# Microsoft Execution Containers (MXC) — AI Coding Tool Review & Pricing

> MXC is a sandboxed code execution system designed for running untrusted code, such as AI model output, plugins, and tools, on Windows, Linux, and macOS. It provides a policy-driven containment layer that allows developers to define strict resource access rules for workloads, which are then enforced by platform-native backends.

Source: https://ai.dosa.dev/tools/mxc · Updated Oct 15, 2026 · Category: Developer Productivity & Workflow · Published by dosa.dev

## At a glance

- **Tool**: Microsoft Execution Containers (MXC)
- **Company**: Microsoft
- **Category**: [Developer Productivity & Workflow](https://ai.dosa.dev/category/productivity)
- **Pricing model**: Open Source
- **Official website**: https://github.com/microsoft/mxc

## Key features

- Policy-driven sandboxing for filesystem, network, and UI access
- Cross-platform support using native backends like ProcessContainer, Bubblewrap, Seatbelt, and MicroVMs
- Unified JSON-based configuration schema and stable V1 SDKs for Rust,.NET, and Node.js
- Lifecycle management for both one-shot execution and persistent containers
- Diagnostic tools including audit and learning modes to refine least-privilege security policies

## Pricing

**Model**: Open Source

MXC is free and open-source under the MIT license.

## Who it is for

- **Best for**: Developers building AI agents, coding assistants, or plugin hosts who need to embed secure, policy-controlled code execution into their applications.
- **Not ideal for**: Users looking for a standalone agent sandbox CLI tool or a hosted sandbox service, as MXC is an SDK intended for integration directly into custom applications.

## Verdict

A robust, cross-platform containment foundation from Microsoft that is highly effective for developers needing to securely execute model-generated code within their own tools, though some advanced Windows backends remain experimental.

## Recent updates

Microsoft announced the general availability (GA) of MXC on October 7, 2026, alongside the release of the stable v1 SDKs. Recent updates also include support for Windows 11 24H2/25H2 capabilities and new directional networking policies in the 0.9 and 1.0 schema versions.

## Frequently asked questions

### Is Microsoft Execution Containers (MXC) free?

Yes - Microsoft Execution Containers (MXC) is Open Source. MXC is free and open-source under the MIT license.

### Is Microsoft Execution Containers (MXC) open source?

Yes - Microsoft Execution Containers (MXC) is open source. MXC is free and open-source under the MIT license.

### Who is Microsoft Execution Containers (MXC) best for?

Developers building AI agents, coding assistants, or plugin hosts who need to embed secure, policy-controlled code execution into their applications.

### Who is Microsoft Execution Containers (MXC) not ideal for?

Users looking for a standalone agent sandbox CLI tool or a hosted sandbox service, as MXC is an SDK intended for integration directly into custom applications.

### What are the best Microsoft Execution Containers (MXC) alternatives?

The closest Microsoft Execution Containers (MXC) alternatives on ai.dosa.dev are Pieces for Developers, agenttrace, Vibe Kanban - all listed under Developer Productivity & Workflow.

### Who makes Microsoft Execution Containers (MXC)?

Microsoft Execution Containers (MXC) is developed by Microsoft. It is listed in the Developer Productivity & Workflow category on ai.dosa.dev.

## Top alternatives

- [Pieces for Developers](https://ai.dosa.dev/tools/pieces-for-developers) (Freemium) — Developers and teams who need to manage disparate workflow context, revisit past coding decisions, and maintain consistent documentation across multiple tools and projects.
- [agenttrace](https://ai.dosa.dev/tools/agenttrace) (Open Source) — Developers who need a privacy-conscious way to audit, monitor, and diagnose the behavior, costs, and performance of various AI coding agents locally.
- [Vibe Kanban](https://ai.dosa.dev/tools/vibe-kanban) (Free) — Solo developers and individual power users who need to run multiple AI coding agents in parallel while managing separate git worktrees and tasks locally.
- [ai-memory](https://ai.dosa.dev/tools/ai-memory) (Open Source) — Developers who frequently switch between multiple AI coding agents or machines and want a unified, persistent knowledge base that survives session ends and tool switches.
- [smolvm](https://ai.dosa.dev/tools/smolvm) (Open Source) — Running untrusted code, powering coding agents with persistent/resettable workspaces, and deploying portable VM-based workloads that require a real Linux kernel.
- [coop](https://ai.dosa.dev/tools/coop) (Open Source) — Security-conscious developers who want to run autonomous coding agents on real projects without risking host machine compromise.
- Full alternatives guide: https://ai.dosa.dev/tools/mxc/alternatives