Runta
The execution layer that 'parents' AI agents.
Runta builds an agent execution layer with sandboxes, spending caps and audit trails — a 'parenting' layer for agents that directly addresses the containment failures exposed by prompt-injection incidents. a16z called it 'core systems software rebuilt for agents'; $20M seed at a $100M+ valuation (Jul 2026).
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E2B
Open-source sandboxes for running AI-generated code.
E2B gives agents secure, isolated cloud micro-VMs to execute code and commands — the execution runtime layer of the harness, used by many coding and data-analysis agents.
Daytona
Elastic sandboxes for running AI-generated code.
Daytona provides secure, OCI-compatible sandbox 'computers' that spin up in under 90ms — with snapshots for persistent agent state. In 2026 it moved core development to a private codebase while continuing to run as a commercial platform.
OpenHands
The open platform for cloud coding agents.
OpenHands (formerly All Hands AI, born from the OpenDevin project) builds the major open-source coding-agent platform — agent canvas, sandboxed execution, SDK and an enterprise control plane — now rebranded under the project's name.