Real-time
Two-way sync
Changes in Apollo.io or Close instantly reflect in both systems. No stale data, no manual imports.
CRM
Apollo.io to Close integration — real-time, two-way sync
Keep Apollo.io and Close 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
- POC with real engineers in minutes
Adopted by fast-scaling companies moving mission-critical data in real time
Case study
Migrated from MuleSoft
Case study
Migrated from Celigo
Migrated from Heroku Connect
Migrated from Matillion
Case study
Migrated from Fivetran
Case study
Migrated from Celigo
Why teams connect Apollo.io and Close
Run Apollo.io and Close 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 Sequences, Deals (Opportunities), Tasks and calls, Custom fields in Apollo.io with Opportunities, Activities, Tasks, Custom Activities in Close 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 call, SMS, and email activity data into a warehouse for rep performance and outreach-cadence analysis.
- 04 Write product usage or firmographic data from an internal database onto Close lead custom fields to prioritize follow-up.
Common sync patterns
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.
Migration with a parallel run
When one CRM is replacing the other, run both fully live until cutover, with no snapshot gap and no data freeze.
What you can sync between Apollo.io and Close
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 | Close objects | How this pairing syncs | |
|---|---|---|---|
| Contacts People saved to your Apollo account, synced with emails, phone numbers, and enrichment fields. | Contacts People nested under a lead, with emails and phone numbers used for outreach syncs. | Same entity on both sides — records pair one-to-one and field-level changes reconcile in both directions. | |
| Custom fields Account- and contact-level custom attributes mapped field-by-field in a sync. | Custom Fields Org-specific fields on leads, contacts, and opportunities; addressed by stable field ids in syncs. | Same entity on both sides — records pair one-to-one and field-level changes reconcile in both directions. Custom fields on either side are included in the mapping. | |
| People (database records) Prospects from Apollo's global database, pulled into downstream systems once enriched or saved. | Leads The top-level record in Close; represents a company and holds its contacts, opportunities, and activity history. | People (database records) is specific to Apollo.io and Leads to Close — each maps to any object or custom field on the other side. | |
| Sequences Outreach cadences (emailer campaigns in the API); enrollment status is read to track which contacts are being worked. | Opportunities Deal records with value, confidence, and status; commonly synced to reporting and billing systems. | Sequences is specific to Apollo.io and Opportunities to Close — each maps to any object or custom field on the other side. | |
| Deals (Opportunities) Pipeline records that can be read and written to keep Apollo aligned with the CRM of record. | Activities Calls, emails, SMS, notes, and meetings logged against a lead; the source for engagement analytics. | Deals (Opportunities) is specific to Apollo.io and Activities to Close — 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. | Tasks Follow-up items assigned to users; synced for workload and SLA reporting. | Tasks and calls is specific to Apollo.io and Tasks to Close — each maps to any object or custom field on the other side. |
How changes propagate between Apollo.io and Close
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 Close 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 Close through its API, with automatic retries and rate-limit backoff.
Close Apollo.io Sub-second propagation
DetectionClose notifies Stacksync of record changes through webhook events. Webhook subscriptions for record events, with polling on date_updated fields for backfills.
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.
- Close: Subject to per-endpoint rate limits communicated in response headers.
What ships with Apollo.io ⇄ Close
Connect Apollo.io and Close for flexible, real-time data sync.
Real-time sync, workflow automation, event queues, EDI, and monitoring, for every Apollo.io–Close connection.
No-code + pro-code
Workflow automation
Trigger automated workflows whenever Apollo.io or Close 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 Close record.
Observability
Monitoring
Track your Apollo.io ⇄ Close 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 Close.
How the Apollo.io and Close 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
Close
- Integration surface
- REST API
- Authentication
- API key (sent via HTTP Basic auth)
- Change detection
- Webhook subscriptions for record events, with polling on date_updated fields for backfills
- Capabilities
- read · write · webhooks
- Rate limits
- Subject to per-endpoint rate limits communicated in response headers
How it works
How to connect Apollo.io to Close — 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 Close 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
Close
connected
OAuth 2.0SSH tunnelSSL certificateVPC peering - 02
Choose tables
Pick the Apollo.io and Close 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 ⇄ CloseCustomers 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 CloseCompany company_name textEmail email textAmount amount numericCreated created_at timestamp
FAQ
Apollo.io and Close integration FAQ
-
Yes. Stacksync provides a managed, real-time two-way integration between Apollo.io and Close: authenticate both systems, choose the objects to sync (such as Apollo.io's Contacts and Custom fields), map fields visually, and changes propagate both ways in milliseconds — no code required.
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On the Apollo.io side: Sequences, Deals (Opportunities), Tasks and calls, Custom fields, plus custom fields where Apollo.io exposes them. On the Close side: Opportunities, Activities, Tasks, Custom Activities. Stacksync auto-detects both schemas and converts types between the two systems.
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Yes. Each object mapping can be bidirectional or restricted to a single direction (both systems accept writes). Read-only mirrors, one-way pushes, and full two-way sync can be mixed in the same integration.
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Common patterns for Apollo.io and Close: Where both track pipeline: deal visibility across systems; Post-acquisition consolidation; Migration with a parallel run. Deal stage and value on shared accounts stay visible from either CRM.
-
Apollo.io: REST API. Authentication: API key (passed in request headers); master keys unlock account-wide endpoints. Close: REST API. Authentication: API key (sent via HTTP Basic auth). 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. Close: Webhook subscriptions can be created via the API to receive create, update, and delete events on leads, contacts, opportunities, and activities. Stacksync's field mapping accounts for these differences between Apollo.io and Close without custom code.
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
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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