables, or let Stacksync create new ones with ideal data types.
objects · Apollo.io ⇄ HubSpotCustomers 12,480Sales Orders 8,213Invoices 5,902Items 1,344 - 03
Map fields
Fields map automatically even when names and types differ. Stacksync handles transformation and type casting for you, zero configuration required.
Apollo.io HubSpotCompany company_name textEmail email textAmount amount numericCreated created_at timestamp
FAQ
Apollo.io and HubSpot integration FAQ
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Yes. Stacksync provides a managed, real-time two-way integration between Apollo.io and HubSpot: authenticate both systems, choose the objects to sync (such as Apollo.io's Contacts and Deals (Opportunities)), map fields visually, and changes propagate both ways in milliseconds — no code required.
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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. HubSpot: CDC Boost requires manually creating rollup calculation properties in HubSpot per association table (the unlabeled _label_none rollup is mandatory) and a sync restart to activate. Stacksync's field mapping accounts for these differences between Apollo.io and HubSpot without custom code.
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Stacksync is SOC 2 Type II and ISO 27001 certified with HIPAA BAA support. Data is encrypted in transit, and a zero-persistent-storage architecture means Apollo.io and HubSpot records are not retained after a sync operation.
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Stacksync pricing is usage-based and starts at $1,000/month, including the managed Apollo.io and HubSpot connectors, real-time two-way sync, monitoring, and support. That replaces building and maintaining a custom Apollo.io–HubSpot integration in-house.
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Yes — Stacksync ships production-grade connectors for both Apollo.io and HubSpot. The connectors handle authentication, schema detection, rate limits, and retries; you configure the sync, and Stacksync operates it.
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Change detection on Apollo.io: Polling on updated-at timestamps; webhook callbacks exist only for delivering asynchronous enrichment results, not as a general change-event stream. On HubSpot: Records: incremental near-real-time change tracking. Associations: HubSpot has no native association CDC. Each detected change propagates to the other side in milliseconds, with field-level conflict resolution and an inspectable event log.
SECURITY
Security teams trust Stacksync
As a data company, we understand the importance of keeping your data secure. Stacksync is built with security best practices to keep your data safe at every layer, and is DPF-certified for US, EU, UK and CH data transfers.
SOC 2 Type II
ISO 27001
HIPAA BAA
GDPR
CCPA
CSA STAR
DPF US-EU-UK-CH
→ SECURITY WITH BENEFITS
SSO & SCIM
Let your users access Stacksync from your centralized user management systems. Works with Okta, Azure, Google SSO and more.
Alerts
Immediately get alerted about record syncing issues over email, Slack, PagerDuty and WhatsApp. Resolve issues from a centralized dashboard with retry and revert options.
Secure connection options
Securely connects to your systems with:
Related integrations
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