AWS Launches Lambda MicroVMs Combining Speed, Isolation, and State for Serverless

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AWS announced Lambda MicroVMs on June 22, 2026, a new serverless compute primitive designed to address longstanding limitations of traditional Lambda functions. Built on Firecracker, AWS's open-source virtualization technology already powering over 15 trillion Lambda invocations per month, each MicroVM gives users a fully isolated environment with its own kernel, memory, and disk. Unlike standard Lambda, which resets after every execution and has a 15-minute cap, MicroVMs preserve state — including installed packages and created files — for up to eight hours. When idle, a MicroVM is suspended to reduce costs, and resumes in fractions of a second using snapshot-based boot technology rather than a cold start. The feature targets use cases like AI coding assistants that require simultaneous speed, strong isolation between users, and persistent execution context.

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ProgrammingDEV Community ·

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ProgrammingDEV Community ·

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