Custom ERP vs NetSuite: what each one actually costs.
The marketing material won't tell you the 5-year cost. We will. From a team that's built two production ERPs and seen plenty of NetSuite implementations from the engineering side.
The NetSuite quote you saw isn't the NetSuite cost you'll pay.
A NetSuite quote covers licenses and the initial implementation. It doesn’t cover the 6–12 months of consultant time to bend the system to your workflow. It doesn’t cover the perpetual license growth as your team grows. It doesn’t cover the lost productivity from a system your team quietly avoids.
Over 5 years, the actual cost is often 2–3x the initial quote — and you still have a system that isn’t quite right.
Custom ERP is the honest cost up front.
Custom ERP front-loads the cost: you pay for the build now and own the system. Maintenance is a fraction of the build cost. No per-seat license growth. No perpetual customization consultants.
The math works for businesses with non-standard workflows. For very standard workflows, NetSuite is genuinely the right call — we’ll tell you so.
Custom ERP vs NetSuite, side by side.
Numbers below are typical ranges, not absolutes. Your case may differ; we'll model it specifically in discovery.
It's the safe default. Nobody got fired for picking NetSuite. For mid-market companies with standard workflows, it's a reasonable choice — the configuration cost is high but the deploy risk is low. The case for custom ERP isn't 'NetSuite is bad' — it's 'your workflows are non-standard enough that fitting NetSuite costs more than custom over 5 years.'
Usually around year 2–3 for businesses with non-standard workflows. NetSuite costs front-load on customization consultants and back-load on perpetual license fees. Custom front-loads on build cost and back-loads on smaller maintenance retainers. Year 5 TCO is usually 40–60% cheaper for custom on the right kind of business.
They were 15 years ago. Today the risk profile is dramatically lower because the stack is mature: Next.js, Postgres, TypeScript, Stripe, QuickBooks API. We ship a working module in 4–8 weeks and iterate from there. The 'big bang' custom ERP horror stories you've heard are from the era of 18-month waterfall builds — not what we do.
Easier than outgrowing NetSuite. Standard frameworks mean you can hire engineers anywhere. You own the code — you're not negotiating with a vendor for a feature on their roadmap. Most clients who 'outgrow' their first version of a custom ERP just extend it; very few rip and replace.
Honest answer: businesses with very standard workflows in industries NetSuite was built for (manufacturing, distribution, retail), and businesses where the IT team is already trained on NetSuite and would have to be retrained for custom. NetSuite's cost is real, but so is the cost of switching.
We do a 1–2 week discovery: workflow mapping, data model design, integration inventory, ranked modules. Output is a written quote with fixed scope. Most custom ERP engagements land in the $45–150k range for the initial multi-module build, plus optional monthly retainer.
Want a real cost comparison for your business?
Tell us your team size, current systems, and workflow shape. We'll come back with a custom build estimate and a comparison to what NetSuite would likely cost — based on our experience, not vendor marketing.