Aizen is unclaimed —

Aizen

A macOS workspace for parallel development.·aizen.win

Aizen is an agentic-first macOS workspace that lets developers run AI agents, terminals, and browsers side by side across every branch. Each project or branch gets its own environment with terminal panes, file tabs, browser tabs, and chat history. It supports ACP agents (Claude, Codex, Gemini, OpenCode), MCP servers, Git review, and CI views from GitHub Actions and GitLab CI. The app is open source and available for Apple Silicon Macs.

What it's for

Parallel development across multiple branches or projectsRunning multiple AI agents in parallel across environmentsCode review with inline diffs and terminal accessProject management by grouping projects into workspaces and tracking CI runs

Features 16

ACP agents (Claude, Codex, Gemini, OpenCode)
Agent Client Protocol (ACP) support
Agentic-first workflow
CLI companion
File and web browser tabs
Git worktree management
GitHub Actions and GitLab CI views
Integrated GPU-accelerated terminal (libghostty)
MCP server marketplace
Project environments
tmux-backed terminal persistence
Unlimited workspaces & worktrees
Visual Git diff and review
Voice input and attachments
Workspace organization
Xcode integration

At a glance

free tieropen source

TypeDesktop app

DeploymentInstalled (local)

PlatformsmacOS

Fordevelopers

CompanyVivy Technologies Co., Limited

Integrations

GitHubGitLabXcodeClaudeCodexGeminiOpenCodeGitHub ActionsGitLab CI

Resources

Pricing

Pro costs $5.99/mo or $59/yr (20% savings on yearly). Lifetime is a one-time purchase of $179. 30-day money-back guarantee applies to Pro subscriptions.

FreeFree

The full core workspace, free forever

Unlimited workspaces & worktrees; full core app free forever

Pro$5.99/mo

Pro is $5.99/mo or $59/yr (save 20% billed yearly); 30-day money-back guarantee

LifetimeQuote

One-time purchase of $179, described as best value

Save 20% when subscribing yearly to Pro