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Accounting and finance

Coupa to Rillet integration — real-time, two-way sync

Keep Coupa and Rillet in sync without custom scripts. Cut weeks of integration work, eliminate silent data drift, and give your team a single, reliable source of truth.

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Adopted by fast-scaling companies moving mission-critical data in real time

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Why teams connect Coupa and Rillet

Keep the customer, invoice, and payment records that Coupa and Rillet share consistent in real time, whether the two systems split your finance stack or one is replacing the other.

Two finance systems in one company usually means one of two setups. Either the systems divide the work, with one issuing invoices or serving a business unit while the other holds the books, or one is on its way out and both must stay accurate during the transition. In both cases, the customer, invoice, and payment records the two systems share start to drift the moment updates are keyed twice or moved by hand.

Stacksync syncs Contracts, Expense Reports, Requisitions, Purchase Orders in Coupa with Charge, Reimbursement, Custom Field, Account in Rillet bi-directionally and in real time. A record created or corrected in either system appears in the other within seconds, with field-level mapping and conflict resolution in place of CSV exports and nightly batch jobs.

That matters most at close. When both systems agree on who was billed, what was paid, and what is outstanding, reconciliation stops being a hunt for which copy of the truth is current.

Common use cases

  • 01 Mirror Purchase Orders and their status into an operational Postgres database for spend reporting and three-way match analytics.
  • 02 Export approved Invoices and their lines from Coupa into an accounting/ERP system to drive the AP pay cycle and GL posting.
  • 03 Mirror journal entries and contract revenue data into a warehouse for board and ARR reporting.
  • 04 Push billing events from a product or usage-metering system into Rillet for revenue recognition.

Common sync patterns

Where Coupa issues invoices and Rillet holds the books

Invoices and payments recorded on the billing side land in the system of record automatically, so revenue is captured once and correctly.

Parallel run during a migration

When one system is replacing the other, keep both live and matching through the cutover, so no transaction falls between the last export and go-live.

One customer master

A customer's name, billing details, or payment terms corrected in either system update the other immediately, so the next invoice always uses current information.

What you can sync between Coupa and Rillet

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.

Coupa objects Rillet objects How this pairing syncs
Invoices Supplier/AP invoices with lines and approval status; polled out to accounting and ERP systems for the pay cycle, or created through the API. Invoice Synced with incremental and full sync per the Stacksync docs. Same entity on both sides — records pair one-to-one and field-level changes reconcile in both directions.
Accounts Chart-of-accounts segments and GL codes; usually mastered in the ERP and written into Coupa so requisitions and invoices code correctly. Account Synced with incremental and full sync per the Stacksync docs. Same entity on both sides — records pair one-to-one and field-level changes reconcile in both directions.
Contracts Supplier contract records with terms and dates; read out for reporting or created from a CLM system. Custom Field Synced with incremental and full sync per the Stacksync docs. Contracts is specific to Coupa and Custom Field to Rillet — each maps to any object or custom field on the other side.
Expense Reports Employee expense reports and their lines; exported to AP or ERP for reimbursement and GL posting. Customer Synced with incremental and full sync per the Stacksync docs. Expense Reports is specific to Coupa and Customer to Rillet — each maps to any object or custom field on the other side.
Requisitions Employee purchase requests with lines and approval chains; read out to warehouses, or created via the API from upstream intake tools. Vendor Synced with incremental and full sync per the Stacksync docs. Requisitions is specific to Coupa and Vendor to Rillet — each maps to any object or custom field on the other side.
Purchase Orders PO headers and lines; synced two-way with ERPs so orders raised in Coupa flow to the ledger and status updates flow back on the /purchase_orders resource. Credit Memo Synced with incremental and full sync per the Stacksync docs. Purchase Orders is specific to Coupa and Credit Memo to Rillet — each maps to any object or custom field on the other side.

How changes propagate between Coupa and Rillet

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.

Coupa Rillet Interval-based propagation

DetectionStacksync polls Coupa for changes on an incremental schedule, reading only records changed since the previous pass. Polling on updated-at and created-at filters (e.g.

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

Rillet Coupa Sub-second propagation

DetectionRillet pushes changes as they happen — webhook events backed by change data capture. Near real-time updates via change tracking.

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

Rate-limit considerations

  • Coupa: Coupa does not publish explicit rate limits or expose X-RateLimit/Retry-After headers; integrations page 50 records at a time and back off on 429/503 responses.
  • Rillet: Subject to the platform's API rate limits.
What ships with Coupa ⇄ Rillet

Connect Coupa and Rillet for flexible, real-time data sync.

Real-time sync, workflow automation, event queues, EDI, and monitoring, for every Coupa–Rillet connection.

Real-time

Two-way sync

Changes in Coupa or Rillet instantly reflect in both systems. No stale data, no manual imports.

No-code + pro-code

Workflow automation

Trigger automated workflows whenever Coupa or Rillet 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 Coupa or Rillet record.

Observability

Monitoring

Track your Coupa ⇄ Rillet sync health, view errors, and replay failed events in one click.

Trading partners

EDI

Transform legacy EDI complexity into simple database interactions between Coupa and Rillet.

How the Coupa and Rillet connectors work

Coupa

Integration surface
REST Core API (JSON or XML)
Authentication
OAuth 2.0 / OIDC via the client-credentials grant; scopes take the service.object.right form (e.g. core.accounting.read, core.accounting.write). Legacy API keys are being retired (no new keys since R34; API-key auth unsupported from R36). Access tokens last 24 hours.
Change detection
Polling on updated-at and created-at filters (e.g. updated-at[gt]=<timestamp>); Coupa has no native webhook subscriptions, though admins can configure outbound Call Out / external notifications.
Capabilities
read · write
Rate limits
Coupa does not publish explicit rate limits or expose X-RateLimit/Retry-After headers; integrations page 50 records at a time and back off on 429/503 responses.

Rillet

Integration surface
REST API (OpenAPI-specified, with production and sandbox environments)
Authentication
API key generated in Rillet (Organization Setting -> API Access); uncheck Read Only for bidirectional sync, check Read Only for one-way sync
Change detection
Near real-time updates via change tracking; incremental sync per object, with delete detection (some objects checked every 1h or 4h)
Capabilities
read · write · CDC · webhooks
Rate limits
Subject to the platform's API rate limits.
Rillet setup guide
How it works

How to connect Coupa to Rillet — 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 Coupa and Rillet 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
    Coupa connected
    Rillet connected
    OAuth 2.0
    SSH tunnel
    SSL certificate
    VPC peering
  2. 02

    Choose tables

    Pick the Coupa and Rillet 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 · Coupa ⇄ Rillet
    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
    Coupa Rillet
    Company company_name text
    Email email text
    Amount amount numeric
    Created created_at timestamp
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FAQ

Coupa and Rillet 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.

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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

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