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By Tugrul Yildirim

iPaaS vs Custom Integration: Build-or-Buy TCO Framework

Compare iPaaS, custom and hybrid integration models across TCO, governance, latency, lock-in and support.

Compare iPaaS, custom and hybrid integration models across TCO, latency, governance, compliance, lock-in and operational support.

iPaaS vs Custom Integration: Build-or-Buy TCO Framework

Key takeaways

  • iPaaS is often best for standard connectors and low-risk workflows.
  • Custom integration wins when latency, governance, recovery, compliance or domain rules are the real cost driver.
  • Hybrid architecture is common: managed connectors for commodity flows, custom code for revenue-critical CRM-ERP workflows.

Build-or-buy TCO framework

FactoriPaaSCustomHybrid
Event volumeCan grow subscription costInfrastructure tuned to workloadSplit by flow criticality
GovernanceVendor modelYour contract and logsShared
Exit riskConnector lock-inCode ownershipManaged boundary

When not to build custom

Do not build custom integration when the workflow is temporary, the connector is commodity, the error handling can stay simple, or the business cannot own ongoing support. In those cases, start with iPaaS and reserve custom work for the flows that affect revenue, compliance or customer experience.

Downloadable resources

Put this framework into numbers

Run your own assumptions through the free calculator, then validate the decision against your real architecture.

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