The Revenue Architect

The Revenue Architect

How to win a build vs buy decision

Don’t waste time trying to prove them wrong

Arnie Gullov-Singh's avatar
Arnie Gullov-Singh
Nov 05, 2026
∙ Paid

Thanks to the rise of coding agents more and more buyers have developed the conviction that they can build whatever you’re selling. Build vs buy decisions are becoming a way of life. This post covers how to stack the odds in your favor:

  • How to spot the signs of an internal build

  • Why trying to talk them out of it is the wrong approach

  • How to find out where the build stands

  • How to propose a solution that doesn’t read as a replacement

  • How to structure commercials to allay their fears

  • How to help them sell it internally

How to spot the signs of an internal build

Almost nobody says “we’re building this ourselves” in a sales call. They say other things, and the other things have a pattern:

  • Requests for decks and technical docs to circulate internally, with no next steps agreed

  • Repeated asks for features and customizations that increase the scope and push out the decision

  • The initial champion disappears, gets pulled into other projects, and is not replaced by a new champion

  • Evasive answers on success or acceptance criteria

  • Repeated asks for free technical input rather than commercial terms

Don’t try to talk them out of it

The standard founder response to a buy vs build is to sell why buying is good and building is bad: The software is designed for exactly this use case. You’re learning from a large customer base. You shouldn’t spend scarce engineering time on non-unique IP. You’re underestimating the cost of maintenance.

All true. All useless.

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