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CRM

Intercom to Kustomer integration — real-time, two-way sync

Keep Intercom and Kustomer 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

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Why teams connect Intercom and Kustomer

Run Intercom and Kustomer 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 Companies, Conversations, Tickets, Data Events in Intercom with Custom Objects (Klasses), Users, Teams, Tags in Kustomer 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 Sync contacts and companies bi-directionally with the CRM so support sees deal context and sales sees conversation history
  • 02 Push product usage events from an application database into Intercom to trigger onboarding and retention messages
  • 03 Sync customers bi-directionally with the CRM and ERP so agents see deal, billing, and subscription context on the timeline
  • 04 Push order and shipment records from commerce systems into Kustomer custom objects so agents answer order-status questions without switching tools

Common sync patterns

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.

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.

What you can sync between Intercom and Kustomer

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.

Intercom objects Kustomer objects How this pairing syncs
Companies Company records group contacts and carry plan and account attributes used in segmentation. Companies Organization records group customers and map to CRM accounts. 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.
Conversations Support and sales threads sync outward for analytics and CRM context. Conversations Support threads across channels sync outward for analytics and CRM context. Same entity on both sides — records pair one-to-one and field-level changes reconcile in both directions.
Tags Labels applied to contacts, companies, and conversations sync for routing and reporting. Tags Labels on conversations and customers sync for categorization and analytics. 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.
Tickets Structured ticket records track issues alongside conversational threads. Customers The central record whose timeline aggregates every interaction; external attributes sync onto it. Tickets is specific to Intercom and Customers to Kustomer — each maps to any object or custom field on the other side.
Data Events Behavioral events pushed in from product databases trigger messages and flows. Messages Individual messages within conversations support full-thread replication. Data Events is specific to Intercom and Messages to Kustomer — each maps to any object or custom field on the other side.
Custom Data Attributes Typed custom fields on contacts and companies hold synced billing and usage data. Custom Objects (Klasses) Structured external records such as orders and subscriptions synced in to appear on the customer timeline. Custom Data Attributes is specific to Intercom and Custom Objects (Klasses) to Kustomer — each maps to any object or custom field on the other side.

How changes propagate between Intercom and Kustomer

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.

Intercom Kustomer Sub-second propagation

DetectionIntercom notifies Stacksync of record changes through webhook events. Webhook topic subscriptions for contact, company, and conversation events, plus polling for backfill.

DeliveryEach detected change is written to Kustomer through its API, with automatic retries and rate-limit backoff.

Kustomer Intercom Sub-second propagation

DetectionKustomer notifies Stacksync of record changes through webhook events. Outbound webhooks on record events, plus polling for backfill.

DeliveryEach detected change is written to Intercom through its API, with automatic retries and rate-limit backoff.

Rate-limit considerations

  • Intercom: Subject to per-app rate limits on the Intercom API.
  • Kustomer: Subject to the platform's API rate limits.
What ships with Intercom ⇄ Kustomer

Connect Intercom and Kustomer for flexible, real-time data sync.

Real-time sync, workflow automation, event queues, EDI, and monitoring, for every Intercom–Kustomer connection.

Real-time

Two-way sync

Changes in Intercom or Kustomer instantly reflect in both systems. No stale data, no manual imports.

No-code + pro-code

Workflow automation

Trigger automated workflows whenever Intercom or Kustomer 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 Intercom or Kustomer record.

Observability

Monitoring

Track your Intercom ⇄ Kustomer sync health, view errors, and replay failed events in one click.

Trading partners

EDI

Transform legacy EDI complexity into simple database interactions between Intercom and Kustomer.

How the Intercom and Kustomer connectors work

Intercom

Integration surface
REST API
Authentication
OAuth 2.0 for public apps or a workspace access token
Change detection
Webhook topic subscriptions for contact, company, and conversation events, plus polling for backfill
Capabilities
read · write · webhooks
Rate limits
Subject to per-app rate limits on the Intercom API

Kustomer

Integration surface
REST API
Authentication
API key used as a bearer token, scoped by role
Change detection
Outbound webhooks on record events, plus polling for backfill
Capabilities
read · write · webhooks
Rate limits
Subject to the platform's API rate limits
How it works

How to connect Intercom to Kustomer — 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.

  1. 01

    Connect your apps

    Authenticate Intercom and Kustomer with each platform's native method — OAuth, API keys, or service accounts — plus secure options like SSH tunneling, IP whitelisting, and VPC peering.

    • OAuth 2.0
    • SSH tunnel
    • VPC peering
    Intercom connected
    Kustomer connected
    OAuth 2.0
    SSH tunnel
    SSL certificate
    VPC peering
  2. 02

    Choose tables

    Pick the Intercom and Kustomer 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.

    • Standard objects
    • Custom objects
    • Auto-schema
    objects · Intercom ⇄ Kustomer
    Customers 12,480
    Sales Orders 8,213
    Invoices 5,902
    Items 1,344
  3. 03

    Map fields

    Fields map automatically even when names and types differ. Stacksync handles transformation and type casting for you, zero configuration required.

    • Auto-map
    • Type casting
    • Transforms
    Intercom Kustomer
    Company company_name text
    Email email text
    Amount amount numeric
    Created created_at timestamp
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FAQ

Intercom and Kustomer integration FAQ

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.

Learn more about security
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:

OAuth 2 SSH Tunnelling SSL certificates IP Whitelisting VPN gateway VPC peering and more

Related integrations

Every pair below is a real-time, two-way sync. Search all 425 integrations available for Intercom and Kustomer.

Popular · 8 of 425
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