The impact of vibe coding on martech is already showing up in vendor churn and changing buying behavior. Mid-market firms have seen a 35% year-over-year decline in renewals for single-function martech tools, according to Chiefmartec & MartechTribe’s “ Martech for 2026 Report .” Chris Penn, co-founder and chief data officer at TrustInsights.ai, says the issue runs deeper than cost or efficiency. “The bigger challenge, at a macro level, that vibe coding poses is not just the operational stuff of ‘is your code any good?’ because a lot of it isn’t. A lot of human code isn’t either, which is fine. But the challenge is a few things. One, it makes software a complete commodity,” he said. That commoditization is already changing who builds software. About 63% of Vibe Coding users are non-developers, according to Superframeworks’ “ Vibe Coding Tipping Point 2026 ” report, meaning marketers themselves are increasingly creating the tools they used to buy.…