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Business productivity ⇄ ERP

Klaviyo to Unleashed Software integration — real-time, two-way sync

Keep Klaviyo and Unleashed Software 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 Klaviyo and Unleashed Software

Bridge the tools people work in and the system the business runs on: real-time, two-way sync between Klaviyo and Unleashed Software.

The ERP holds the records the business is run on, and it is rarely where day-to-day work happens. Klaviyo is closer to the work, and the two often need the same facts about the same people, organizations, and transactions. Bridging them by hand, or by nightly file transfer, leaves each side out of date for hours at a time.

Stacksync syncs Profiles, Lists, Segments, Events in Klaviyo with Warehouses, Stock Adjustments, Bills of Materials, Invoices in Unleashed Software bi-directionally and in real time, with field-level mapping and rules for which system wins on conflict. Changes made where the work happens reach the system of record within seconds, and the reverse.

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
  • Keep Products and pricing aligned between Unleashed and accounting or PIM systems.
  • Mirror Purchase Orders and supplier data to a data warehouse for procurement reporting.

Where Klaviyo faces customers and Unleashed Software carries account records

Order, invoice, or account status from Unleashed Software appears alongside the customer in Klaviyo, so front-line teams answer from live data.

Where Klaviyo collects payments: transactions post through

Payment events sync into Unleashed Software as they occur, keeping the enterprise records current without manual entry.

Where Unleashed Software is the HR or people system of record

Worker and organization data from Unleashed Software stays current in Klaviyo, so the tools people use daily reflect the org as it actually is.

What you can sync between Klaviyo and Unleashed Software

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 Unleashed Software objects
Metrics Event type definitions organize the activity stream used in segmentation and attribution. Stock Adjustments Manual quantity or value corrections synced for audit and reporting.
Campaigns Email and SMS sends expose performance data for warehouse-based reporting. Bills of Materials Production definitions used by assemblies; relevant for manufacturers syncing production data.
Flows Automation definitions and their engagement data sync outward for attribution. Invoices Sales invoices raised from orders, synced into accounting systems.
Templates Message templates are accessible via API for content management workflows. Products SKU master records with pricing, units of measure, and inventory settings.
Catalog Items Product catalog records synced from an ERP or PIM power product blocks and back-in-stock triggers. Stock On Hand Quantity and value per product per warehouse; the read source for availability syncs.
Tags Organizational labels on campaigns, flows, and lists support reporting rollups. Sales Orders Outbound orders with lines, status, and fulfillment detail; a common write target from storefronts and CRMs.
What ships with Klaviyo ⇄ Unleashed Software

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

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

Real-time

Two-way sync

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

No-code + pro-code

Workflow automation

Trigger automated workflows whenever Klaviyo or Unleashed Software 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 Unleashed Software record.

Observability

Monitoring

Track your Klaviyo ⇄ Unleashed Software 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 Unleashed Software.

How the Klaviyo and Unleashed Software 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

Unleashed Software

Integration surface
REST API
Authentication
API ID plus API key, with each request signed using an HMAC-SHA256 of the query string
Change detection
Polling with modified-date filters on list endpoints
Capabilities
read · write
Rate limits
Subject to the platform's API rate limits; paginate list endpoints and batch where possible.
How it works

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

    Choose tables

    Pick the Klaviyo and Unleashed Software 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 ⇄ Unleashed Software
    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 Unleashed Software
    Company company_name text
    Email email text
    Amount amount numeric
    Created created_at timestamp
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FAQ

Klaviyo and Unleashed Software 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 Unleashed Software.

Popular · 8 of 386
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