Start with the process
The question is not which technology is generally better, but which solution serves the specific operation with the lowest overall risk. If the business follows a standard process, a mature platform may offer a quick start and predictable support.
But when a team has to maintain parallel spreadsheets, manual transfers and constant exceptions, the cost of adapting can exceed the cost of a focused application.
The real cost
For a ready-made solution, include subscriptions, per-user charges, add-ons, training and possible data export costs. For custom development, include analysis, development, hosting, maintenance, security and responsibility for future development.
A three-year comparison gives a more accurate picture. It is also worth measuring working time saved and the cost of current errors.
The middle option
Many projects do not require an all-or-nothing choice. A ready-made platform can remain the core, while a small custom application handles integration, reporting or the business's unique process.
What matters is keeping data accessible and interfaces clear. This allows the business to change gradually without being locked into a single technical direction.