Real-time
Two-way sync
Changes in Bill or Rillet instantly reflect in both systems. No stale data, no manual imports.
Accounting and finance
Bill to Rillet integration — real-time, two-way sync
Keep Bill 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.
- 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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Migrated from MuleSoft
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Migrated from Fivetran
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Migrated from Celigo
Why teams connect Bill and Rillet
Keep the customer, invoice, and payment records that Bill 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 Vendors, Invoices, Customers, Payments in Bill with Customer, Vendor, Invoice, Credit Memo 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 Read approved Bills and their line items into a Postgres warehouse for spend, accrual, and cash-flow reporting without CSV exports.
- 02 Sync Customers and Invoices from BILL AR into a CRM or ERP so sales and finance see billing and payment status on the account.
- 03 Keep customers and invoices aligned between Rillet and a CRM so finance and sales work from the same account records.
- 04 Mirror journal entries and contract revenue data into a warehouse for board and ARR reporting.
Common sync patterns
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.
Payment status everywhere
A payment applied in one system updates the matching invoice in the other, so no one chases a balance that was already settled.
Entity or business-unit roll-up
Where each system serves a different entity or unit, sync the shared records so group-level reporting starts from consistent data.
What you can sync between Bill 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.
| Bill objects | Rillet objects | How this pairing syncs | |
|---|---|---|---|
| Bills Accounts-payable amounts owed to vendors, with bill line items; read and created via /v3/bills and pulled incrementally by filtering on createdTime/updatedTime. | Bill 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. | |
| Vendors Payee master records; synced two-way with vendor/supplier tables in an ERP or accounting system so new payees don't have to be re-keyed. | Vendor 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. | |
| Invoices Accounts-receivable invoices sent to customers; created and read via /v3/invoices to keep billing status aligned with the ERP or CRM. | 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. Custom fields on either side are included in the mapping. | |
| Customers AR customer master records; mapped to customer/account records in a CRM or ERP so finance and sales share one view. | Customer 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. Custom fields on either side are included in the mapping. | |
| Bank Accounts Funding and deposit accounts; read to reconcile payments and posted transactions against the ledger. | Charge Synced with incremental and full sync per the Stacksync docs. | Bank Accounts is specific to Bill and Charge to Rillet — each maps to any object or custom field on the other side. | |
| Vendor Credits and Credit Memos AP and AR adjustments applied against bills and invoices; synced so balances stay accurate on both sides. | Reimbursement Synced with incremental and full sync per the Stacksync docs. | Vendor Credits and Credit Memos is specific to Bill and Reimbursement to Rillet — each maps to any object or custom field on the other side. |
How changes propagate between Bill 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.
Bill Rillet Sub-second propagation
DetectionBill notifies Stacksync of record changes through webhook events. Webhook event subscriptions (POST /v3/subscriptions) for bills, vendors, payments, invoices, and bank accounts, with polling on.
DeliveryEach detected change is written to Rillet through its API, with automatic retries and rate-limit backoff.
Rillet Bill 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 Bill through its API, with automatic retries and rate-limit backoff.
Rate-limit considerations
- Bill: 20,000 requests per developer key per hour; login (POST /v3/login) capped at 200/hour; maximum 3 concurrent requests per developer key per organization. Spend & Expense API is a separate token at 60 calls/token/minute.
- Rillet: Subject to the platform's API rate limits.
What ships with Bill ⇄ Rillet
Connect Bill and Rillet for flexible, real-time data sync.
Real-time sync, workflow automation, event queues, EDI, and monitoring, for every Bill–Rillet connection.
No-code + pro-code
Workflow automation
Trigger automated workflows whenever Bill 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 Bill or Rillet record.
Observability
Monitoring
Track your Bill ⇄ Rillet sync health, view errors, and replay failed events in one click.
Trading partners
EDI
Transform legacy EDI complexity into simple database interactions between Bill and Rillet.
How the Bill and Rillet connectors work
Bill
- Integration surface
- REST/JSON (BILL v3 Connect API)
- Authentication
- Session-based: POST /v3/login with username, password, organizationId, and a developer key (devKey) returns a sessionId that is passed with the devKey as headers on every subsequent call; OAuth is available for partner/embedded apps
- Change detection
- Webhook event subscriptions (POST /v3/subscriptions) for bills, vendors, payments, invoices, and bank accounts, with polling on createdTime/updatedTime list filters as the fallback
- Capabilities
- read · write · webhooks
- Rate limits
- 20,000 requests per developer key per hour; login (POST /v3/login) capped at 200/hour; maximum 3 concurrent requests per developer key per organization. Spend & Expense API is a separate token at 60 calls/token/minute.
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.
How it works
How to connect Bill 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.
- 01
Connect your apps
Authenticate Bill 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.
Bill
connected
Rillet
connected
OAuth 2.0SSH tunnelSSL certificateVPC peering - 02
Choose tables
Pick the Bill 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.
objects · Bill ⇄ RilletCustomers 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.
Bill RilletCompany company_name textEmail email textAmount amount numericCreated created_at timestamp
FAQ
Bill and Rillet integration FAQ
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Yes. Stacksync provides a managed, real-time two-way integration between Bill and Rillet: authenticate both systems, choose the objects to sync (such as Bill's Bills and Vendors), map fields visually, and changes propagate both ways in milliseconds — no code required.
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Stacksync pricing is usage-based and starts at $1,000/month, including the managed Bill and Rillet connectors, real-time two-way sync, monitoring, and support. That replaces building and maintaining a custom Bill–Rillet integration in-house.
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Yes — Stacksync ships production-grade connectors for both Bill and Rillet. The connectors handle authentication, schema detection, rate limits, and retries; you configure the sync, and Stacksync operates it.
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Change detection on Bill: Webhook event subscriptions (POST /v3/subscriptions) for bills, vendors, payments, invoices, and bank accounts, with polling on createdTime/updatedTime list filters as the fallback. On Rillet: Near real-time updates via change tracking; incremental sync per object, with delete detection (some objects checked every 1h or 4h). Each detected change propagates to the other side in milliseconds, with field-level conflict resolution and an inspectable event log.
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On the Bill side: Vendors, Invoices, Customers, Payments, plus custom fields where Bill exposes them. On the Rillet side: Customer, Vendor, Invoice, Credit Memo. Stacksync auto-detects both schemas and converts types between the two systems.
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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.
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.
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:
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