Build vs Buy: how to decide, without the vendor bias
Most 'build vs buy' advice comes from someone selling one side. We do both — here's the honest framework we use with clients.
Every software decision comes down to a trade-off between speed, cost, and fit. Buying gets you live fastest and cheapest upfront. Building gives you exact fit and full ownership. The right answer depends on whether the software is a differentiator for your business — or just plumbing.
Four questions that settle most decisions
Is it a differentiator?
If the software is part of what makes you win, build it. If it is undifferentiated (email, payroll), buy it.
How fast do you need it?
Buying can be live in days. Building takes weeks to months. Urgency pushes toward buy — or buy-then-extend.
How deeply must it integrate?
Heavy integration with unusual internal systems favours building; standalone needs favour buying.
What is the 3–5 year TCO?
Per-seat SaaS is cheap at 10 users, expensive at 1,000. Model total cost over years, not the first invoice.
Build vs Buy at a glance
| Factor | Buy (off-the-shelf) | Build (custom) |
|---|---|---|
| Time to live | Days–weeks | Weeks–months |
| Upfront cost | Low | Higher |
| Long-term cost | Per-seat, grows with scale | Fixed asset you own |
| Fit to your workflow | Compromise | Exact |
| Ownership & IP | Vendor | Yours |
| Differentiation | None | Potential moat |
The often-overlooked third option: buy then extend — start with a product for speed, then customise or white-label it for fit. That's how a lot of our engagements work.
We're on both sides of the table
Build vs Buy — frequently asked questions
Buying is usually cheaper upfront and faster to deploy; building costs more initially but avoids per-seat fees and fits your exact workflow. Compare total cost of ownership over 3–5 years, not just the sticker price.
When the software is a competitive differentiator, your workflow is unusual, you need deep integration with existing systems, or per-seat SaaS costs balloon at your scale.
When the problem is common and well-solved (email, accounting, generic CRM), you need it live quickly, and no part of it is a differentiator worth owning.
Yes. Lazlo builds custom software and operates its own products — many clients buy a product and have us extend or white-label it, getting speed and fit at once.
Not sure whether to build or buy?
Tell us the problem — we'll give you an honest recommendation, even if it's 'buy this and don't hire us.'
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