The Great Martech Shift: Why SaaS is Becoming Infrastructure and AI is Taking the Reins

The world of marketing technology is hitting a massive turning point. If you’ve been following the industry for any length of time, you know the names Scott Brinker and Frans Riemersma. For years, they’ve tracked the explosive growth of the martech landscape, but their latest study suggests we’ve reached a stage they call "Peak Martech." It’s not just that the number of tools is still growing—it’s that the very nature of how we use them is fundamentally breaking and reforming in ways that will change marketing forever.

The Flattening of the Stack

For the past decade, the marketing stack was built like a skyscraper. You had your CRM at the base, your email tools on top, and dozens of specialized apps stacked on top of those. Each tool had its own database and its own way of doing things. But Brinker and Riemersma point out that this model is collapsing. We are moving toward a "flattened" stack. Instead of data being trapped in individual software-as-a-service (SaaS) silos, it is being consolidated into centralized data warehouses like Snowflake, BigQuery, or Databricks. In this new world, the specific SaaS app you use matters less than the data it feeds into the central hub.

SaaS Devolves into Infrastructure

One of the most provocative claims in the study is that SaaS is "devolving" into infrastructure. In the early days, a SaaS product was a destination—a place where marketers went to do work. Today, software is becoming the plumbing. We are seeing the rise of "composable" martech, where companies pick and choose specific functions from different providers rather than buying one giant, rigid suite. Because these tools now plug directly into the company’s own data cloud, the software itself acts more like a utility than a standalone platform. It’s a shift from "buying a solution" to "building an ecosystem."

The Rise of the AI Agent

Perhaps the most disruptive change highlighted is the rise of AI agents. We aren't just talking about chatbots that help you write copy. We are entering an era of "agentic AI"—systems that can make autonomous decisions about where to spend budget, which customers to target, and how to optimize a campaign in real-time. Brinker and Riemersma argue that decision-making is moving away from human marketers and into the hands of these algorithms. While this brings unprecedented efficiency, it also introduces a massive challenge for brands: the loss of direct control.

Why Brand Control is Leaking Away

As AI takes over decisioning and stacks become more automated, brand control is starting to leak away. When a brand’s presence is determined by an AI agent interacting with another AI agent (like a consumer’s personal AI assistant), the traditional touchpoints of marketing—the visual identity, the tone of voice, the emotional connection—become harder to maintain. If an AI decides which product to show a user based purely on data points, the "magic" of brand storytelling can get lost in the machine. Marketers are facing a paradox: they have more tools than ever, but less direct influence over the final customer experience.

Navigating the New Frontier

The message from the latest study is clear: the old playbook is dead. To survive in the era of Peak Martech, companies must stop focusing on collecting more tools and start focusing on data orchestration and AI governance. The winners won't be those with the biggest stack, but those who can maintain their brand's soul while operating in a world where the infrastructure is invisible and the agents are in charge.