iPaaS — Integration Platform as a Service
⚠️ Source Note: Extracted from TradeCentric vendor blog (TradeCentric is an iPaaS provider for B2B eProcurement). Category definitions are accurate industry usage. All vendor promotion stripped. Do not attribute to Justin King or B2BEA.
iPaaS (Integration Platform as a Service) is a cloud-based service that enables otherwise incompatible applications and platforms to communicate and exchange data. The iPaaS vendor manages the infrastructure, protocol translation, data mapping, and maintenance — client organizations connect their systems to the iPaaS once, and the platform handles integration complexity on their behalf.
In B2B commerce, iPaaS is the middleware layer that connects supplier eCommerce systems to buyer eProcurement platforms, ERP systems, and financial software.
The Problem iPaaS Solves
A mid-market B2B distributor may have 200+ enterprise customers running procurement on a mix of SAP Ariba, Coupa, Jaggaer, Oracle Procurement, Workday, and dozens of smaller platforms. Each platform uses different protocols (cXML, OCI, EDI, JSON), different data formats, and different document structures.
Without iPaaS, supporting this landscape requires:
- Custom development work for each buyer connection (weeks to months per integration)
- Ongoing IT maintenance as platforms update and buyers change systems
- Dedicated specialist staff (potentially 2–3 FTEs for a medium-large supplier)
- High risk of integration breaks when either party upgrades their platform
With iPaaS, the supplier integrates once to the iPaaS platform. The iPaaS provider maintains pre-built connectors to all major eProcurement systems and handles the protocol translation, data mapping, and maintenance. New buyer connections can be activated without custom development.
What B2B-Specific iPaaS Handles
In the B2B eProcurement context, an iPaaS platform manages:
- Protocol translation — converting between cXML, OCI, EDI X12, JSON, CSV, and other formats
- Data mapping — transforming field names, data structures, and values between systems
- PunchOut management — handling authentication, session management, and cart transfer
- PO automation — routing approved purchase orders from buyer eProcurement to supplier OMS/ERP
- Invoice automation — transmitting electronic invoices from supplier to buyer’s AP system
- ASN routing — sending Advanced Shipping Notices electronically
- 3-way match support — providing the data needed for buyer-side reconciliation
- Error handling and alerting — flagging failed transactions for resolution
- Analytics — visibility into transaction volume, error rates, partner performance
iPaaS vs. Custom Integration vs. EDI VAN
iPaaS
Custom Integration
EDI VAN
Setup per partner
Pre-built connectors; fast
Custom dev for each connection
Network-based but EDI-only
Protocols supported
cXML, OCI, EDI, JSON, API
Whatever you build
EDI X12, EDIFACT
Maintenance
Managed by vendor
Managed by client IT
Managed by VAN provider
eCommerce/PunchOut support
Yes
Yes (if you build it)
No
Cost model
SaaS subscription
In-house IT / dev costs
Per-transaction + setup
Time to new connection
Days to weeks
Weeks to months
Weeks
Key iPaaS Capabilities to Evaluate
- Connector breadth — how many eProcurement platforms and eCommerce systems have pre-built connectors?
- Partner enablement support — does the vendor help onboard and test connections with trading partners?
- Analytics and visibility — can you see transaction status, error rates, and volume by partner?
- Security certifications — ISO 27001, SOC 2 Type II for handling financial data
- Scalability — can the platform handle transaction growth without degradation?
B2B iPaaS Providers
The major players specifically in B2B eProcurement/eCommerce integration:
- TradeCentric (formerly PunchOut2Go) — PunchOut and P2P automation specialist
- Corevist — focused on SAP-connected commerce
- Greenwing Technology — PunchOut and procurement integration
- Boomi, MuleSoft, Informatica — general-purpose iPaaS (not B2B procurement specialists)