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OpenSandbox

OpenSandbox — the protocol-driven open-source sandbox platform for AI agents, started by Alibaba and now governed under its own opensandbox-group GitHub org. Multi-language SDKs (Go SDK now GA), Docker/Kubernetes runtimes, persistent storage shipped. 11.4k stars, Apache-2.0.

https://open-sandbox.ai ↗
ai-agentssandboxopen-sourcepythongithubdockerkubernetes

Key takeaways

  • General-purpose sandbox platform for AI applications — multi-language SDKs (Python, Java/Kotlin, TypeScript, C#, Go — all shipped), unified sandbox APIs, Docker/Kubernetes runtimes
  • Persistent storage shipped: PVC auto-provisioning, Docker named volumes, OSSFS, and Kubernetes PVC support landed by mid-2026, plus pause/resume with rootfs snapshots — closing the biggest gap critics flagged at launch
  • Protocol-driven design: sandbox lifecycle management and execution APIs let you extend custom sandbox runtimes. Strong isolation via gVisor, Kata Containers, and Firecracker microVM
  • 11.4k stars, Apache-2.0. Moved from the alibaba GitHub org to a dedicated opensandbox-group org and is listed in the CNCF Landscape — the enterprise-grade open-source alternative to E2B and Daytona

FAQ

What is OpenSandbox?

An open-source sandbox platform for AI applications, started by Alibaba and now developed under the opensandbox-group GitHub org. Provides multi-language SDKs, unified APIs, and Docker/Kubernetes runtimes for coding agents, GUI agents, AI code execution, and RL training.

How does it compare to E2B?

E2B is a hosted service with a simpler developer experience and per-second billing. OpenSandbox is self-hosted, protocol-driven, and Kubernetes-native — better for enterprise teams that need custom runtimes, strong isolation, and full control without usage fees.

Does OpenSandbox support persistent storage?

Yes. Persistent storage shipped in the first half of 2026 — PVC auto-provisioning fields in the SDKs, Docker named volumes, OSSFS, and Kubernetes PVC examples, plus pause/resume with rootfs snapshots and a public snapshots API on the Kubernetes runtime.

Overview

OpenSandbox is a general-purpose, open-source sandbox platform for AI applications, started by Alibaba and — as of June 2026 — developed under its own dedicated opensandbox-group GitHub organization (the old alibaba/OpenSandbox URL redirects). It provides multi-language SDKs (Python, Java/Kotlin, TypeScript, C#/.NET, Go), unified sandbox APIs, and Docker/Kubernetes runtimes for coding agents, GUI agents, agent evaluation, AI code execution, and RL training.

The protocol-driven design defines sandbox lifecycle management and execution APIs, enabling custom sandbox runtime extensions. Strong isolation is supported via gVisor, Kata Containers, and Firecracker microVM. The project is now listed in the CNCF Landscape.

Key stats (as of June 11, 2026): 11,461 stars, 939 forks, Apache-2.0. Created December 2025; actively maintained with multiple releases per week across SDKs and components.

Key Features

  • Multi-language SDKs — Python, Java/Kotlin, TypeScript, C#/.NET, and Go. The Go SDK, on the roadmap at launch, shipped GA (go/sandbox v1.0.x, latest v1.0.2 in June 2026)
  • Persistent storage — shipped: PVC auto-provisioning fields in the SDKs, Docker named volumes, OSSFS, and Kubernetes PVC support
  • Pause/resume + snapshots — rootfs snapshot-backed pause/resume and a public snapshots API on the Kubernetes runtime
  • Sandbox Protocol — lifecycle management + execution APIs for custom runtimes
  • Docker + Kubernetes — local runs and large-scale distributed scheduling, with Helm charts, sandbox pools with auto-assign, and an image-committer component
  • Built-in environments — command, filesystem, code interpreter, browser (Chrome/Playwright), desktop (VNC/VS Code); integrations include Claude Code, OpenAI Codex, and LangGraph
  • Network policy — unified ingress gateway with per-sandbox egress controls, plus opt-in signed-endpoint secure access (OSEP-0011)
  • Windows sandboxes — PlatformSpec in the creation APIs lets callers request specific OS/architecture targets, including Windows
  • Strong isolation — gVisor, Kata Containers, Firecracker microVM
  • Supply-chain hygiene — release artifacts are signed and attested

Pricing

Free and open source (Apache-2.0), self-hosted only. As of June 2026 there is no managed or hosted OpenSandbox offering — the docs and repo describe no cloud service or pricing. Coverage at launch framed it explicitly as a free alternative to "expensive, managed sandbox services."

Competitive Position

Strengths: Most comprehensive open-source sandbox platform. Multi-language SDKs (now including GA Go). Kubernetes-native scaling. Protocol-driven extensibility. Enterprise-grade isolation. Persistent storage and snapshots shipped. Apache-2.0 with no usage fees.

Weaknesses: Self-hosted complexity. Alibaba ecosystem origins. Less developer-friendly than E2B's hosted approach. Still a newer entrant (Dec 2025).

Cautions

  • You own the ops. Northflank's critical analysis notes OpenSandbox "handles the execution protocol layer" but teams must independently manage "lifecycle orchestration, multi-tenancy, scaling" — plus demand spikes, pre-warmed pool sizing, and cold-start latency that managed services handle for you. (That analysis also flagged persistent storage as roadmap-only; it has since shipped.)
  • Governance is young. The move to opensandbox-group and CNCF Landscape listing signal independence, but Alibaba engineers still drive most development; no formal foundation governance yet.
  • No managed escape hatch. If self-hosting proves too heavy, there's no first-party hosted tier to migrate to.

What Developers Say

Despite 11k+ GitHub stars, OpenSandbox has generated little organic English-language community discussion. Its only Hacker News submission (March 2026) drew 2 points and zero comments, and searches of Reddit and X surfaced vendor and press coverage rather than first-hand practitioner reports as of June 2026. Treat the star count as interest, not yet as battle-tested production adoption outside Alibaba.

Bottom Line

OpenSandbox has matured fast since launch: the two biggest launch-day gaps — persistent storage and the Go SDK — both shipped by mid-2026, alongside pause/resume snapshots, Windows sandbox support, and signed releases. The move out of the alibaba org into opensandbox-group plus CNCF Landscape listing is a deliberate play for neutral, community-owned infrastructure status.

Recommended for: Enterprise and platform teams that want full control of an AI agent sandbox layer on their own Kubernetes, need custom runtimes or strict isolation (gVisor/Kata/Firecracker), and want zero usage-based fees.

Not recommended for: Small teams that want a sandbox in five minutes — E2B, Daytona, or other hosted services remove the orchestration, multi-tenancy, and pooling burden OpenSandbox leaves to you.

Outlook: Release velocity is high and the feature gap with hosted rivals is closing. Watch for formal foundation governance and whether a managed offering (on Alibaba Cloud or elsewhere) emerges; absent real community adoption evidence, it remains an Alibaba-driven project with open-source packaging.

Research by Ry Walker Research

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