Real-time
Two-way sync
Changes in Bill or Sage 100 instantly reflect in both systems. No stale data, no manual imports.
Accounting and finance ⇄ ERP
Bill to Sage 100 integration — real-time, two-way sync
Keep Bill and Sage 100 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 Celigo
Migrated from Heroku Connect
Migrated from Matillion
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Migrated from Fivetran
Case study
Migrated from Celigo
Why teams connect Bill and Sage 100
Keep Bill and Sage 100 agreeing on customers, invoices, and balances, whether they split the finance workload or one is replacing the other.
A dedicated finance tool and an ERP end up side by side for practical reasons: a subsidiary runs lighter software than headquarters, billing runs in a specialist system while the enterprise system holds the wider view, or the company is mid-migration and both are live. Whatever the split, the two systems describe overlapping customers and transactions, and that overlap drifts without a live connection.
Stacksync syncs Customers, Payments, Chart of Accounts, Bank Accounts in Bill with Inventory Items, Sales Orders, AR Invoices, Purchase Orders in Sage 100 in real time and in both directions. You decide which system wins on which field, and every change made in one is reflected in the other within seconds instead of at the next batch run.
Common use cases
- 01 Sync Customers and Invoices from BILL AR into a CRM or ERP so sales and finance see billing and payment status on the account.
- 02 Write Vendors created during ERP onboarding into BILL so new payees are ready to pay without manual re-entry.
- 03 Sync customers, invoices, and payment status into a CRM so sales sees AR standing without opening the ERP.
- 04 Push e-commerce and EDI orders into the Sales Order module instead of rekeying them.
Common sync patterns
Where Bill handles billing: invoices land in Sage 100
Invoices and payment activity from the billing side post through to the enterprise system automatically.
Migration without a hard cutover
When one system is replacing the other, run both in parallel with records matching until the switch is complete.
One customer and vendor master
Where both systems keep records of the same organizations, corrections made in either propagate to the other.
What you can sync between Bill and Sage 100
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 | Sage 100 objects | How this pairing syncs | |
|---|---|---|---|
| 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. | Vendors AP vendor master records synced with procurement and payment tools. | Same entity on both sides — records pair one-to-one and field-level changes reconcile in both directions. | |
| Customers AR customer master records; mapped to customer/account records in a CRM or ERP so finance and sales share one view. | Customers AR customer master records synced to CRMs for account and credit visibility. | 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. | |
| 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. | Purchase Orders Procurement documents read for spend and receiving workflows. | Bills is specific to Bill and Purchase Orders to Sage 100 — each maps to any object or custom field on the other side. | |
| Invoices Accounts-receivable invoices sent to customers; created and read via /v3/invoices to keep billing status aligned with the ERP or CRM. | GL Accounts Chart of accounts read for mapping transactions in finance integrations. | Invoices is specific to Bill and GL Accounts to Sage 100 — each maps to any object or custom field on the other side. | |
| Payments Outgoing vendor payments and received customer payments; read for reconciliation and created to schedule bill pay. | Journal Entries Posted GL activity replicated to warehouses for FP&A. | Payments is specific to Bill and Journal Entries to Sage 100 — each maps to any object or custom field on the other side. | |
| Chart of Accounts GL accounts used to code bills and invoices; typically mastered in the accounting system and written into BILL for consistent coding. | Inventory Items Item master with pricing and quantities, synced to e-commerce catalogs. | Chart of Accounts is specific to Bill and Inventory Items to Sage 100 — each maps to any object or custom field on the other side. |
How changes propagate between Bill and Sage 100
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 Sage 100 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 applied to Sage 100 as a row-level write, with types converted between the two schemas.
Sage 100 Bill Interval-based propagation
DetectionStacksync polls Sage 100 for changes on an incremental schedule, reading only records changed since the previous pass. Scheduled polling.
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.
What ships with Bill ⇄ Sage 100
Connect Bill and Sage 100 for flexible, real-time data sync.
Real-time sync, workflow automation, event queues, EDI, and monitoring, for every Bill–Sage 100 connection.
No-code + pro-code
Workflow automation
Trigger automated workflows whenever Bill or Sage 100 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 Sage 100 record.
Observability
Monitoring
Track your Bill ⇄ Sage 100 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 Sage 100.
How the Bill and Sage 100 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.
Sage 100
- Integration surface
- ODBC (ProvideX driver) for reads; Business Object Interface (BOI) or Sage-provided web services for writes
- Authentication
- Sage 100 company and user credentials; ODBC DSN credentials for direct reads
- Change detection
- Scheduled polling; no webhooks or change log on the integration surface
- Capabilities
- read · write
How it works
How to connect Bill to Sage 100 — 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 Sage 100 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
Sage 100
connected
OAuth 2.0SSH tunnelSSL certificateVPC peering - 02
Choose tables
Pick the Bill and Sage 100 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 ⇄ Sage 100Customers 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 Sage 100Company company_name textEmail email textAmount amount numericCreated created_at timestamp
FAQ
Bill and Sage 100 integration FAQ
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Yes. Stacksync provides a managed, real-time two-way integration between Bill and Sage 100: authenticate both systems, choose the objects to sync (such as Bill's Vendors and Customers), map fields visually, and changes propagate both ways in milliseconds — no code required.
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Yes — Stacksync ships production-grade connectors for both Bill and Sage 100. 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 Sage 100: Scheduled polling; no webhooks or change log on the integration surface. 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: Customers, Payments, Chart of Accounts, Bank Accounts, plus custom fields where Bill exposes them. On the Sage 100 side: Inventory Items, Sales Orders, AR Invoices, Purchase Orders. 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.
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Common patterns for Bill and Sage 100: Where Bill handles billing: invoices land in Sage 100; Migration without a hard cutover; One customer and vendor master. Invoices and payment activity from the billing side post through to the enterprise system automatically.
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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