Feature/Factor Build Accounting Software Buy Accounting Software
CustomizationFully tailored to internal workflows Limited to vendor’s feature set
Implementation Time 6–12 months A few days to weeks
Upfront Cost High (design + development) Low (subscription or license fee)
Maintenance Internal responsibility Vendor-managed
Compliance Updates Must be handled manuallyIncluded with product
Integrations Custom APIs with any internal system Limited to supported apps
Scalability Custom-built to scale with business May require plan upgrades
Data Ownership Fully owned and controlled Shared with vendor/cloud host
Support and Training Must be built internally Provided by vendor