amux vs Windsurf

Windsurf excels at interactive AI coding in an IDE. amux runs your agents overnight while you sleep. They solve different problems.

Last updated: July 16, 2026

What each tool is built for

Windsurf (by Codeium, formerly Codeium Editor) is an AI-first IDE built on a VS Code fork — so you get the full VS Code extension ecosystem alongside deep AI integration baked into the editor itself. Its headline feature is Cascade, a real-time AI flow that maintains awareness of your entire codebase across edits, not just the current file. Cascade connects changes, understands how code flows across files, and proactively suggests next steps as you work. SWE-2 is Windsurf's autonomous agent mode — it can plan multi-step tasks, execute terminal commands, edit files, and iterate without constant human prompting. Additional features include Tab (next-line completions), Supercomplete (multi-line fill-in), and multi-model support (Claude, GPT-4, Gemini). Pricing: free tier with limits, $15/month Pro, $40/month Teams. Proprietary license. Approximately 45K+ GitHub stars for the ecosystem.

amux (~299 GitHub stars, much newer and purpose-built for orchestration) is the open-source control plane for running an AI engineering team from a single dashboard or your phone. It launches, monitors, and self-heals dozens of parallel Claude Code, OpenAI Codex CLI, or Gemini CLI sessions headlessly in tmux — no IDE, no VS Code, no desktop required. The web dashboard shows live terminal output from every session at once. The iOS app gives you remote monitoring and control from anywhere. A built-in kanban board lets agents atomically claim tasks so no two sessions ever duplicate work. Self-healing handles context exhaustion, crashes, and stuck prompts automatically. Install: brew install mixpeek/amux/amux or pipx install amux. Open source (MIT) — single Python file, zero external dependencies — at github.com/mixpeek/amux.

The core difference: interactive IDE agent vs unattended fleet at scale

Windsurf is built for the present tense: you are at your desk, inside the IDE, with Cascade aware of what you are actively changing. SWE-2 can run autonomously for longer stretches, but Windsurf's architecture assumes you are present — the agent runs in the context of a live IDE session, on your desktop, on a single codebase at a time. When you close Windsurf, the agent stops. You cannot run 15 Windsurf agents simultaneously on 15 different tasks without opening 15 separate IDE windows and manually managing each one.

amux is built for the overnight queue: load 20 tasks onto the kanban board before bed, 10 agents claim tasks atomically and work in parallel overnight, and you review 20 completed branches in the morning from your iPhone over coffee. The self-healing watchdog handles context exhaustion (auto-compact and resume), crashes (restart and replay), and stuck prompts without any human intervention. No IDE, no VS Code, no desktop presence required. The fleet runs whether or not you are at your desk — and the iOS app keeps you in control when you are anywhere else.

These tools do not compete for the same moment. Windsurf is the best AI IDE for interactive development where codebase awareness and editor-native completions matter. amux is the infrastructure layer for running agents at scale while you sleep, travel, or work on something else entirely.

Feature comparison

How Windsurf works

Windsurf is a VS Code fork that replaces the standard editor with a deeply AI-integrated alternative. Cascade is the core AI layer: it maintains a model of your entire codebase, not just the file you have open, and uses that awareness to make suggestions, complete edits, and understand the ripple effects of changes across files. As you edit, Cascade sees what changed, why it changed in context, and what likely needs updating elsewhere.

SWE-2 is Windsurf's autonomous mode — you describe a multi-step task, SWE-2 plans it, then executes it across terminal commands, file edits, and test runs. Unlike Cascade (which is reactive and follows your lead), SWE-2 takes initiative and works through a plan. It is a meaningful step toward unattended agent behavior, but it still operates within a single IDE session: one agent, one codebase, on your desktop. Tab and Supercomplete handle the routine in-file completion work that happens continuously as you type.

Windsurf supports multiple AI backends (Claude, GPT-4, Gemini), so you are not locked to a single model. The VS Code fork means all your existing extensions, keybindings, and workspace settings carry over. For developers who already live in VS Code, Windsurf is a drop-in that adds powerful AI layers without a workflow change.

How amux works

amux manages a fleet of tmux sessions, each running a Claude Code, Codex CLI, or Gemini CLI process headlessly. A SQLite database tracks session state, kanban board items, messages, and schedules. The web dashboard streams live output from every session via Server-Sent Events so you can watch all agents simultaneously. The iOS app connects to the same API over the local network or via the cloud tier.

When an agent's context window fills up, amux's watchdog detects it, sends the compact command, waits for the agent to resume, and replays any pending messages — all automatically, without human intervention. When an agent crashes, the watchdog restarts it. When an agent finishes a task and marks it done on the board, the next available agent picks up the next todo item via an atomic compare-and-swap claim so no work is ever duplicated across the fleet.

The built-in toolbox goes beyond coding agents: scheduler for recurring tasks, notes for shared context, CRM and Gmail API email for customer-facing agent workflows, and browser automation for research and interaction tasks — all managed from the same dashboard and controllable from the iOS app.

Where Windsurf is the better fit

• Interactive feature development with deep codebase awareness. Cascade's continuous model of your full codebase makes Windsurf exceptional for complex features where changes ripple across many files. It sees the implications of each edit in real time — not just the file you have open. If you are building something new and want an AI copilot that understands your full project architecture as you go, Cascade is purpose-built for that.
• VS Code users who want AI that deeply integrates with their editor. Windsurf is a VS Code fork — all your extensions, keybindings, themes, and muscle memory carry over. If you already live in VS Code, switching to Windsurf costs almost nothing and adds Cascade, SWE-2, Tab, and Supercomplete without changing your workflow.
• Tab completions and Supercomplete while writing code. amux does not have an editor. If you want AI completing the next line (or next block) as you type, Windsurf's Tab and Supercomplete are designed for exactly that. This is an in-editor concern that amux — a headless fleet orchestrator — is not built to address.
• Autonomous in-editor tasks with SWE-2. For a well-defined, self-contained task — implement this endpoint, write tests for this service, refactor this module — SWE-2 handles it autonomously within Windsurf with no manual step-by-step prompting. Good for tasks you want finished before you close the IDE, not overnight.
• Multi-model flexibility in a single editor. Windsurf supports Claude, GPT-4, Gemini, and other providers in one interface. If you regularly switch models for different tasks within an interactive coding session, Windsurf handles this natively without additional tooling.

Where amux is the better fit

• Running 10–50 parallel agents overnight while you sleep. Queue work before bed, agents claim tasks from the shared board, work in parallel through the night, and you review completed branches in the morning from your phone. Windsurf has no fleet model — each IDE window is one uncoordinated agent that requires you to be present. See how to run 10+ agents in parallel.
• Unattended batch operations — test generation, docs, refactoring at scale. The self-healing watchdog handles context exhaustion, crashes, and stuck prompts automatically. YOLO mode lets agents auto-approve safe actions so the fleet keeps moving without a human at the keyboard. Windsurf's agents stop when the IDE closes.
• Remote monitoring and steering from your phone. The iOS app and installable PWA let you inspect live terminal output from every session, see which tasks are claimed on the board, send steering messages to any agent, approve pending quality gates, and manage the fleet — all from your iPhone. If you board a flight or step away from your desk, the fleet keeps running. Windsurf has no mobile story.
• Coordinated parallel work with quality gates. amux's quality gate system requires human or automated approval before agents proceed past defined checkpoints — at the fleet level. Agents share a kanban board with atomic task claiming so no two sessions ever duplicate work. Inter-session messaging via REST API lets agents share results and build on each other's output. Windsurf sessions are isolated with no coordination layer between them.
• Full business operations alongside coding agents. amux includes CRM, Gmail API email, a scheduler, notes, and browser automation in the same control plane as your coding sessions. Teams use it for customer support agents, market research, automated reporting, and CI orchestration alongside parallel coding work. This goes well beyond what any IDE is designed to handle.
• Server or headless deployments — no desktop required. amux runs headlessly on any Mac or Linux server, in Docker, or on a cloud VM. If you want AI agents running on a remote machine, in a CI/CD pipeline, or on a dedicated server you SSH into, amux fits naturally. Windsurf requires a desktop installation and an active display.

Why not both? A day in the life using Windsurf + amux

Windsurf and amux address opposite ends of the AI coding spectrum: Windsurf handles interactive work where you are present and watching; amux handles fleet-scale batch work where you are not. Most serious AI developers end up needing both. Here is what that workflow looks like:

Morning — review overnight amux fleet output. You open the amux iOS app over coffee. Eight tasks completed overnight. Six branches are ready to review in GitHub, two agents are waiting at quality gates for your go-ahead. You peek at the terminal output for each, approve the gate on the two waiting agents, and mark all eight board items done with a short summary. None of this required opening your laptop — you did it from your phone while the coffee brewed.

Day — interactive feature work in Windsurf. You open Windsurf. There is a complex new API surface with subtle business logic — the kind where you want Cascade tracking the full architecture as you build it. Cascade sees how your new endpoint connects to the existing auth layer, flags a schema inconsistency in a related module, and Supercomplete fills in the boilerplate while you focus on the logic. SWE-2 runs the test suite autonomously after each major change. You stay in the IDE the whole time.

Evening — queue tomorrow's amux batch before closing the laptop. Before you shut down, you add items to the amux board: generate integration tests for the feature you built today, update API documentation across twelve modules, run a parallel refactor of the legacy session handling layer across four services, and produce a dependency audit across the monorepo. You set a quality gate on the refactor so agents pause before merging any branch. You close your laptop. The fleet runs overnight.

The tools cover the full spectrum. Windsurf for the interactive coding hours where codebase awareness, completions, and IDE integration matter. amux for the unattended hours where throughput, self-healing, and remote monitoring are the bottleneck.

Use case decision guide

Frequently Asked Questions

Is amux a Windsurf alternative?

Not exactly — they solve different problems. Windsurf is an AI-first IDE for interactive coding sessions. amux is a headless orchestrator that runs dozens of parallel agents overnight, unattended, with a web dashboard and iOS app for remote monitoring. Most developers who use amux also use an IDE like Windsurf or Cursor for interactive work — the two tools cover different moments in the workflow.

Can Windsurf run multiple agents in parallel?

Windsurf runs one SWE-2 autonomous agent at a time per IDE window. To run 10+ agents in parallel, you would need to open 10+ Windsurf windows manually, with no shared task board, no inter-agent coordination, and no self-healing if a session gets stuck. amux is purpose-built for this use case: it launches dozens of Claude Code or Codex CLI agents simultaneously with a shared kanban board for task coordination and a self-healing watchdog that keeps them all running overnight. See how to run 10+ agents in parallel.

Does amux have an IDE?

No — amux is intentionally headless. It runs AI coding agents (Claude Code, Codex CLI, Gemini CLI) in terminal sessions managed by tmux and provides a web dashboard and iOS app for monitoring and control. You write code in your preferred IDE — Windsurf, Cursor, VS Code, Vim — and use amux to scale up the agent work that happens in the background while you work on something else or while you sleep.

Which is better for solo developers shipping overnight?

amux. Its core use case is running 10–50 parallel AI coding agents overnight while you sleep, with a self-healing watchdog that automatically recovers from context exhaustion and crashed sessions. You wake up to finished PRs and completed tasks instead of crashed terminals and blank screens. Windsurf is optimized for interactive coding sessions where you are present at your desk.

Can I use amux and Windsurf together?

Yes — they complement each other perfectly. Many developers use Windsurf for interactive coding during the day (in-editor Cascade completions, quick fixes, SWE-2 autonomous tasks while present) and amux for batch operations at night (generating tests, refactoring modules, reviewing PRs across a monorepo with 10+ parallel agents). The two tools operate in completely different moments of the workflow — using both covers the full spectrum of AI-assisted engineering.

Quick start with amux

# Install via Homebrew (recommended on macOS)
brew install mixpeek/amux/amux

# Or via PyPI
pipx install amux

# Or zero-install trial (no install needed)
uvx amux serve

# Register a project and launch the dashboard
amux register myproject --dir ~/Dev/myproject
amux serve  # → https://localhost:8822

See the getting started guide for a full walkthrough, how to run 10+ agents in parallel for fleet operations, and the quality gates guide for human-in-the-loop checkpoints at fleet scale. If you already use Windsurf for interactive work, amux adds the overnight batch layer on top without changing a thing about your daytime coding workflow.

See also

• All amux comparisons
• amux vs Cursor
• amux vs Cline (Roo Code)
• Best AI agent multiplexers in 2026
• Getting started with amux
• Running 10+ agents in parallel
• AI agent quality gates
• Mobile PWA and iOS app

brew install mixpeek/amux/amux
amux register myproject --dir ~/Dev/myproject
amux serve  # → https://localhost:8822