The custom-vs-SaaS question rarely has one answer. The right choice depends on team size, process complexity, budget horizon, and how much your operation differs from the off-the-shelf template. Off-the-shelf is usually faster to launch; custom is usually cheaper at scale and a better fit long-term.
Each comparison below covers feature parity, real pricing across pricing tiers, common limitations the SaaS marketing pages do not mention, and the specific scenarios where a custom build pays back inside 18 months. We have built or replaced versions of every tool here for NZ clients.
If you are already paying for a SaaS that does not fit your process, see our build-vs-buy framework or book a 30-minute discovery call for a tailored review.
Salesforce vs HubSpot vs Custom CRM
Compare features, pricing, and fit for growing businesses. Includes a custom-build analysis.
QuickBooks Online vs Xero vs Custom Invoicing
Compare features, pricing, and fit for growing businesses. Includes a custom-build analysis.
Asana vs Monday.com vs Custom PM Tool
Compare features, pricing, and fit for growing businesses. Includes a custom-build analysis.
Frequently asked
When should a business choose custom software over SaaS?
Custom builds make sense when your process is materially different from the SaaS template, when per-user pricing makes the SaaS expensive at scale, or when you need to integrate deeply with proprietary systems. The break-even point is usually 15-50 active users or processes worth $50k+/year in time saved.
How do you compare custom software cost to SaaS subscription cost?
Compare 3-year total cost of ownership, not month-one. SaaS looks cheap for the first year because there is no build cost. Custom looks expensive because the upfront build is front-loaded. Over 3 years, custom typically wins on TCO once you exceed 15 users and need anything beyond out-of-the-box features.
Can custom software replace tools like Salesforce, HubSpot, or Xero entirely?
Sometimes — but usually not the right move. We typically replace the workflow layer (custom UI, automations, AI extraction) and keep the system of record (Salesforce, Xero, etc.) for accounting, compliance, and reporting. This gives you the customisation of a custom build with the maturity of established platforms underneath.
How long does it take to migrate from a SaaS to a custom build?
Migration is usually 4-8 weeks of build plus 1-2 weeks of cutover. We export your existing data via the SaaS APIs, validate it, import it into the new system, and run both in parallel for a transition period. Most clients see no operational disruption.