Real-time
Two-way sync
Changes in Customer.io or Insightly instantly reflect in both systems. No stale data, no manual imports.
Business productivity ⇄ CRM
Customer.io to Insightly integration — real-time, two-way sync
Keep Customer.io and Insightly 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 Customer.io and Insightly
Sync what happens in Customer.io with the customer records in Insightly, in real time and in both directions.
The CRM is supposed to be the record of every customer relationship, but customer-relevant information also accumulates in the other tools a team runs. Whatever Customer.io holds or produces that touches a customer, whether conversations, payments, replies, enriched data, or notes, the CRM only benefits if it arrives without someone copying it over.
Stacksync connects Campaigns, Broadcasts, Deliveries / Messages, Newsletters in Customer.io to Projects, Tasks, Events, Notes in Insightly with bi-directional, real-time sync. Activity and record changes in Customer.io update the matching contact or account in Insightly, and CRM data flows the other way wherever Customer.io can store and use it.
Common use cases
- 01 Keep unsubscribe and subscription-preference state consistent between Customer.io and the CRM to avoid compliance gaps.
- 02 Sync account-level objects and their person relationships for B2B messaging keyed to company attributes.
- 03 Deduplicate and align customer records between Insightly and an ERP or invoicing system
- 04 Two-way sync of Insightly contacts and organizations with a marketing automation platform
Common sync patterns
Where Customer.io supplies contact or company data
Enriched fields land directly on records in Insightly, and refreshes keep them from going stale.
Where Customer.io processes payments
Charges, refunds, and subscription changes appear on the account in Insightly, so revenue context lives with the relationship.
Where Customer.io can store CRM context: fields kept current
Owner, lifecycle stage, or account details from Insightly sync into Customer.io, so people working there have the context without switching tools.
What you can sync between Customer.io and Insightly
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.
| Customer.io objects | Insightly objects | How this pairing syncs | |
|---|---|---|---|
| Events Behavioral events sent via the Track API that trigger campaigns. | Events Calendar items sync for a complete activity timeline. | Same entity on both sides — records pair one-to-one and field-level changes reconcile in both directions. | |
| Deliveries / Messages Per-recipient message records whose lifecycle events flow out through reporting webhooks. | Products Product catalog entries support line-item syncing on opportunities and quotes. | Deliveries / Messages is specific to Customer.io and Products to Insightly — each maps to any object or custom field on the other side. | |
| Newsletters Recurring email sends with performance metrics available for reporting syncs. | Custom Fields Per-object custom fields carry enrichment and billing data written from external systems. | Newsletters is specific to Customer.io and Custom Fields to Insightly — each maps to any object or custom field on the other side. | |
| People Profiles with attributes, matched on identifiers like id or email; the main write target of data syncs. | Contacts Person records sync with marketing and support tools to keep one contact list. | People is specific to Customer.io and Contacts to Insightly — each maps to any object or custom field on the other side. | |
| Objects Non-person entities such as accounts or companies, related to people for account-level messaging. | Organizations Company records map to accounts in ERPs and other CRMs. | Objects is specific to Customer.io and Organizations to Insightly — each maps to any object or custom field on the other side. | |
| Segments Attribute- or event-based groups; data syncs feed the attributes segments evaluate. | Leads Unqualified prospects sync in from forms and enrichment sources before conversion. | Segments is specific to Customer.io and Leads to Insightly — each maps to any object or custom field on the other side. |
How changes propagate between Customer.io and Insightly
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.
Customer.io Insightly Sub-second propagation
DetectionCustomer.io notifies Stacksync of record changes through webhook events. Reporting webhooks push message and delivery events.
DeliveryEach detected change is written to Insightly through its API, with automatic retries and rate-limit backoff.
Insightly Customer.io Interval-based propagation
DetectionStacksync polls Insightly for changes on an incremental schedule, reading only records changed since the previous pass. Polling on record updated-date fields.
DeliveryEach detected change is written to Customer.io through its API, with automatic retries and rate-limit backoff.
Rate-limit considerations
- Customer.io: Subject to per-API rate limits documented by Customer.io.
- Insightly: Daily API request caps vary by Insightly plan.
What ships with Customer.io ⇄ Insightly
Connect Customer.io and Insightly for flexible, real-time data sync.
Real-time sync, workflow automation, event queues, EDI, and monitoring, for every Customer.io–Insightly connection.
No-code + pro-code
Workflow automation
Trigger automated workflows whenever Customer.io or Insightly 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 Customer.io or Insightly record.
Observability
Monitoring
Track your Customer.io ⇄ Insightly sync health, view errors, and replay failed events in one click.
Trading partners
EDI
Transform legacy EDI complexity into simple database interactions between Customer.io and Insightly.
How the Customer.io and Insightly connectors work
Customer.io
- Integration surface
- REST APIs split by purpose: Track API for data ingestion, App API for campaigns, people lookups, and messages
- Authentication
- Basic auth with site ID and API key for the Track API; bearer token for the App API
- Change detection
- Reporting webhooks push message and delivery events; person attribute changes are not streamed and require source-side detection
- Capabilities
- read · write · webhooks
- Rate limits
- Subject to per-API rate limits documented by Customer.io
Insightly
- Integration surface
- REST API (versioned)
- Authentication
- API key sent via HTTP Basic authentication
- Change detection
- Polling on record updated-date fields
- Capabilities
- read · write
- Rate limits
- Daily API request caps vary by Insightly plan
How it works
How to connect Customer.io to Insightly — 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 Customer.io and Insightly with each platform's native method — OAuth, API keys, or service accounts — plus secure options like SSH tunneling, IP whitelisting, and VPC peering.
Customer.io
connected
Insightly
connected
OAuth 2.0SSH tunnelSSL certificateVPC peering - 02
Choose tables
Pick the Customer.io and Insightly 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 · Customer.io ⇄ InsightlyCustomers 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.
Customer.io InsightlyCompany company_name textEmail email textAmount amount numericCreated created_at timestamp
FAQ
Customer.io and Insightly integration FAQ
-
Yes. Stacksync provides a managed, real-time two-way integration between Customer.io and Insightly: authenticate both systems, choose the objects to sync (such as Customer.io's Events and Deliveries / Messages), map fields visually, and changes propagate both ways in milliseconds — no code required.
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Customer.io: The Track API is ingestion-oriented: integrations identify people and send events, and Customer.io matches records on identifiers such as id or email. Insightly: Insightly combines CRM and project management in one data model, so opportunities can convert into linked projects, and both object types are available over the same API. Stacksync's field mapping accounts for these differences between Customer.io and Insightly 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 Customer.io and Insightly 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 Customer.io and Insightly connectors, real-time two-way sync, monitoring, and support. That replaces building and maintaining a custom Customer.io–Insightly integration in-house.
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Yes — Stacksync ships production-grade connectors for both Customer.io and Insightly. 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 Customer.io: Reporting webhooks push message and delivery events; person attribute changes are not streamed and require source-side detection. On Insightly: Polling on record updated-date fields. 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
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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