SaaS vs. Custom Software — Buy or Build?
SaaS wins for standard workflows. Custom wins when the workflow is your competitive advantage — or when platform costs compound faster than a build.
Last updated: April 2026
Most businesses start with SaaS tools. Most successful businesses eventually hit a ceiling on those tools. Here's how to know when that ceiling is yours.
Off-the-Shelf SaaS
- Available immediately — no build time
- Someone else handles infrastructure and maintenance
- Lower upfront cost
- Proven workflows built into the product
- Per-seat or per-transaction pricing grows with your revenue
- You adapt your workflow to the tool, not the reverse
- You don't own the data or the product
- Platform risk — price increases, shutdowns, feature removal
Custom Software
- Built exactly for your workflow
- You own the code and the data
- No recurring platform fees after the build
- Competitive moat if the workflow is your differentiator
- Higher upfront cost
- You're responsible for maintenance
- Takes weeks to months to build
- Wrong choice for standard workflows SaaS handles fine
Booking, ordering, or any workflow where platform commission or rigidity is costing you money: custom. Standard email, analytics, communication tools: SaaS. The break-even is usually 18–24 months of platform fees vs a one-time build.
Off-the-Shelf SaaS vs Custom Software — which should I choose?
SaaS wins for standard workflows. Custom wins when the workflow is your competitive advantage — or when platform costs compound faster than a build.
When does Off-the-Shelf SaaS make sense over Custom Software?
Booking, ordering, or any workflow where platform commission or rigidity is costing you money: custom. Standard email, analytics, communication tools: SaaS. The break-even is usually 18–24 months of platform fees vs a one-time build.
I help businesses calculate the actual build vs. buy cost. Let's run the numbers on your case.