The Challenge
A global leader in AP automation—processing hundreds of millions of invoices annually for thousands of customers—had a gap in their integration catalog. They supported 250+ ERPs and accounting systems, but two products remained stubbornly out of reach: Sage 300 CRE (Construction Real Estate) and Sage 100 Contractor.
These aren't obscure systems. They're the backbone of financial operations for thousands of construction companies, general contractors, and specialty trades across North America. But they're notoriously difficult to integrate with:
- No modern API — Both products rely on Pervasive SQL databases with proprietary schemas
- On-premise only — No cloud connectivity out of the box
- Complex data structures — Job costing, subcontractor management, retainage, and AIA billing don't map cleanly to standard AP workflows
- Limited documentation — Sage's integration resources for these legacy products are sparse
The result: the automation platform had been manually processing invoices for the few construction customers they'd taken on. It was a loss leader at best. They'd stopped pursuing this segment entirely because they couldn't support it at scale.
Our Approach
We knew these Sage products well. The challenge wasn't just technical—it was understanding how construction accounting actually works. Job cost structures, progress billing, lien waivers, and retention all have specific workflows that generic AP automation can't handle out of the box.
We started by mapping the data models in both Sage products and identifying exactly what needed to flow in each direction.
The Solution
We built a custom middleware layer that bridges the gap between the automation platform and Sage's on-premise databases:
Integration Architecture
- .NET framework middleware deployed alongside Sage installations
- Direct SQL Server connectivity to Sage's Pervasive databases
- Secure data synchronization with the cloud-based automation platform
Business Logic Layer
- Invoice matching against Sage job cost structures
- Vendor master synchronization with subcontractor records
- Payment posting back to Sage with proper job/cost code allocation
- Handling of construction-specific workflows (retainage, progress billing)
Audit & Compliance
- Complete audit trail for every transaction
- Error handling and exception reporting
- Data validation to ensure Sage's accounting rules are respected
The Results
The integration transformed what had been a manual, loss-making process into a fully automated workflow.
Immediate Impact:
- Construction and contractor customers can now be onboarded like any other segment
- End-to-end automation from invoice capture through payment posting
- No more manual data entry or workarounds for Sage customers
Strategic Value:
- Opened an entirely new market segment—construction and specialty trades
- Differentiation from competitors who still can't support these Sage products
- Revenue potential in the millions as they pursue customers they previously had to turn away
For an integration that "couldn't be done," it's now live in production and processing invoices automatically. Sometimes the hardest problems are just the ones no one has prioritized.