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CRM

Connect Kustomer to any app with two-way sync.

Two-way sync Kustomer across all your CRMs, databases, data warehouses, EDI systems, and AI tools, with custom workflows tailored to your data.

  • 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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Object catalog

What Stacksync syncs in Kustomer.

These objects sync between Kustomer and any connected system, with field-level mapping and conflict resolution. Custom fields are picked up from the live schema where Kustomer exposes them.

Customers
The central record whose timeline aggregates every interaction; external attributes sync onto it.
Conversations
Support threads across channels sync outward for analytics and CRM context.
Messages
Individual messages within conversations support full-thread replication.
Companies
Organization records group customers and map to CRM accounts.
Custom Objects (Klasses)
Structured external records such as orders and subscriptions synced in to appear on the customer timeline.
Users
Agent records map conversation ownership to people in other systems.
Teams
Team assignments support routing parity and reporting.
Tags
Labels on conversations and customers sync for categorization and analytics.
Notes
Internal annotations carry context alongside synced conversations.
API surface

How Stacksync connects to Kustomer.

The connector runs on Kustomer's native API. Stacksync manages authentication, rate limits, retries, and schema changes so your team does not maintain integration code.

Connection
REST API
Authentication
API key used as a bearer token, scoped by role
Change detection
Outbound webhooks on record events, plus polling for backfill
Rate limits
Subject to the platform's API rate limits

Sync directions

  • Read Supported
  • Write Supported
  • Change data capture Not available
  • Webhooks Supported
What ships with Kustomer

Connect Kustomer for flexible, real-time data sync.

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

Real-time

Two-way sync

Changes in Kustomer instantly reflect across connected systems. No stale data, no manual imports.

No-code + pro-code

Workflow automation

Trigger automated workflows whenever 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 Kustomer record.

Observability

Monitoring

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

Trading partners

EDI

Transform legacy EDI complexity into simple database interactions.

Use cases

What teams run on the Kustomer connector.

Kustomer is bought by mid-market and enterprise B2C support organizations in retail, travel, finance, and health as an AI-native customer service CRM. It is positioned around a customer-centric timeline where every interaction ties to a single customer record, typically replacing tools like Zendesk in the CX layer. That makes it the system of record for support conversations and service context, while the commercial record lives in the sales CRM or data warehouse, which is exactly the data teams want flowing both ways.

  • Support/CX ops
  • RevOps
  • IT admins
  • Data engineering

  1. Sync customers bi-directionally with the CRM and ERP so agents see deal, billing, and subscription context on the timeline

  2. Push order and shipment records from commerce systems into Kustomer custom objects so agents answer order-status questions without switching tools

  3. Mirror conversations and satisfaction data into a warehouse for support analytics and agent performance reporting

  4. Keep customer attributes updated from billing systems so routing rules and SLAs reflect account value

  5. Escalate conversation-derived signals into the CRM as tasks or opportunities

  6. Sync Customers and Companies bidirectionally with the sales CRM so agents see account status, plan, and lifecycle stage on the Kustomer timeline and sales sees open Conversations.

All Kustomer integrations

Pick the system you need to keep in sync with Kustomer. Each page covers the sync setup, field mapping, and common workflows for that pair.

CRM · 29

ERP · 24

Database · 11

Data warehouse · 9

Business productivity · 29

Accounting and finance · 13

How it works

Set up Kustomer in minutes, without APIs.

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 with its 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
    OAuth 2.0
    SSH tunnel
    SSL certificate
    VPC peering
  2. 02

    Choose tables

    Pick the Kustomer objects to sync — Stacksync auto-detects the schema, 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
    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 database
    Company company_name text
    Email email text
    Amount amount numeric
    Created created_at timestamp
Try interactive demo

FAQ

Kustomer connector FAQ

What can I sync with the Kustomer connector?

Kustomer's core objects — Customers, Conversations, Messages, Companies and custom fields — can sync with any of 302 other systems. Every integration is real-time and bidirectional, with field-level mapping and conflict resolution.

How does Stacksync connect to Kustomer?

Via REST API, authenticated with API key used as a bearer token, scoped by role. Changes are detected as follows — outbound webhooks on record events, plus polling for backfill. Stacksync manages rate limits, retries, and schema changes automatically.

Is the Kustomer connector two-way?

Yes. Changes made in Kustomer propagate to the connected system and vice versa, in milliseconds. One-way flows are also supported when a direction should stay read-only.

How long does a Kustomer integration take to set up?

Most Kustomer integrations go live in minutes: authenticate Kustomer and the other system, pick objects and fields, and enable the sync. No code and no infrastructure to manage.

Is Kustomer data secure in transit?

Stacksync is SOC 2 Type II, ISO 27001, GDPR and HIPAA compliant. Kustomer data is encrypted in transit, and a zero-persistent-storage architecture means records are not retained after a sync operation.

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
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