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Business productivity ⇄ Accounting and finance

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

Keep Customer.io and Workday 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 Workday

Connect the financial records in Workday with the work happening in Customer.io, so both stay current without exports or copy-paste.

Workday holds the financial truth: who the customers are, what they were billed, what they paid. Customer.io is where part of the day-to-day work happens, and that work often involves the same customers and transactions. Without a live connection, the two drift apart, and people end up answering questions from stale copies.

Stacksync keeps Workers, Organizations, Positions, Compensation in Workday and Broadcasts, Deliveries / Messages, Newsletters, People in Customer.io in sync, bi-directionally and in real time. Whatever records Customer.io keeps and whatever events it produces, the overlap with Workday is mapped field by field, and a change on either side shows up on the other within seconds.

There is no middleware to build, no API rate limits to babysit, and no nightly job that leaves the morning running on yesterday's data.

Common use cases

  • Sync worker records from Workday into IT and identity systems so hires, transfers, and terminations provision access automatically.
  • Replicate worker, organization, and compensation data into a secured database for people analytics without giving analysts tenant access.
  • 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.

Where Customer.io collects payments or triggers charges: events land in Workday

Payment and charge activity flows into Workday as it happens, so the books reflect reality without manual reconciliation.

Where Customer.io tracks people or companies: one identity

A customer's details updated in either system update the other, so finance and the rest of the business stop maintaining two versions of the same customer.

Where Customer.io handles customer conversations: billing context in view

Front-line teams see invoice and payment status from Workday next to the customer they are helping, without logging into the finance system.

What you can sync between Customer.io and Workday

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 Workday objects
Newsletters Recurring email sends with performance metrics available for reporting syncs. Customers and Invoices Financials receivables objects synced for billing visibility where Workday Financials is used.
People Profiles with attributes, matched on identifiers like id or email; the main write target of data syncs. Journal Entries Accounting entries imported from external subledgers into Workday Financials.
Objects Non-person entities such as accounts or companies, related to people for account-level messaging. Custom Reports (RaaS) Tenant-defined reports exposed as web service endpoints, often the practical read surface for syncs.
Events Behavioral events sent via the Track API that trigger campaigns. Workers The central HCM record covering employment, job, and personal data; the anchor of most syncs.
Segments Attribute- or event-based groups; data syncs feed the attributes segments evaluate. Organizations Supervisory and company hierarchies read to drive routing and reporting in other systems.
Campaigns Automated workflows whose membership and metrics can be read via the App API. Positions Job seats synced with recruiting and planning tools.
What ships with Customer.io ⇄ Workday

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

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

Real-time

Two-way sync

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

No-code + pro-code

Workflow automation

Trigger automated workflows whenever Customer.io or Workday 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 Workday record.

Observability

Monitoring

Track your Customer.io ⇄ Workday 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 Workday.

How the Customer.io and Workday 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

Workday

Integration surface
SOAP Workday Web Services (WWS), a REST API, and Reports-as-a-Service (RaaS) endpoints for custom reports
Authentication
OAuth 2.0 for the REST API; integration system users with WS-Security or certificate-based auth for SOAP
Change detection
Polling, including transaction-log criteria on SOAP operations to fetch objects changed since a given moment; no general webhook surface
Capabilities
read · write
How it works

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

    Choose tables

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

Customer.io and Workday 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 Workday.

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