The strongest open-source alternatives to E2B for building AI agents — agent runtimes ranked by GitHub traction, each with a head-to-head.
E2B (★ 13k) is Secure cloud sandboxes for running AI-generated code — the runtime layer for code-executing agents. If it is not the right fit, these 1 agent runtimes cover the same ground — Temporal is the most-starred option below. Or browse the best agent runtimes and E2B's own page.
Durable execution platform — write long-running, failure-resilient agent workflows as ordinary code. Best for durable agent workflows.
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