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CRM ⇄ Business productivity

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

Keep Kustomer and Zendesk 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 Kustomer and Zendesk

Sync what happens in Zendesk with the customer records in Kustomer, 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 Zendesk 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 Users, Organizations, Attachments, Ticket Forms in Zendesk to Tags, Notes, Customers, Conversations in Kustomer with bi-directional, real-time sync. Activity and record changes in Zendesk update the matching contact or account in Kustomer, and CRM data flows the other way wherever Zendesk can store and use it.

Common use cases

  • Consolidate several Zendesk instances into one reporting database after a merger or brand split.
  • Sync tickets, users, and organizations into Postgres so support analytics run on SQL instead of repeated API pulls.
  • Mirror conversations and satisfaction data into a warehouse for support analytics and agent performance reporting
  • Keep customer attributes updated from billing systems so routing rules and SLAs reflect account value

Where Zendesk can store CRM context: fields kept current

Owner, lifecycle stage, or account details from Kustomer sync into Zendesk, so people working there have the context without switching tools.

Where Zendesk handles support or shared inboxes

Tickets and conversations attach to the right contact and account in Kustomer, so sales sees open issues before the next call.

Where Zendesk supplies contact or company data

Enriched fields land directly on records in Kustomer, and refreshes keep them from going stale.

What you can sync between Kustomer and Zendesk

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.

Kustomer objects Zendesk objects
Custom Objects (Klasses) Structured external records such as orders and subscriptions synced in to appear on the customer timeline. Ticket Forms Synced with incremental and full sync per the Stacksync docs.
Users Agent records map conversation ownership to people in other systems. Tickets The central work object; synced to databases for SLA and volume reporting or mirrored into engineering tools.
Teams Team assignments support routing parity and reporting. Tickets Comments Synced with incremental and full sync per the Stacksync docs.
Tags Labels on conversations and customers sync for categorization and analytics. Users End users and agents; matched to CRM contacts to keep requester data consistent.
Notes Internal annotations carry context alongside synced conversations. Organizations Company groupings for users; typically kept aligned with CRM accounts.
Customers The central record whose timeline aggregates every interaction; external attributes sync onto it. Attachments Synced with incremental and full sync per the Stacksync docs.
What ships with Kustomer ⇄ Zendesk

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

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

Real-time

Two-way sync

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

No-code + pro-code

Workflow automation

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

Observability

Monitoring

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

Trading partners

EDI

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

How the Kustomer and Zendesk connectors work

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

Zendesk

Integration surface
REST API
Authentication
OAuth app authorization: enter your Zendesk subdomain (from {sub_domain_name}.zendesk.com) in Stacksync Connections and click "Authorize App"
Change detection
Incremental export endpoints with cursor-based pagination, plus webhooks fired by triggers
Capabilities
read · write · webhooks
Rate limits
Request limits vary by plan; incremental export endpoints have their own allowances.
Zendesk setup guide
How it works

How to connect Kustomer to Zendesk — 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 Kustomer and Zendesk 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
    Kustomer connected
    Zendesk connected
    OAuth 2.0
    SSH tunnel
    SSL certificate
    VPC peering
  2. 02

    Choose tables

    Pick the Kustomer and Zendesk 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 · Kustomer ⇄ Zendesk
    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
    Kustomer Zendesk
    Company company_name text
    Email email text
    Amount amount numeric
    Created created_at timestamp
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FAQ

Kustomer and Zendesk integration FAQ

SECURITY

Security teams love 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
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:

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 386 integrations available for Kustomer and Zendesk.

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