Sooner or later, every founder with a vibe-coded app asks the same question: should we clean this up, or start over? The answers you will get are usually biased. Agencies love rebuilds — they bill more. Founders lean toward fixing — sunk cost is persuasive. Neither incentive has anything to do with your codebase.
When fixing wins
Fixing is the right call more often than the industry admits. The signals: the product works and users are happy; the problems are localized — exposed secrets, weak auth, no tests, no monitoring — rather than structural; and the stack is standard enough that any senior developer can work on it. Industry data puts cleanup at roughly 20–40% of the initial build cost, which is almost always cheaper than a rewrite.
When rebuilding wins
Rebuilding wins when the foundations are wrong, not when the paint is peeling. The signals: the data model does not match how the business actually works, and every feature fights it; changing one thing reliably breaks two others because there are no boundaries anywhere; or understanding the generated code costs more than writing it again. If your roadmap dies in that codebase, the cheapest path forward is out.
The three-question test
- Can a senior developer trace one complete user action — signup, payment, whatever matters most — through the code in under an hour?
- Would fixing the three worst problems touch less than a third of the codebase?
- Does the current data model survive the next twelve months of your roadmap?
Two or three yes: fix. Zero or one: rebuild — but keep the current app running while you do. It is not waste; it is the most precise product specification you will ever have, validated by real paying users.
Either way, the vibe coding already did its job
It proved people want your product before you spent engineering money on it. That was the expensive question, and it is answered. Our audits end with exactly this verdict — fix or rebuild, with a cost estimate for both. We price the audit the same regardless of the answer, which is what keeps it honest.
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