compare
reviewed
microsandbox runs directly on a Mac, Linux machine, or Windows PC, without a service stack. E2B offers managed cloud sandboxes, hosted memory snapshots, and enterprise BYOC. both publish Apache-2.0 runtimes. [1][2][3][26]
both use microVMs with separate guest kernels. E2B uses Firecracker; microsandbox uses libkrun and packages the runtime as an embeddable SDK. [1][24]
E2B is no longer cloud-only: its Embed package runs the stack on a Linux/KVM machine for evaluation. microsandbox supports local execution across three host platforms, plus its private-beta cloud through the same SDKs. [1][20][26]
01
E2B now supports reusable disk-and-memory snapshots, not just pause and resume. capture briefly pauses the source, then lets it continue; a snapshot can start multiple children. [3] microsandbox offers that workflow locally, including copy-on-write memory restores. its cloud snapshots currently save disk state only. [21]
02
E2B Embed is useful for evaluating real Firecracker sandboxes on one Linux/KVM host. E2B explicitly describes it as an evaluation package, not a production deployment pattern. [1] microsandbox embeds directly and can run offline once images and dependencies are provisioned. [23][26]
for managed cloud, compare total usage and plan charges. E2B’s Hobby plan has no base subscription, but compute is metered. microsandbox’s free local runtime and paid cloud are also separate offerings. [5][27]
common questions
yes. E2B publishes its runtime under Apache-2.0. microsandbox uses the same license; the difference is deployment and integration, not open source versus closed source. [1][26]
yes, through Embed on a Linux host with KVM. it runs a service stack and is documented for evaluation. microsandbox runs locally on macOS, Linux, and Windows without that stack. [1][26]
yes. a snapshot can preserve filesystem and memory, keep the source running after capture, and create multiple new sandboxes. [3] microsandbox supports full checkpoints locally; its cloud snapshots are disk-only. [21]
primary sources
put the boundary on your own machine before you choose anything else.
run it locally