Skip to content
Business productivity

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

Keep Klaviyo 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

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 Klaviyo and Zendesk

Stop re-entering the same information in Klaviyo and Zendesk: Stacksync keeps the records they share consistent in real time, in both directions.

Two tools in the daily stack often hold overlapping information: the same people, the same companies, or the same pieces of work, described twice. The tools do different jobs, so consolidating is not the answer; the overlap just needs to stop drifting.

Stacksync syncs Lists, Segments, Events, Metrics in Klaviyo with Tickets, Tickets Comments, Users, Organizations in Zendesk in real time. You choose which records overlap, map the fields that should match, and pick a direction or let changes flow both ways. From then on, an update made in either tool is reflected in the other within seconds, without exports or copy-paste.

Because the sync is field-level, each tool keeps its own extras; only the shared data is held in agreement.

Common use cases

  • Sync customer profiles between Klaviyo and the CRM or warehouse so segments can use fields beyond storefront data
  • Push offline, ERP, or subscription order events into Klaviyo as metrics to trigger post-purchase and win-back flows
  • Sync tickets, users, and organizations into Postgres so support analytics run on SQL instead of repeated API pulls.
  • Write CRM account tier, owner, and renewal data onto Zendesk organizations and ticket fields so agents see context in the ticket.

Where both tools track people or companies: one consistent record

Contact and company details corrected in either tool update the other, so nobody works from the old version.

Where one tool produces events: mirror them in the other

Payments, replies, messages, or tickets created in one tool can create or update matching records in the other, keeping context in one place.

Where Zendesk is where the team documents or plans: keep its data fed

Information that originates in Klaviyo stays current in Zendesk instead of going stale after a one-time paste.

What you can sync between Klaviyo 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.

Klaviyo objects Zendesk objects
Catalog Items Product catalog records synced from an ERP or PIM power product blocks and back-in-stock triggers. Organizations Company groupings for users; typically kept aligned with CRM accounts.
Tags Organizational labels on campaigns, flows, and lists support reporting rollups. Attachments Synced with incremental and full sync per the Stacksync docs.
Profiles Person records with arbitrary custom properties are the target for CRM and warehouse-sourced attributes. Ticket Forms Synced with incremental and full sync per the Stacksync docs.
Lists Static audience memberships sync in from CRMs and forms for targeting. Tickets The central work object; synced to databases for SLA and volume reporting or mirrored into engineering tools.
Segments Dynamic audiences are readable so other tools can mirror who qualifies. Tickets Comments Synced with incremental and full sync per the Stacksync docs.
Events Timestamped behavioral records tied to metrics; external order and product events are pushed in to trigger flows. Users End users and agents; matched to CRM contacts to keep requester data consistent.
What ships with Klaviyo ⇄ Zendesk

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

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

Real-time

Two-way sync

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

No-code + pro-code

Workflow automation

Trigger automated workflows whenever Klaviyo 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 Klaviyo or Zendesk record.

Observability

Monitoring

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

Trading partners

EDI

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

How the Klaviyo and Zendesk connectors work

Klaviyo

Integration surface
REST API compliant with the JSON:API specification
Authentication
OAuth 2.0 for apps or private API keys
Change detection
Polling on updated timestamps; outbound webhooks exist for event topics (availability depends on plan or app-partner status) and as flow webhook actions
Capabilities
read · write · webhooks
Rate limits
Per-endpoint burst and steady rate limits apply

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 Klaviyo 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 Klaviyo 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
    Klaviyo connected
    Zendesk connected
    OAuth 2.0
    SSH tunnel
    SSL certificate
    VPC peering
  2. 02

    Choose tables

    Pick the Klaviyo 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 · Klaviyo ⇄ 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
    Klaviyo Zendesk
    Company company_name text
    Email email text
    Amount amount numeric
    Created created_at timestamp
Try interactive demo
FAQ

Klaviyo 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 Klaviyo and Zendesk.

Popular · 8 of 386
All Klaviyo integrations All Zendesk integrations Browse all integrations
Coworkers laughing in front of a laptop in a casual office setting

Your last integration took months.
Your next one takes a prompt.

Book a demo Tour the platform on your own