AWS has launched Lambda MicroVMs, a new serverless compute primitive that provides VM-level isolated execution environments powered by Firecracker. Unlike traditional VMs (slow to start), containers (shared kernel risks), or standard Lambda functions (stateless), MicroVMs offer near-instant launch via pre-initialized snapshots, stateful execution retaining memory and disk across sessions, and full lifecycle control including auto-suspend and resume. Each MicroVM gets dedicated resources with no shared kernel between users, making it suitable for running untrusted user- or AI-generated code. MicroVMs support up to 8 hours of runtime, up to 16 vCPUs, 32 GB memory, and 32 GB disk. They are built using a Dockerfile-based image workflow, launched via API or console, and accessible through a dedicated HTTPS endpoint. Available now in select AWS regions on ARM64 architecture.
