The Bubble Under the Bubble

Stacking Trades — Tue, 18 Nov 2025 21:24:29 +0000

A Layer Most People Never See

The public AI boom is straightforward to see. New models keep coming out, GPU clusters grow, and companies hurry to get on board with this trend. This story fills conference stages and quarterly earnings calls. It’s clear and loud. It feels like the heart of the industry.

Beneath that surface is a quieter layer. It is not made of models or infrastructure. It consists of tools designed for other AI companies. These include logging platforms, evaluation dashboards, routing engines, data labeling systems, prompt management tools, monitoring layers, and vector databases. There are entire companies created to sell technology to businesses that are still trying to find their product market fit.

This is the bubble under the bubble.

When Tools Outnumber Use Cases

The dynamic became clear in 2024. The Stanford AI Index reported a growing gap between experimentation and deployment. Many companies conducted pilots, but few moved generative AI systems into production environments. Gartner supported this in its 2024 surveys, observing that a significant portion of generative AI projects stayed at the proof of concept stage.

Despite this, developer tools for AI continued to multiply. Companies selling observability layers, orchestration frameworks, and evaluation platforms grew quickly because their users were not traditional enterprises. Their users were other AI startups.

It created a peculiar market. Revenue moved in circles. Capital flowed into companies selling tools to companies funded to build products that had not yet found durable demand. Everyone was supplying everyone else, but the end user was often missing.

A Feedback Loop Built on Optimism

There is no deception here. The loop forms naturally when innovation runs ahead of adoption. A startup needs a vector database, so it signs up for one. It needs prompt evaluation, so it subscribes to that too. It needs monitoring across model versions, so it adds another tool. Each vendor then uses those early numbers to raise more capital or forecast more demand.

The result is a stack of tools built for workloads that exist mostly in anticipation. A layer of infrastructure validated by pilot projects rather than scaled production use. A market shaped by enthusiasm and technical possibility rather than real customer pull.

Cloud hyperscalers add to the effect. GPU capacity continues to expand even though utilization, by their own reporting, remains uneven. Startups borrow compute through credits, which helps them build products, which creates apparent demand for more tools, which encourages more startups to enter the space.

It is momentum that reinforces itself until it doesn’t.

“The AI boom everyone talks about sits on top of a quieter one. The toolmakers are growing faster than the customers they hope will follow.”

The First Signs of Strain

You can already see small fractures. Some developer tool companies report increased signups without turning those into paid conversions. Others notice growing interest but stagnant long-term retention. Investors talk about adoption patterns that resemble experiments rather than solid commitments. None of this indicates a collapse. It indicates an imbalance.

The bubble under the bubble is not in the visible AI arms race. It sits underneath, in the scaffolding that supports companies still trying to discover real users. It is the infrastructure built ahead of demand. It is the tooling layer that grows faster than the applications it is meant to support.

A Cycle as Old as Technology

Every major technology wave produces this moment. Tools mature faster than the market they serve. Businesses chase readiness long before the workloads justify the architecture. Some of those tools eventually become foundational. Others fade as the market corrects its course.