OpenSandbox vs sandbase-harness
Self-hosted AI agent runtimes compared
OpenSandbox provides isolated environments for AI applications to run code, commands, and browser or desktop tasks. sandbase-harness manages agent sessions, tools, memory, credentials, and event history; the main difference is OpenSandbox’s focus on sandbox execution versus sandbase-harness’s broader agent runtime.
OpenSandbox: Run AI Agents in Isolated Sandboxes
OpenSandbox provides isolated environments where AI applications can run code, commands, and browser or desktop tasks. It supports local Docker use and Kubernetes deployment through a shared sandbox API.
sandbase-harness: Run Self-Hosted AI Agents with Sandboxed Tools
SandBase Harness is a local-first AI agent runtime and MCP bridge, with a built-in Console and Anthropic Claude Managed Agents-style API. It provides sessions, sandboxed tools, memory, credential controls, and audit and replay on your own machine or infrastructure.
| OpenSandbox | sandbase-harness | |
|---|---|---|
| Language | Python | TypeScript |
| License | Apache-2.0 | Apache-2.0 |
| Stars | 15.7k | 639 |
| Forks | 1.4k | 80 |
| Last analyzed | Oct 3, 2026 | Oct 19, 2026 |
Key differences
- OpenSandbox centers on sandbox lifecycle and execution, while sandbase-harness adds persistent sessions, event replay, and agent operations.
- OpenSandbox offers SDKs for Python, Java/Kotlin, JavaScript/TypeScript, C#/.NET, and Go; sandbase-harness provides an official TypeScript SDK and documents Anthropic SDK compatibility.
- OpenSandbox supports local Docker and Kubernetes deployment; sandbase-harness also supports local-process execution and self-hosted workers, and Docker is not required for local execution.
- OpenSandbox supports browser and desktop automation alongside coding and evaluation workloads; sandbase-harness emphasizes governed tools, approvals, audit trails, and MCP client integration.
- Both projects use the Apache-2.0 license and are not archived. OpenSandbox is written in Python and has 15.7k stars; sandbase-harness is written in TypeScript and has 681 stars.
Choose OpenSandbox if you…
- need isolated environments for code, command, browser, or desktop tasks.
- want a shared sandbox API with integrations across several programming languages.
- plan to use Docker locally or deploy sandboxes on Kubernetes.
Choose sandbase-harness if you…
- need persistent agent sessions with resumable event streams, replay, and audit history.
- want tool governance with permission policies, approvals, and credential management.
- prefer a local-first agent runtime with a Console, `/v1` API, and MCP bridge.
Compare the numbers side by side, or add more projects
This comparison is generated with AI from the OSRepos analyses of both projects. Always check each project's repository and documentation before choosing.