Agentic-first
Run Claude, Codex, Gemini, and other ACP agents directly where the work happens. Add MCP servers from the built-in marketplace.
Agentic. Parallel. Native.
Aizen
A macOS workspace for parallel development. Run agents, terminals, and browsers side by side across every branch.
Available now on macOS. Apple Silicon only.
What makes it different
Agentic-first, parallel by default, native on macOS, and open source from the start.
Parallel
Each project or branch gets its own environment with terminal panes, file tabs, browser tabs, and chat history.
Native
Built for macOS with GPU-accelerated terminal, Metal rendering, and native platform integration.
Open source
The code is public under GPL-3.0, inspectable, and developed in the open.
What you can do with it
Manage projects, run agents, and keep every environment ready.
Workspace and project management
Group active projects into workspaces, then create environments for the branches or tasks that are active right now.
Run agents where the work happens
Run Claude, Codex, OpenCode, Gemini, and other ACP agents. Add MCP servers per agent from inside the app.
GPU terminal with persistence
GPU-accelerated terminal powered by libghostty with split panes, presets, themes, and optional tmux persistence.
Git, review, and CI in one place
Stage, commit, diff, review pull requests, and keep GitHub Actions or GitLab CI runs within reach.
Where it is useful
Useful for parallel development, agent workflows, code review, and project management.
Parallel development
Work across multiple branches or projects without losing your place. Each environment keeps its own state.
Agent workflows
Run multiple agents in parallel across different environments. Watch them work while you review in another.
Code review
Review pull requests with inline diffs, file browser, and terminal access in the same environment.
Project management
Group projects into workspaces, track CI runs, and keep everything organized in one native app.
Simple pricing
Free, Pro, and Lifetime. Use the full core app for free.
Free
The full core workspace, free forever
$0
- ✓Unlimited workspaces & worktrees
- ✓ACP agents and MCP servers
- ✓GPU terminal with tmux persistence
- ✓File and web browser
- ✓Voice input and attachments
- ✓Visual Git diff and review
- ✓GitHub Actions & GitLab CI
- ✓Xcode integration
- ✓CLI companion
Pro
Fund ongoing development
$59 /yr Save 20%
- ✓Everything in Free
- ✓Support continued development
- ✓Priority support
- ✓Future paid extras
30-day money-back guarantee.
Best Value
Lifetime
One-time purchase, best value
$179
- ✓Everything in Free
- ✓Support continued development
- ✓Priority support forever
- ✓Future paid extras
Pro is $5.99/mo or $59/yr. Lifetime is $179.
Why I built it
Too many windows
Developers working across multiple projects or branches usually juggle terminals, editor windows, docs, CI dashboards, and agent chats. Aizen keeps that stack attached to each environment.
Agents need a workspace
Running agents in a terminal is fine for one task. But when you have multiple agents across branches, you need a workspace that keeps them organized.
Native matters
I do not want one heavy interface forced onto every platform. The app should feel right where it runs.
Keep it useful
The goal is a tool that stays good at parallel development, agents, and project management instead of expanding into noise.
Available now on macOS.
An agentic-first workspace for parallel development. Open source and free to use.
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