Make Smart Build vs Buy Decisions for Data Capabilities

We paid for four months of an investor data subscription before anyone on the team opened it twice. Working out which investors actually fit a founder's stage and cheque size is our end of the business, so the raw list was never the hard part. Building your own version looks cheap because the scraping is easy. Maintaining it is where the money goes.

The rule now is what a wrong row costs us. If a stale record wastes an hour, build it and live with the mess. If a mis-tagged cheque size sends a founder into a call with a fund that never writes under $5M, pay someone else to keep the data clean. The old subscription renews in November, with a reminder sitting in the calendar to cancel it.

One of the most useful frameworks is a weighted scorecard with 7 criteria, with very strict budgeting and timing constraints. You weight strategic differentiation 25%, then internal engineering capability, integration density, and regulator requirements each 15%, along with a few other things.

You score 1-5 on each, and then you quickly get an unemotional decision on whether to build, buy, or hybrid. The biggest mistake is that people treat this as a binary decision when in fact buy-and-extend is often the right answer.

That is, you buy an existing platform that meets 80% of your needs, and then you customize and extend the remaining 20% with APIs, low-code, or otherwise. Cost modeling can be very eye-opening. I remember a major InsurTech company figuring that it would cost $450k/year in hard dollars to build and maintain their own data observability solution, taking 30% of their engineering staff. This kind of opportunity cost often pushes you to buy.

The regrettable bet is almost never picking build when you should've bought, or the reverse; it's committing to either one before actually testing what the data problem requires. Under time pressure, teams skip that test because it feels like it costs time they don't have.

The rule that's saved us: before committing budget either direction, spend a small, fixed amount of time building the narrowest possible version of the capability ourselves, just enough to see what the data actually looks like in practice. On the AI-powered LMS work, that early test surfaced how inconsistent the input data was across platforms before we'd locked into an approach, information an external tool's sales page never would have told us upfront.

That small build isn't the real solution; it's reconnaissance. It tells you which questions to ask a vendor, or whether building it yourself is actually harder than it looked from the outside. Skipping that step to save a week is usually what creates the bet you regret months later.

I make the call by asking who owns the rules when the system is wrong. If the workflow is commodity, I buy and use a managed service. If the rules are specific to how our team proves the work later, I build or at least keep the controlling layer where we can change it.

Under pressure, this prevents two expensive mistakes: rebuilding infrastructure that a cloud provider already operates better, and buying a black box for a process we have to audit. Our default DevOps approach is cloud-native managed services when they solve a defined business need, partly because certified managed services shorten audit preparation for areas such as SOC 2 or HIPAA. That's a clear buy decision.

The opposite applies when the data capability carries our operating standard. Our internal data integration platform runs in our own Kubernetes cluster from a Helm chart we maintain, with atomic upgrades so a failed release rolls back as a whole. That gives us behavior we can review and roll back. For a delivery or quality process, those traits matter more than a vendor feature list.

Buy the commodity engine and own the decision logic. If replacing the tool tomorrow would only change cost, speed, or UI, buy it. If replacing it would change how your company proves what happened, who approved it, or why a metric means what it means, own it.

I ask one question first: is this something users will directly experience, or is it infrastructure that already exists elsewhere in better form?

At Nika Finance, we route perpetuals to Hyperliquid through builder codes rather than building our own matching engine. We route prediction markets to Polymarket rather than building an oracle stack. What we build in-house is the interface, the wallet layer, the cross-chain plumbing, and NikaAI. Everything else routes to partners who already ship that capability at world-class quality.

The decision framework is straightforward. If users touch it directly (the interface, the authentication flow, the way they express intent), you build it. If it is infrastructure that determines whether your product works but users never interact with it directly (matching engines, oracle resolution, liquidity provisioning), you route to the team that already does it best. Building infrastructure in-house when a specialized partner already ships a superior version wastes time you could spend on the surface users actually see.

The regret we avoided was not wasting six months building a worse version of something Hyperliquid already ships. We integrated through builder codes in two weeks. Our users get best-in-class perpetuals execution from day one, and we spent the saved engineering time on the mobile interface and the AI layer, which no one else was building for us. The three of us ship five product lines because we only build what routes to us, not what routes through us.

This approach also forces honesty about what you are actually good at. Most teams overbuild because they conflate control with quality. The orchestrator model only works if you are willing to admit that someone else ships better infrastructure than you could, and your actual advantage is in the consumer-facing layer where users make decisions.