Vibe coding is hollowing out the martech stack fast

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.

Point solutions are under pressure

The shift is most visible at the edges of the stack, where point solutions once filled gaps but are now easier to recreate internally at low cost.

“The stack is stratifying into layers with different competitive physics,” Scott Brinker wrote in his blog last week. “AI-native tools are largely winning creation. Copy ideation, pitch decks, visual production, competitive intelligence. Tasks where the primary input is a prompt and some brand context, and where model quality is the product.”

Established SaaS platforms like HubSpot and Salesforce still control the orchestration layer, according to Brinker. They handle coordinated functions like lead scoring, routing, pipeline management, channel execution, and offer personalization, where data connects directly to action within systems such as CRMs, marketing automation platforms, and ecommerce tools.

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Hazards in the martech industry

“And that obviously creates hazards, particularly for the martech industry, because you already have what, a gazillion martech vendors?” said Penn. “Well, now you have a gazillion martech vendors and a whole bunch of people saying, ‘Well, I can do that too, and I don’t need to pay whatever,’” he said.

That dynamic is turning replacement into elimination, as some categories disappear from stacks entirely rather than being swapped for alternatives.

In some cases, the shift is dramatic enough to reshape entire stacks. Penn points to one agency that replaced most of its software footprint with internally built tools.

Replacement is giving way to removal

“I was talking to someone this morning, they work in a marketing agency, and their agency has replaced 80% of their software subscriptions. Out the window, they just vibe-coded their own,” he said. “They’ve saved a lot of money, and those SaaS companies are now kind of out of luck.”

The broader adoption data supports that trend, with 92% of U.S. developers using AI coding tools daily, according to Hashnode’s “The State of Vibe Coding in 2026,” and 41% of all code now AI-generated globally, based on the 13Labs’ “Vibe Coding Report 2026.”

That combination of capability and adoption is accelerating how fast teams can replace or remove tools.

As more teams build their own tools, feature-based differentiation is becoming harder to sustain across vendors. Products that once felt distinct are increasingly interchangeable in the eyes of buyers.

Differentiation is collapsing

Penn highlights how quickly software can now be replicated. “There is nothing that this new company offers that you couldn’t replicate in literally a day… You already have a huge amount of software now that is virtually identical.”

This creates a new decision point for marketers: choose between similar vendors or build their own solution.

Not every part of the stack is equally exposed to this shift, particularly systems of record like CRM. These platforms remain more stable due to switching costs tied to data, training, and operations.

Penn explains the constraint in practical terms.

“Their core CRM has like 15 years of data in there, and moving that data is a pain… and retraining the humans that use it… There would still be differences in the operation.”

Enterprise systems hold, for now

This creates a split market where core systems remain sticky while peripheral tools become easier to replace or remove.

As software itself becomes easier to replicate, the source of value shifts away from features and into areas harder to duplicate.

“There’s no such thing as making it defensible if you’re trying to defend software. Software is indefensible now,” Penn said.

Instead, differentiation comes from what surrounds the product. “Where you will make a meaningful difference is in the value chain,” he said. “Your customer support, your service, your maintenance, what’s the value add on top of the product that is harder to replicate?”

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A different kind of martech evolution

The broader shift is toward building instead of buying, especially for workflows that can be recreated quickly and cheaply. This aligns with the rapid growth of vibe coding platforms, which have reached an $18 billion market, according to IdeaPlan’s “2026 SaaS Market Trends.”

For marketers, this creates more flexibility and cost control, while also introducing new responsibilities around maintenance and governance. For vendors, it raises the bar for staying relevant in a stack that is becoming more customizable.

The result is a martech landscape where fewer tools are purchased, more are built and the real competition moves beyond software itself.