Map the friction first
Describe where information gets re-entered, where approvals stall and where people work around the tools. Separate essential business differences from habits that could change. A focused integration may solve more than a replacement platform.
Compare complete costs
Subscription seats are only one part of the picture. Compare implementation, migration, training, integrations, maintenance and infrastructure over a realistic planning horizon. Test assumptions about team growth and changing scope.
Choose a useful boundary
SaaS can be an excellent fit for standard needs. Tailor-made software can make sense where workflows create meaningful differentiation. Often the strongest solution connects both. Confirm licensing, data portability and ownership terms before committing.