Every ecommerce team eventually faces the same question. A tool does most of what you need but not quite all of it. A developer says they could build exactly the right thing. The purchase price is visible and the build cost looks smaller, so custom wins the argument, until the maintenance bill arrives.
A build vs buy assessment puts both options on the same footing. We cost the full life of each choice, not just the first release, and look at what it means for your team to own it.
What we weigh
- Total cost of ownership. Licence fees against development, hosting, security updates, monitoring and the people needed to keep it running.
- Differentiation. Whether the capability sets you apart from competitors or is a commodity that every store needs.
- Fit and gaps. How close each product gets to your requirements and what the remaining gap would cost to close.
- Vendor risk. Roadmap direction, pricing changes, data access and how hard it would be to leave.
- Time to value. How soon each option would be live and useful, and what waiting costs the business.
A third option
The choice is rarely binary. Often the best answer is to buy a solid product and extend it through its API, or to build a thin custom layer on top of a platform rather than replacing it. We include these middle options because they are frequently the cheapest to run.
How it runs
We list the capabilities in question, gather requirements from the people who will use them and shortlist the products worth considering. Where a build is on the table, we sketch the architecture and estimate it with the same rigour we would use on a real project. Both sides are then compared using the same assumptions about volume, growth and staffing.
The result is a decision document for each capability, with the reasoning written so that someone joining the team in two years can see why the call was made.
This assessment is part of our ecommerce strategy and roadmapping service. It often runs alongside platform selection or ahead of composable commerce development, where the build vs buy question comes up for every service in the stack.
