Build vs Buy Technology Advisory
A senior advisor runs your build vs buy call end to end. Real three-year cost numbers, a vendor and technical risk read, and one written memo with a name attached to the recommendation.
KORE1 staffs a senior technical advisor, contract or fractional, who runs your build vs buy decision end to end, real three-year cost modeling, a vendor and technical risk read, and one written recommendation memo with a name attached to it.
A subsidiary lending arm we work with ran our free decision tool in April. The reading came back 61, buy the foundation, build the layer on top. Clean number. Nobody moved on it for six weeks, because a 61 on a website quiz doesn’t survive a room where the CFO wants the vendor’s total cost audited and the VP of Engineering wants to know who actually owns the integration risk. The tool told them what to think. It couldn’t make the case to the room.
That’s the gap this page covers. We place that same five-number math onto a person instead of a browser tab. A senior engineering leader spends two to four weeks embedded with your team. They pull your real vendor quotes, not the marketing numbers, and interview the people who’ll actually own the outcome. Then they hand back one memo, a recommendation, with a name attached to it. We staff this through our engineering staffing practice, on contract, fractional, or folded into a search you’ve already got open.
The framework underneath belongs to Kris Drouet, who has spent 25 years building and leading engineering teams in fintech and mortgage tech, most of it under an auditor’s eye. He wrote the long version of it in Show Me the Data, his build vs buy framework for engineering leaders. This page is the staffed version. You don’t read the framework. You get someone who runs it.
A Number on a Screen Doesn’t Survive a Room With a CFO In It
Run our free build vs buy decision tool and you get a needle, a spread, and an honest verdict in about ninety seconds. Genuinely good. We built it and we stand behind the math. What it can’t do is sit across from your CFO and defend the three-year cost model when she asks why the vendor’s implementation fee wasn’t in the number, or explain to a skeptical staff engineer why buy doesn’t mean his team is being replaced.
Five inputs from one person in a browser tab is a gut check, useful on a Tuesday afternoon when nobody’s asked for a budget yet and the whole team already privately agrees on the answer. A real build vs buy call, the kind with a budget line and a headcount request attached, usually has four or five people who each believe a different number is the real one. The CFO trusts total cost of ownership. The staff engineer trusts the architecture diagram. The product lead trusts the launch date. Nobody trusts each other’s spreadsheet, and that’s not a math problem. It’s a room problem.
A staffed advisor spends time in that room. Interviews the four people, pulls the real vendor quote instead of the marketing number, prices the loaded headcount a build actually requires, and writes it all down where everyone can see the same page at the same time. That last part is the whole job, honestly. Decisions made in a hallway rarely survive a board meeting. Decisions written down usually do.
One Page. A Recommendation. A Name Attached to It.
This is roughly what lands in your inbox at the end of the engagement, format lightly adapted from a real one. Four sections, five numbers, one line nobody can hide behind.
| The number | Build | Buy |
|---|---|---|
| Three-year cost | $612,000 | $284,000 |
| Time to value | 7 months | 3 weeks |
| Owns it at 2am | 1 senior eng, no backup | Vendor SLA |
Recommendation. Buy the core, build the reconciliation layer your compliance team actually needs. The vendor’s uptime record covers the plumbing. Nobody sells the audit trail your last exam flagged, and that’s the six weeks of engineering worth spending.
Reviewed with: VP of Engineering, CFO, Staff Engineering (3) · Sign-off:
Every engagement ends here. Not a slide deck nobody rereads. One document, with the arithmetic showing its work, that a skeptical exec can pick up eight months later, after the budget’s spent and the people who argued about it have scattered onto three different projects, and still trust.
Ask What They Recommended When the Room Wanted the Other Answer
Anyone can run a cost model. What we screen for is harder to fake. We ask every advisor candidate to walk us through a build vs buy call where their own recommendation was the unpopular one in the room, and to tell us what happened after they made it anyway.
The candidates worth staffing can name the meeting, the number that changed someone’s mind, what they got wrong the first time they ran the math, and who in the room they had to win over before anyone signed off. The ones who can’t just describe a framework instead, which is a tell every senior engineering leader in the room recognizes immediately.
“Show me the data. That’s the whole job. A recommendation without the arithmetic underneath it is just an opinion with a deadline attached.”
We also test whether a candidate can hold two things at once, respect for the engineer who wants to build it and enough discipline to price the maintenance bill honestly anyway. Kris has run this exact fight from the inside, and not every time did the room agree with him going in. On a Kafka pub/sub migration he led, the decoupled build was the right call, and it cut downstream processing latency by 45 percent. The team that made it work stayed intact for three years afterward, because somebody counted the maintenance cost before signing off, not after.
What KORE1 Brings to the Engagement
Time-to-hire and retention are KORE1’s own placement figures, trailing twelve months. Kris Drouet’s tenure and case data are his own, and he’s a real person with a bio on this site.
Three Tracks, Same Advisor Bench
Most engagements start as the first track. A few need the third.
Standalone Advisory Sprint
Two to four weeks, one decision, one memo. Priced and scoped like a project, not an open-ended retainer.
Project Staffing →Folded Into a Fractional Engagement
Already running a fractional VP of Engineering? The same build vs buy discipline folds into their existing scope, no second search.
Fractional & Interim VP Eng →The Advisor Who Stays to Build
If the memo says build, the same person can convert to lead it, direct hire or extended contract, so the recommendation and the execution share one brain.
Direct Hire Staffing →
When This Isn’t the Right Desk
Three situations where we’ll point you somewhere else on the first call, not the third.
If the decision is specifically about an ERP platform, NetSuite, SAP, Dynamics, our ERP vendor selection and RFP advisory desk runs a deeper version of this built around that exact evaluation, license tiers included. If what’s actually missing is an engineering leader in the seat full time, not a bounded decision, start at VP of engineering staffing or, in a regulated shop, fractional VP of engineering for regulated industries.
And if the build vs buy question is specifically about an AI pilot, that’s a related but different fight, covered in Kris’s build vs buy in AI and in the AI readiness scorecard. If your team can already ship and the real question is whether they’re fast enough, the engineering velocity assessment answers that one instead. And when the real question is the shape of the whole organization rather than one decision or one number, an engineering org design consultant redraws the structure and the operating cadence instead.
Kris Drouet on Why the Memo Beats the Meeting
Kris is VP of Engineering at a mortgage technology company and a contributor here. Twenty-five years building and leading teams, nearly all of it in fintech and mortgage tech, where a bad build vs buy call eventually shows up in an audit rather than just a retro.
His stance on this hasn’t moved in years. Show me the data. Not a vibe, not a demo that ran clean for ninety seconds, the actual three-year number with the maintenance bill included. He’s watched good engineers lose a build vs buy argument they should have won because they showed up with an architecture diagram instead of a cost model, and he’s watched teams sink a year into a build a five-minute conversation would have talked them out of.
One number he brings up often. An Encompass integration in mortgage tech gets quoted by vendors like a long weekend, plug it in, map a few fields, ship it. The honest number, once field mapping and compliance review are counted, runs closer to two quarters. That gap between the quote and the real number is exactly what a written memo exists to close, before the budget gets committed instead of after.
Common Questions
What does a build vs buy technology advisor actually do?
A build vs buy technology advisor runs a structured two to four week evaluation, real three-year cost modeling, stakeholder interviews, a vendor and technical risk read, and delivers one written recommendation memo with a name attached to it.
That last part matters more than people expect. A recommendation nobody signed is a suggestion. A recommendation with a name on it is a decision, and that’s the difference between a memo that changes a budget meeting and one that gets forgotten in a shared drive.
How is this different from the free build vs buy decision tool?
The free tool is five inputs from one person in a browser, an honest gut check in about ninety seconds. This is a staffed engagement where an advisor interviews your actual stakeholders, prices your actual vendor quotes, and writes a memo built to survive a room where people disagree.
Run the tool first if you’re early in the decision. Call us when there’s a real budget line attached and more than one person who’s already sure they know the answer.
How long does an advisory engagement take?
Two to four weeks for a standalone decision, longer if it’s folded into an existing fractional engagement.
Week one is interviews and vendor quotes. Week two or three is the cost model and the risk read. The last few days are the memo itself, plus a walkthrough with whoever has to defend the call afterward.
What does a build vs buy advisory engagement cost?
Standalone sprints typically run in the low five figures for a single decision, priced as a scoped project rather than an open-ended hourly retainer.
Scope drives the number more than anything else does, since a single-vendor evaluation costs a lot less than a build vs buy call that touches three systems, two departments that don’t fully trust each other, and a compliance review nobody scoped in at the start. We quote after the first call, not before it.
Can the same advisor stay on to lead the build if that’s the recommendation?
Usually, yes. If the memo recommends build, the advisor can convert to a direct hire or an extended contract and lead the work they just scoped, so the recommendation and the execution aren’t handed between two different people.
That handoff is where a lot of build decisions quietly die anyway, because a consultant recommends it, collects the check, and leaves, and whoever inherits the plan six months later has to relearn everything the original interviews already surfaced.
Do we need this if we already have an engineering leader?
Often, yes, because the value is an outside read your own VP of Engineering can’t fully give you.
Nobody who has to live with the decision can completely separate the recommendation from their own preference, and that’s not a knock on them, it’s just how ownership works, the same way nobody expects a candidate to interview themselves fairly for their own promotion. A build vs buy call from someone without a stake in which way it lands tends to hold up better in a board meeting.
What’s the biggest reason a build vs buy decision goes wrong even after a good analysis?
The maintenance number gets guessed instead of priced.
Teams will spend a week arguing over the build estimate and five minutes on who owns the system at 2 a.m. eighteen months from now. That’s backwards, and it’s the single most common gap our advisors find once they sit down with the real numbers.
Tell Us Which Decision You’re Sitting On
One call is usually enough to scope whether this is a two-week sprint or a fractional engagement, and what the memo needs in it to survive the specific room it’s headed into.
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