Layers of AI | Agent Native to Infrastructure

AI layer

Infrastructure

Observability, sandboxes, and agent runtime plumbing

What lives here

The plumbing agents depend on: sandboxes, browser runtimes, LLM observability, tracing, evals, security, and model APIs. Small businesses rarely buy these directly, but every agent stack needs something here.

Two dimensions

Every tool gets a category (what job it helps with, 16 options like Productivity or Automation) and a layer (where it sits in the AI stack, one of five). They are independent. E2B is Automation + Infrastructure. Braintrust is Productivity + Infrastructure.

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What lives here

Two dimensions

Next step

21 tools