Custom software vs SaaS: a decision checklist for Hong Kong businesses
Compare SaaS, custom software and a hybrid approach through workflow fit, integration, permissions, total cost and exit arrangements.
Author：WeTech technical team · Updated： (Hong Kong time (GMT+8))
Evaluate SaaS first when standard functionality meets the workflow. Consider custom software when a core process has material differences or access and integration requirements that available products cannot meet. A hybrid can keep SaaS as the base and add a tailored portal or integration layer. Include maintenance capacity and data-exit cost in the decision.
When to use this guide
For teams replacing CRM, order or internal management systems, including businesses already using several SaaS tools with manual data transfers.
Compare three approaches
| Approach | Better fit | Confirm first |
|---|---|---|
| SaaS | Standard workflows served by existing modules | Plan permissions, APIs, exports and usage charges |
| Custom software | Distinct core workflows with a sustained need | Product owner, maintenance capacity and handover |
| Hybrid | SaaS handles the core with a bounded gap | System boundaries, duplicate data and version changes |
Test fit with actual work
Run one complete workflow through the candidate tools, including exceptions, roles and reporting. Classify gaps as configurable, solvable through integration or incompatible with core logic. Include manual corrections and their error risk in the comparison. A feature checklist cannot show whether staff can finish a real task without repeated exports, spreadsheet fixes or duplicate entry.
Use the same ownership period
Choose one comparison period and include subscriptions, configuration, integration, migration, training, support and exit. Custom systems also need hosting and ongoing maintenance. Keep usage scenarios where volumes are uncertain. Check how additional users, API calls and exports affect the chosen plans. State assumptions rather than treating an introductory subscription price as the full operating cost.
Planning example: keep CRM and tailor an approval portal
Suppose a standard CRM already manages customers and sales, while an unusual discount approval needs evidence from several departments. Test configuration first, then compare an integration with a separate approval portal. Assign one authoritative owner for customer master data. This illustrative scenario supports selection and does not describe an existing client delivery or promise that a specific CRM supports every requirement.
Frequently asked questions
Is SaaS always cheaper?
Compare the same period and scope, including integration, manual workarounds, usage and exit costs.
Does source code eliminate supplier dependency?
Documentation, deployment knowledge, accounts and third-party licences also matter. Verify that a successor can rebuild and operate the system.
Can we start with SaaS and customise later?
It can be planned. Check exports, APIs, identifiers and migration arrangements early to reduce rework.
Brand and public case scope
WeTech Consulting, also called WeTech or WeTech AI HK, provides AI and IT consulting in Hong Kong. WeProperty HK and WeCredit HK are self-developed products. Their cases support the observable features listed: property, estate and transaction-reference entry points for WeProperty; submission, review and public-data masking for WeCredit. WeCredit is not a TU credit-rating service or a final determination of facts.
WeProperty HK · WeCredit HK (case studies in Traditional Chinese)
Reference sources
Official documents support the technical, risk and measurement concepts. Checklists, estimation methods and illustrative scenarios are WeTech planning recommendations, not official prices or client results. Check the supplier’s current plan and terms. Sources reviewed: (GMT+8)
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