Real-time
Two-way sync
Changes in Klaviyo or Linnworks instantly reflect in both systems. No stale data, no manual imports.
Business productivity ⇄ ERP
Klaviyo to Linnworks integration — real-time, two-way sync
Keep Klaviyo and Linnworks 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
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Migrated from Matillion
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Migrated from Fivetran
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Migrated from Celigo
Why teams connect Klaviyo and Linnworks
Bridge the tools people work in and the system the business runs on: real-time, two-way sync between Klaviyo and Linnworks.
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 Bridging them by hand, or by nightly file transfer, leaves each side out of date for hours at a time.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 Purchase Orders, Suppliers, Channel Listings, Returns & Refunds in Linnworks 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
- Sync orders from Linnworks into an ERP or accounting system as they are processed, without CSV exports
- Keep stock levels consistent between Linnworks and external systems so multichannel listings stay aligned with sellable stock
Where Klaviyo collects payments: transactions post through
Payment events sync into Linnworks as they occur, keeping the enterprise records current without manual entry.
Where Linnworks is the HR or people system of record
Worker and organization data from Linnworks stays current in Klaviyo, so the tools people use daily reflect the org as it actually is.
Master data corrections travel
A customer, supplier, or contact detail corrected in either system updates the other, ending duplicate maintenance.
What you can sync between Klaviyo and Linnworks
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 | Linnworks objects | |
|---|---|---|
| Catalog Items Product catalog records synced from an ERP or PIM power product blocks and back-in-stock triggers. | Shipping Services Carrier and service definitions support label and tracking data in order syncs. | |
| Tags Organizational labels on campaigns, flows, and lists support reporting rollups. | Open Orders Unshipped orders aggregated from sales channels sync into ERPs and fulfillment systems. | |
| Profiles Person records with arbitrary custom properties are the target for CRM and warehouse-sourced attributes. | Processed Orders Completed orders feed accounting and warehouse-based margin reporting. | |
| Lists Static audience memberships sync in from CRMs and forms for targeting. | Stock Items SKU records keep product data aligned with ERPs and PIMs. | |
| Segments Dynamic audiences are readable so other tools can mirror who qualifies. | Stock Levels Per-location quantities sync outward so channels and planning tools reflect current availability. | |
| Events Timestamped behavioral records tied to metrics; external order and product events are pushed in to trigger flows. | Locations Warehouse and fulfillment location records scope stock data during mapping. |
What ships with Klaviyo ⇄ Linnworks
Connect Klaviyo and Linnworks for flexible, real-time data sync.
Real-time sync, workflow automation, event queues, EDI, and monitoring, for every Klaviyo–Linnworks connection.
No-code + pro-code
Workflow automation
Trigger automated workflows whenever Klaviyo or Linnworks 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 Linnworks record.
Observability
Monitoring
Track your Klaviyo ⇄ Linnworks 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 Linnworks.
How the Klaviyo and Linnworks 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
Linnworks
- Integration surface
- REST API
- Authentication
- Application credentials and an install token exchanged for a session token
- Change detection
- Polling on order and stock endpoints
- Capabilities
- read · write
- Rate limits
- Per-endpoint rate limits apply on the Linnworks API
How it works
How to connect Klaviyo to Linnworks — 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.
- 01
Connect your apps
Authenticate Klaviyo and Linnworks with each platform's native method — OAuth, API keys, or service accounts — plus secure options like SSH tunneling, IP whitelisting, and VPC peering.
Klaviyo
connected
Linnworks
connected
OAuth 2.0SSH tunnelSSL certificateVPC peering - 02
Choose tables
Pick the Klaviyo and Linnworks 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.
objects · Klaviyo ⇄ LinnworksCustomers 12,480Sales Orders 8,213Invoices 5,902Items 1,344 - 03
Map fields
Fields map automatically even when names and types differ. Stacksync handles transformation and type casting for you, zero configuration required.
Klaviyo LinnworksCompany company_name textEmail email textAmount amount numericCreated created_at timestamp
FAQ
Klaviyo and Linnworks integration FAQ
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Yes. Stacksync provides a managed, real-time two-way integration between Klaviyo and Linnworks: authenticate both systems, choose the objects to sync (such as Klaviyo's Catalog Items and Tags), map fields visually, and changes propagate both ways in milliseconds — no code required.
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Yes. Each object mapping can be bidirectional or restricted to a single direction (both systems accept writes). Read-only mirrors, one-way pushes, and full two-way sync can be mixed in the same integration.
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Common patterns for Klaviyo and Linnworks: Where Klaviyo collects payments: transactions post through; Where Linnworks is the HR or people system of record; Master data corrections travel. Payment events sync into Linnworks as they occur, keeping the enterprise records current without manual entry.
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Klaviyo: REST API compliant with the JSON:API specification. Authentication: OAuth 2.0 for apps or private API keys. Linnworks: REST API. Authentication: Application credentials and an install token exchanged for a session token. Stacksync manages authentication, retries, and rate limits on both sides.
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Klaviyo: API versioning is handled with a date-based revision header, letting integrations pin behavior to a specific release. Linnworks: Stock is tracked per location, and channel listings are mapped to internal SKUs, which is the join integrations rely on when reconciling marketplace data. Stacksync's field mapping accounts for these differences between Klaviyo and Linnworks without custom code.
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Stacksync is SOC 2 Type II and ISO 27001 certified with HIPAA BAA support. Data is encrypted in transit, and a zero-persistent-storage architecture means Klaviyo and Linnworks records are not retained after a sync operation.
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.
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:
Related integrations
Every pair below is a real-time, two-way sync. Search all 386 integrations available for Klaviyo and Linnworks.
Popular · 8 of 386
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Klaviyo ⇄ Microsoft Dynamics NAV -
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Klaviyo ⇄ QAD ERP -
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Linnworks ⇄ Zendesk -
Linnworks ⇄ Campfire -
Linnworks ⇄ Front -
Linnworks ⇄ Amazon Seller Central
No integrations match .
