AWS Lambda

license

Proprietary

service

proprietary AWS-only SaaS (no self-host)

underlying-microVM

Firecracker is Apache-2.0 OSS but the Lambda control/data plane is closed

weights

n/a

source

closed

Lambda is a proprietary managed serverless service, and the closed counterpart to the open runtimes in this category. Firecracker, the microVM substrate underneath it, is separately open source but is a different product; Lambda itself is not self-hostable.

• https://aws.amazon.com/blogs/aws/firecracker-lightweight-virtualization-for-serverless-computing/ recorded 2026-06-04

  Firecracker microVM powers Lambda; Lambda is AWS-managed proprietary service

• https://aws.amazon.com/lambda/faqs/ recorded 2026-08-13

  Lambda is sold only as an AWS-run service. Deployment is "package and deploy functions as .zip file archives that you can upload directly through the console, CLI, or SDKs, or as container images", with no self-hosted distribution and no published source for the service; the page carries no license other than AWS terms. The MicroVMs section states Lambda MicroVMs are "built on the same Firecracker virtualization powering 15 trillion+ monthly Lambda Function invocations", which is the open substrate under a closed service rather than an open Lambda.

AWS states that Lambda "processes trillions of executions for hundreds of thousands of active customers every month" - a mass-market serverless deployment substrate, unambiguously past the >10M reach floor. The adoption is attributed to general serverless usage rather than specifically to agent code execution. AWS’s current Lambda FAQ raises that figure, stating "15 trillion+ monthly Lambda Function invocations" against the launch post’s "trillions". One caveat travels with the level: Lambda has no countable artifact - no package, repo or registry entry - and the invocation figure is a vendor-reported platform total rather than a per-user count, so the band rests on vendor disclosure rather than on a measurable channel.

• https://aws.amazon.com/blogs/aws/firecracker-lightweight-virtualization-for-serverless-computing/ recorded 2026-06-04

  trillions of executions / hundreds of thousands of active customers monthly

• https://aws.amazon.com/lambda/faqs/ recorded 2026-08-13

  "Built on the same Firecracker virtualization powering 15 trillion+ monthly Lambda Function invocations". AWS publishes no customer or developer count on this page.

Frontier-definer for this category: microVM-grade isolation, the widest runtime breadth, and the largest proven scale of any deployment runtime here. Scored 5. Runtime breadth is the widest here - Java, Go, PowerShell, Node.js, C#, Python and Ruby natively plus a Runtime API for any other language, and both .zip archives and container images - and isolation is per-function and Firecracker-backed. AWS has since shipped Lambda MicroVMs, a primitive explicitly "purpose-built for workloads that execute user- or AI-generated code" with VM-level isolation, near-instant launch and resume, and state persistence up to 8 hours, which puts Lambda directly on the agent-sandbox feature axis this category scores rather than only adjacent to it; MicroVM containers reach 32GB of memory and 16 vCPUs on Amazon Linux 2023, and functions scale at up to 1000 concurrent executions every 10 seconds on top of 15 trillion monthly invocations.

• https://aws.amazon.com/blogs/aws/firecracker-lightweight-virtualization-for-serverless-computing/ recorded 2026-06-04

  Firecracker microVM isolation, ~125ms start, ~5MiB/VM, trillions of executions

• https://aws.amazon.com/lambda/faqs/ recorded 2026-08-14

  "AWS Lambda natively supports Java, Go, PowerShell, Node.js, C#, Python, and Ruby code, and provides a Runtime API which allows you to use any additional programming languages"; functions deploy "as .zip file archives ... or as container images. Both methods provide the same execution environment"; "Each AWS Lambda function runs in its own isolated environment"; functions scale "at a rate of up to 1000 concurrent executions every 10 seconds". Lambda MicroVMs "combines VM-level isolation, near-instant launch and resume, and state persistence across interactions ... purpose-built for workloads that execute user- or AI-generated code", built on "the same Firecracker virtualization powering 15 trillion+ monthly Lambda Function invocations", persisting state up to 8 hours with containers up to 32 GB memory and 16 vCPUs on Amazon Linux 2023.