Every operations director eventually faces the same crisis: the CRM does not talk to the billing system, the billing system does not talk to fulfillment, and a small army of people is copy-pasting between tabs to keep them all roughly in sync. The instinct is to rip everything out and replace it with one mega-platform. Usually that is the wrong instinct.
Why "one platform to rule them all" rarely works
A consolidation play replaces three good-enough systems with one system that is mediocre at three things. It demands a multi-year migration during which both versions of the truth coexist. It hands you a single vendor lock-in profile that is harder to negotiate than three smaller ones. And it usually does not address the actual problem, which is data flow, not data location.
What we build instead
In most integration engagements we build a thin custom middleware layer that owns three jobs:
Canonical data model. One representation of "customer," "order," "invoice," and "shipment" that the middleware enforces. Each downstream system maps to and from it. No more arguments about which CRM field is the right one.
Event routing. When a sale closes in the CRM, the middleware fires the events that create the invoice, allocate inventory, and schedule the fulfillment. No human copy-paste, and no fragile point-to-point integrations that break the next time a vendor changes their API.
Audit trail and reconciliation. Every event is logged. Every cross-system discrepancy is detected and surfaced. The middleware is the source of truth about what the source of truth should have been.
Built well, that layer is usually 4,000 to 15,000 lines of code — small enough that one engineer can hold the whole thing in their head, big enough to replace months of manual reconciliation work permanently.
If your team is currently running on a tab-juggling routine, the answer is almost never another platform purchase. It is the small piece of custom infrastructure that makes the platforms you already paid for actually work together.