Skip to content
Business productivity ⇄ CRM

Klaviyo to Vtiger CRM integration — real-time, two-way sync

Keep Klaviyo and Vtiger CRM 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 Vtiger CRM

Sync what happens in Klaviyo with the customer records in Vtiger CRM, 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 Klaviyo 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, Flows, Templates, Catalog Items in Klaviyo to Invoices, Campaigns, Contacts, Organizations in Vtiger CRM with bi-directional, real-time sync. Activity and record changes in Klaviyo update the matching contact or account in Vtiger CRM, and CRM data flows the other way wherever Klaviyo can store and use it.

Common use cases

  • 01 Mirror campaign and flow engagement events into a warehouse for revenue attribution alongside order data
  • 02 Keep suppression and consent status consistent between Klaviyo and other email or SMS tools
  • 03 Sync Cases to an external help desk or engineering tracker so support and product teams work from the same tickets.
  • 04 Push Quotes and Invoices into accounting software to avoid re-keying billing data.

Common sync patterns

Where Klaviyo supplies contact or company data

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

Where Klaviyo processes payments

Charges, refunds, and subscription changes appear on the account in Vtiger CRM, so revenue context lives with the relationship.

Where Klaviyo can store CRM context: fields kept current

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

What you can sync between Klaviyo and Vtiger CRM

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 Vtiger CRM objects How this pairing syncs
Campaigns Email and SMS sends expose performance data for warehouse-based reporting. Campaigns Marketing campaign records tied to leads and contacts. Same entity on both sides — records pair one-to-one and field-level changes reconcile in both directions.
Templates Message templates are accessible via API for content management workflows. Opportunities Deal records, historically the Potentials module, synced for pipeline reporting. Templates is specific to Klaviyo and Opportunities to Vtiger CRM — each maps to any object or custom field on the other side.
Catalog Items Product catalog records synced from an ERP or PIM power product blocks and back-in-stock triggers. Cases Support tickets from the help-desk module, mirrored to external trackers. Catalog Items is specific to Klaviyo and Cases to Vtiger CRM — each maps to any object or custom field on the other side.
Tags Organizational labels on campaigns, flows, and lists support reporting rollups. Products Catalog items referenced on quotes, orders, and invoices. Tags is specific to Klaviyo and Products to Vtiger CRM — each maps to any object or custom field on the other side.
Profiles Person records with arbitrary custom properties are the target for CRM and warehouse-sourced attributes. Quotes Pricing documents with line items. Profiles is specific to Klaviyo and Quotes to Vtiger CRM — each maps to any object or custom field on the other side.
Lists Static audience memberships sync in from CRMs and forms for targeting. Sales Orders Order records between quote and invoice, synced to fulfillment systems. Lists is specific to Klaviyo and Sales Orders to Vtiger CRM — each maps to any object or custom field on the other side.

How changes propagate between Klaviyo and Vtiger CRM

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.

Klaviyo Vtiger CRM Sub-second propagation

DetectionKlaviyo notifies Stacksync of record changes through webhook events. Polling on updated timestamps.

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

Vtiger CRM Klaviyo Sub-second propagation

DetectionVtiger CRM notifies Stacksync of record changes through webhook events. Polling on record modified timestamps.

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

Rate-limit considerations

  • Klaviyo: Per-endpoint burst and steady rate limits apply.
  • Vtiger CRM: Subject to the platform's API rate limits, which vary by edition.
What ships with Klaviyo ⇄ Vtiger CRM

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

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

Real-time

Two-way sync

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

No-code + pro-code

Workflow automation

Trigger automated workflows whenever Klaviyo or Vtiger CRM 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 Vtiger CRM record.

Observability

Monitoring

Track your Klaviyo ⇄ Vtiger CRM 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 Vtiger CRM.

How the Klaviyo and Vtiger CRM 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

Vtiger CRM

Integration surface
REST API
Authentication
HTTP Basic with username and access key
Change detection
Polling on record modified timestamps; workflows can fire outbound HTTP calls on record events
Capabilities
read · write · webhooks
Rate limits
Subject to the platform's API rate limits, which vary by edition.
How it works

How to connect Klaviyo to Vtiger CRM — 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 Vtiger CRM 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
    Vtiger CRM connected
    OAuth 2.0
    SSH tunnel
    SSL certificate
    VPC peering
  2. 02

    Choose tables

    Pick the Klaviyo and Vtiger CRM 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 ⇄ Vtiger CRM
    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 Vtiger CRM
    Company company_name text
    Email email text
    Amount amount numeric
    Created created_at timestamp
Try interactive demo
FAQ

Klaviyo and Vtiger CRM 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 516 integrations available for Klaviyo and Vtiger CRM.

Popular · 8 of 516
All Klaviyo integrations All Vtiger CRM 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