Key takeaways
- Free native Swift Mac app with no sign-up required, supporting 33 built-in CLI agents including Claude Code, Codex, Gemini, Cursor, and Copilot
- Each agent runs in an isolated git worktree or Docker container with dedicated Ghostty terminal sessions
- Integrated agentic code review using Claude, Codex, or CodeRabbit before merge, plus Linear and Kanban workflow integration
FAQ
What is Agentastic?
Agentastic.dev is a terminal-first Mac IDE that runs 30+ AI coding agents in parallel, each in an isolated git worktree or Docker container, with native diff viewing and agentic code review.
Is Agentastic free?
Yes, Agentastic is completely free with no sign-up required. You pay agent vendors (Anthropic, OpenAI, Google) directly for agent subscriptions or API access.
What agents does Agentastic support?
Agentastic ships with 33 built-in CLI agents including Claude Code, Codex, Gemini, Cursor, GitHub Copilot, Droid, OpenCode, Amp, Goose, Aider, and Cline, and works with any terminal-based agent.
Executive Summary
Agentastic.dev is a terminal-first Mac IDE designed for developers running multiple AI coding agents simultaneously. Built natively in Swift, it provides each agent with an isolated git worktree or Docker container and a dedicated terminal session (Ghostty or SwiftTerm), plus integrated diff viewing and agentic code review capabilities.
Status (verified June 11, 2026): Alive and shipping quickly — the app advanced from v0.5.14 in February 2026 to v0.8.1 by June 2026, adding Docker container isolation, Linear integration, a Kanban board, and an expanded roster of 33 built-in CLI agents.
| Attribute | Value |
|---|---|
| Company | Agentastic |
| Founded | 2025 |
| Funding | Not publicly disclosed (appears bootstrapped) |
| Employees | Small team |
| Headquarters | Unknown |
Product Overview
Agentastic targets "10x engineers" who run multiple coding agents in parallel. Unlike simple agent wrappers, Agentastic provides a full development environment with native file editing, worktree management, and code review workflows—positioning itself as an IDE built around agents rather than an agent added to an IDE.
The core insight is that parallel agent work requires isolation. Git worktrees provide that isolation at the file system level, and Agentastic makes worktree management seamless while providing each agent its own terminal environment.
Key Capabilities
| Capability | Description |
|---|---|
| Parallel Agents | Run 30+ agents simultaneously — Claude Code, Codex, Gemini, Cursor, Copilot, and more (33 built-in) |
| Worktree or Docker Isolation | Each agent operates in its own git worktree or Docker container |
| Native Terminals | Choice of Ghostty or SwiftTerm per agent session |
| Agentic Code Review | AI-powered review via Claude, Codex, or CodeRabbit |
| Built-in Diff Viewer | Native diff and merge tools |
| Fast Code Search | Cmd+P fuzzy finder for files, symbols, and lines |
| Workflow Integration | Linear issue tracking and Kanban board organization |
Product Surfaces
| Surface | Description | Availability |
|---|---|---|
| macOS App | Native Swift application | GA (0.8.1 as of June 2026) |
Technical Architecture
Agentastic is built natively in Swift for optimal Mac performance. It integrates with Ghostty, a GPU-accelerated terminal emulator, for agent sessions. Worktree creation and management is handled automatically—developers add their repo, and Agentastic handles the git worktree lifecycle.
Key Technical Details
| Aspect | Detail |
|---|---|
| Deployment | Local Mac app (macOS 14.0+, Apple Silicon and Intel) |
| Language | Swift (native macOS) |
| Terminal Options | Ghostty or SwiftTerm |
| Isolation | Git worktrees or Docker containers, local (managed by app) |
| Open Source | No (closed development; open ecosystem stated as a goal) |
How It Works
- Add your git repo — Agentastic handles worktree creation and management
- Deploy agents — Each worktree gets dedicated Ghostty terminals; run any CLI agent
- Review code — Built-in diff viewer and optional agentic code review before merge
Strengths
- Terminal-first philosophy — Real terminal sessions (Ghostty) rather than pseudo-terminals; full CLI power per agent
- Automatic worktree isolation — No manual worktree management; each agent gets true filesystem isolation
- Completely free — No subscription, no sign-up, no usage limits on the app itself
- Agent-agnostic — 33 built-in CLI agents including Claude Code, Codex, Gemini, Cursor, GitHub Copilot, Droid, OpenCode, Amp, Goose, Aider, and Cline, plus any terminal-based agent
- Agentic code review — Unique feature: AI reviews agent code before merge using Claude, Codex, or CodeRabbit
- Native Mac performance — Swift codebase optimized for macOS; feels responsive and native
Cautions
- Mac-only — Requires macOS 14.0 (Sonoma) or later; no Windows or Linux support
- Closed source — No visibility into codebase or ability to self-host
- Early extensibility — Extensibility remains "on the roadmap" but not yet available as of June 2026
- Learning curve — Worktree-based workflow may be unfamiliar to developers used to single-branch development
- Unknown monetization — Still free with no disclosed funding or revenue model as of June 2026; long-term sustainability is unproven
- No public adoption signals — Closed source with no GitHub repository, download counts, or community metrics to gauge traction
What Developers Say
Community discussion is thin: a single Show HN thread (January 5, 2026 — 11 points, 22 comments) is the only substantive venue found, and no Reddit discussion surfaced as of June 11, 2026. Reactions there split between enthusiasm for the approach and skepticism about parallel-agent workflows generally:
"This project is on point. it's going to be a boom year for Terminal Multiplexing." — jauntywundrkind, Hacker News
"Each one needs to build its own context, wastes tokens understanding the same code, and can write variations of same solution." — avree, Hacker News
"I can barely keep up with what a single agent is doing! Just thinking about herding five makes me nervous." — isoprophlex, Hacker News
"I need solid guarantees it won't rm -rf / my entire system while still allowing full stack access." — mrtesthah, Hacker News
Notably, most criticism targets the multi-agent paradigm rather than Agentastic's implementation — the product itself drew little direct fault-finding, but also little direct praise.
Pricing & Licensing
| Tier | Price | Includes |
|---|---|---|
| Free | $0 | Full app, unlimited worktrees, all features |
Licensing model: Free closed-source app; BYOK for agents
Hidden costs: Agent subscriptions (Claude Code, Codex, etc.) or API access are paid separately to vendors
Competitive Positioning
Direct Competitors
| Competitor | Differentiation |
|---|---|
| Acepe | Agentastic provides terminals + worktrees; Acepe focuses on ACP protocol |
| Commander AI | Agentastic is terminal-first with worktrees; Commander is prompt→diff→commit workflow |
| Auto-Claude | Agentastic is for parallel manual orchestration; Auto-Claude is for autonomous execution |
When to Choose Agentastic Over Alternatives
- Choose Agentastic when: You want full terminal access per agent with worktree isolation
- Choose Acepe when: You prefer a lighter-weight multi-agent interface without full IDE
- Choose Auto-Claude when: You want autonomous multi-agent execution with a Kanban interface
Ideal Customer Profile
Best fit:
- Developers comfortable with terminal-based workflows
- Teams running multiple agents on the same codebase simultaneously
- Engineers who value worktree-based branch isolation
- Power users who want Ghostty integration
Poor fit:
- Developers preferring GUI-only interfaces
- Teams needing Windows or Linux support
- Users wanting fully autonomous agent orchestration
Viability Assessment
| Factor | Assessment |
|---|---|
| Financial Health | Unknown (free model, funding not publicly disclosed) |
| Market Position | Strong (differentiated) |
| Innovation Pace | Fast — v0.5.14 → v0.8.1 between February and June 2026 |
| Community/Ecosystem | No public metrics; closed development with open ecosystem as stated goal |
| Long-term Outlook | Positive if sustainable |
As of June 2026 the product is clearly alive: the shipping cadence between February and June 2026 added Docker isolation, Linear and Kanban integration, and nearly tripled the built-in agent roster to 33. The free model and feature velocity suggest either venture backing, a planned premium tier, or a well-resourced passion project — none of which is publicly confirmed.
Bottom Line
Agentastic.dev is the most terminal-native option in the Mac coding agent app space, and as of June 2026 it is one of the fastest-moving — adding Docker isolation, Linear/Kanban workflow features, and 33 built-in agents since February. Its combination of worktree-or-container isolation, Ghostty integration, and agentic code review creates a compelling workflow for developers who want agent power without giving up terminal control.
Recommended for: Terminal-oriented developers running multiple agents who want worktree or Docker isolation and native Mac performance
Not recommended for: Developers preferring visual IDEs, Windows/Linux users, or those seeking fully autonomous agent orchestration
Outlook: Strong product-market fit for terminal-first developers and rapid release velocity; sustainability of the free, closed-source model with no disclosed funding remains the main question
Research by Ry Walker Research • methodology