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Business productivity ⇄ ERP

Customer.io to Plex ERP integration — real-time, two-way sync

Keep Customer.io and Plex ERP 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 Customer.io and Plex ERP

Bridge the tools people work in and the system the business runs on: real-time, two-way sync between Customer.io and Plex ERP.

The ERP holds the records the business is run on, and it is rarely where day-to-day work happens. Customer.io 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 Bridging them by hand, or by nightly file transfer, leaves each side out of date for hours at a time.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 Deliveries / Messages, Newsletters, People, Objects in Customer.io with Customers, Suppliers, Shipments, Quality records in Plex ERP 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

  • Land delivery and engagement events (sent, opened, clicked, bounced) from reporting webhooks into a warehouse for attribution analysis.
  • Keep unsubscribe and subscription-preference state consistent between Customer.io and the CRM to avoid compliance gaps.
  • Mirror purchase orders and receipts to accounting or planning tools.
  • Feed quality and scrap data to dashboards supervisors check without logging into Plex.

Where Customer.io collects payments: transactions post through

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

Where Plex ERP is the HR or people system of record

Worker and organization data from Plex ERP stays current in Customer.io, 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 Customer.io and Plex ERP

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.

Customer.io objects Plex ERP objects
Deliveries / Messages Per-recipient message records whose lifecycle events flow out through reporting webhooks. Suppliers Vendor records aligned with procurement and AP tools
Newsletters Recurring email sends with performance metrics available for reporting syncs. Shipments Outbound logistics records synced to trading partners and tracking systems
People Profiles with attributes, matched on identifiers like id or email; the main write target of data syncs. Quality records Checksheet and inspection data pulled into plant dashboards
Objects Non-person entities such as accounts or companies, related to people for account-level messaging. Parts Item master records shared with CRM, e-commerce, and planning tools
Events Behavioral events sent via the Track API that trigger campaigns. Inventory On-hand balances and locations replicated for visibility outside the plant system
Segments Attribute- or event-based groups; data syncs feed the attributes segments evaluate. Production jobs Shop-floor work records combining ERP and MES data for output reporting
What ships with Customer.io ⇄ Plex ERP

Connect Customer.io and Plex ERP for flexible, real-time data sync.

Real-time sync, workflow automation, event queues, EDI, and monitoring, for every Customer.io–Plex ERP connection.

Real-time

Two-way sync

Changes in Customer.io or Plex ERP instantly reflect in both systems. No stale data, no manual imports.

No-code + pro-code

Workflow automation

Trigger automated workflows whenever Customer.io or Plex ERP 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 Customer.io or Plex ERP record.

Observability

Monitoring

Track your Customer.io ⇄ Plex ERP sync health, view errors, and replay failed events in one click.

Trading partners

EDI

Transform legacy EDI complexity into simple database interactions between Customer.io and Plex ERP.

How the Customer.io and Plex ERP connectors work

Customer.io

Integration surface
REST APIs split by purpose: Track API for data ingestion, App API for campaigns, people lookups, and messages
Authentication
Basic auth with site ID and API key for the Track API; bearer token for the App API
Change detection
Reporting webhooks push message and delivery events; person attribute changes are not streamed and require source-side detection
Capabilities
read · write · webhooks
Rate limits
Subject to per-API rate limits documented by Customer.io

Plex ERP

Integration surface
REST APIs plus legacy SOAP web services
Authentication
API keys issued through the Plex Developer Portal
Change detection
polling; no general-purpose change webhooks
Capabilities
read · write
Rate limits
subject to the platform's API rate limits
How it works

How to connect Customer.io to Plex ERP — 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 Customer.io and Plex ERP 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
    Customer.io connected
    Plex ERP connected
    OAuth 2.0
    SSH tunnel
    SSL certificate
    VPC peering
  2. 02

    Choose tables

    Pick the Customer.io and Plex ERP 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 · Customer.io ⇄ Plex ERP
    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
    Customer.io Plex ERP
    Company company_name text
    Email email text
    Amount amount numeric
    Created created_at timestamp
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FAQ

Customer.io and Plex ERP 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 Customer.io and Plex ERP.

Popular · 8 of 386
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