E2B is an Apache-2.0 open-source project for running AI-generated code in isolated cloud sandboxes. This source-and-docs review covers the August 2026 releases, self-hosting limits, and what to verify before production.
Microsandbox is an Apache-2.0 Rust microVM runtime and library for untrusted workloads. As of v0.6.10 it is still beta, so teams should pin releases and validate KVM/WHP hosts before production.