# Xum (formerly Mux) — AI Coding Tool Review & Pricing

> Xum is a desktop and web application designed for running multiple AI coding agents in parallel across isolated workspaces. It allows developers to manage complex, long-running agentic tasks with a centralized view of git divergence and support for various execution environments.

Source: https://ai.dosa.dev/tools/mux · Updated Nov 1, 2026 · Category: Terminal & CLI Agents · Published by dosa.dev

## At a glance

- **Tool**: Xum (formerly Mux)
- **Company**: Coder
- **Category**: [Terminal & CLI Agents](https://ai.dosa.dev/category/cli-agents)
- **Pricing model**: Open Source
- **Official website**: https://coder.com/products/mux

## Key features

- Isolated workspaces for parallel agent execution
- Multi-model support including Sonnet, Grok, GPT, and Claude via OpenRouter or Ollama
- Support for local, git worktree, and SSH execution runtimes
- Git divergence visualization and centralized agent status monitoring
- Agentic workflows including Plan/Exec modes, rich markdown output, and vim input support

## Pricing

**Model**: Open Source

The tool is open-source under the AGPL-3.0 license with no listed paid plans.

## Who it is for

- **Best for**: Developers who need to run multiple AI coding agents simultaneously for long-running tasks, testing, or rapid prototyping without IDE-based constraints.
- **Not ideal for**: Users seeking a general-purpose IDE replacement, Windows-native users, or organizations that require permissive licenses, as Xum is licensed under AGPL-3.0 and currently lacks native Windows binaries.

## Verdict

Xum is a powerful, enterprise-focused tool that acts as an 'excavator' for agentic workflows, providing the isolation and visibility necessary to manage high-scale, parallel AI operations that standard editor-bound assistants cannot handle.

## Recent updates

Recent releases include the project rename from Mux to Xum, addition of Grok 4.6 as a default model, improved SSH setup speeds, and updated agent capabilities like /goal and /btw for better orchestration and non-disruptive Q&A.

## Frequently asked questions

### Is Xum (formerly Mux) free?

Yes - Xum (formerly Mux) is Open Source. The tool is open-source under the AGPL-3.0 license with no listed paid plans.

### Is Xum (formerly Mux) open source?

Yes - Xum (formerly Mux) is open source. The tool is open-source under the AGPL-3.0 license with no listed paid plans.

### Who is Xum (formerly Mux) best for?

Developers who need to run multiple AI coding agents simultaneously for long-running tasks, testing, or rapid prototyping without IDE-based constraints.

### Who is Xum (formerly Mux) not ideal for?

Users seeking a general-purpose IDE replacement, Windows-native users, or organizations that require permissive licenses, as Xum is licensed under AGPL-3.0 and currently lacks native Windows binaries.

### What are the best Xum (formerly Mux) alternatives?

The closest Xum (formerly Mux) alternatives on ai.dosa.dev are Claude Code, Codex CLI, Amp - all listed under Terminal & CLI Agents.

### Who makes Xum (formerly Mux)?

Xum (formerly Mux) is developed by Coder. It is listed in the Terminal & CLI Agents category on ai.dosa.dev.

## Top alternatives

- [Claude Code](https://ai.dosa.dev/tools/claude-code) (Freemium) — Developers comfortable with terminal-based workflows who need an assistant to handle multi-hour tasks like complex refactors, full-stack bug fixes, and project migrations.
- [Codex CLI](https://ai.dosa.dev/tools/codex-cli) (Freemium) — Handling mechanical, well-scoped engineering tasks like updating dependencies, refactoring based on clear patterns, writing unit tests, and CI/CD configuration.
- [Amp](https://ai.dosa.dev/tools/amp) (Freemium) — Terminal-comfortable developers requiring parallel, long-running agent tasks on remote infrastructure.
- [Aider](https://ai.dosa.dev/tools/aider) (Open Source) — Developers who live in the terminal, prioritize granular git history, or require AI coding assistance in IDE-less or remote SSH/Docker environments.
- [Gemini CLI](https://ai.dosa.dev/tools/gemini-cli) (Freemium) — Enterprise organizations and professional developers using Gemini Code Assist or Google Cloud infrastructure who require a persistent, agentic coding assistant in the terminal.
- [Goose](https://ai.dosa.dev/tools/goose) (Free) — Developers and teams who require a vendor-neutral, highly extensible agent platform that supports local execution and complex, multi-step workflow automation.
- Full alternatives guide: https://ai.dosa.dev/tools/mux/alternatives