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Custom software vs. SaaS.

Buy when it's a commodity; build when it's your edge. The hard part is telling which is which. Here's an honest framework for the build-vs-buy decision.

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Fit · total cost of ownership · control · lock-in · differentiation

Buy your commodities. Build your advantage.

SaaS is the right answer for most things — email, payments, CRM, accounting. You should almost never build those. But where a process is your competitive edge, off-the-shelf forces you to work like everyone else.

The decision hinges on fit and differentiation, not just price. The question isn't 'is SaaS cheaper this month' — it's 'does bending our business to fit someone else's software cost us more than building software that fits us.'

Side by side.

Dimension	Custom Software	Off-the-Shelf SaaS
Fit to your process	Exact	Approximate — you adapt to it
Upfront cost	Higher	Low / none
Cost at scale	Flat-ish	Grows with seats/usage
Control + ownership	Full	Vendor-dependent
Time to value	Weeks to months	Immediate
Best for	Your differentiating workflows	Commodity functions

Show, don't tell

Run the real total cost of ownership.

SaaS feels cheaper because the cost is monthly and per-seat. Over a few years at scale, the math often flips.

tco.txtbash

1# Example: 80 seats, 3-year horizon2SaaS:    $90/seat/mo x 80 x 36       = $259,2003         + annual price increases     ≈ $290,000+45Custom:  build $120,000 (one time)6         + hosting/maintenance ~$2k/mo = $192,00078# plus: custom fits your process and you own it

The flip point

low seats / commodity need → buy

many seats / core workflow → build

run YOUR numbers before deciding

This is illustrative — real numbers depend on seats, growth, and how central the software is. Our cost calculator helps you run yours.

The hidden cost of lock-in

With SaaS, you rent the rules too.

Pricing changes, deprecated features, data you can't fully export, and a roadmap you don't control are all part of the SaaS bargain.

For commodity functions that's a fine trade. For the workflow that is your business, owning the software means owning your own destiny.

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A simple rule

If the software runs a commodity function (email, payments, accounting), buy it. If it runs the process that differentiates you — or SaaS is forcing you to work in a way that hurts — build it.

Common questions.

Isn't building always more expensive?

Up front, usually. But per-seat SaaS at scale plus the cost of bending your business to fit it can exceed a custom build over a few years. Run the TCO for your situation.

Can we do both?

Almost always, and you should. Buy commodity SaaS and build only the differentiating pieces — often integrating the two.

What if SaaS almost fits?

'Almost' is the danger zone — workarounds, manual glue, and frustration. Sometimes a thin custom layer on top of SaaS is the sweet spot; we help you find it.

How do we decide?

Talk it through with us, or run the numbers in our cost calculator. We'll give you an honest build-vs-buy read.

Build or buy? Let's figure it out.

Tell us the function and your scale. We'll give you a straight build-vs-buy recommendation — including 'just buy the SaaS.'

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