What just happened

On June 22, 2026, AWS quietly launched Lambda MicroVMs. Not a Lambda feature update. A new compute primitive sitting between Lambda Functions (stateless, 15-min max) and EC2 (full VM, you manage everything).

Each MicroVM is an isolated Firecracker VM with its own HTTPS endpoint, running your code from a pre-built snapshot. Stateful. Up to 8 hours. Suspend when idle, resume on demand.

I tested it the same week. Here's what I found.

The test setup