While the AI community debates whether agents are overhyped, a quieter story is unfolding in enterprise infrastructure. E2B, a company providing sandboxed cloud environments for AI agents, just raised $21 million in Series A funding led by Insight Partners. More telling than the funding amount is this statistic: 88% of Fortune 100 companies are already using E2B’s platform.

This isn’t another AI agent demo or research breakthrough. It’s evidence that the real challenge in agent deployment has shifted from “can agents work?” to “how do we safely run them at scale?”