Build in-house, buy a single tool, or subscribe on a marketplace?

A custom script to read invoices or route approvals looks cheap the day it ships. The real cost shows up later: the developer who wrote it moves to another project, the input format changes, and nobody owns the fix. Maintenance is rarely budgeted up front, so it gets paid for anyway, just later and grudgingly.

For a task like document processing, where input formats drift constantly, in-house tools tend to degrade quietly until someone notices the error rate has crept up.

A single-vendor automation platform solves the maintenance problem, at the cost of a new one: your workflows and data now live inside one company's product. Leaving means rebuilding everything, so pricing and roadmap decisions you disagree with get absorbed instead of renegotiated.

A marketplace of independently graded functions avoids this by design: switching to a different listed function for the same task costs a configuration change, not a migration project.

A subscription is a bet that you'll use enough of a tool to justify a fixed monthly cost. Pay-per-use removes that bet: a slow month costs less, and a function that turns out to be the wrong fit costs nothing more to stop using than the runs you already spent.