24,302stars+83(+0.3%) Last 30 days
- Last commit 10 hours ago
- Repository age 1 year
- Version 1.2.5
- License [MIT](https://openalternative.co/licenses/mit)
- Self-hosted [Yes](https://openalternative.co/collections/self-hosted)
- Repository [slopus/happy](https://github.com/slopus/happy)
Happy is a harness for AI coding agents. Instead of juggling separate interfaces for Claude, Codex, and Grok, you get one app that connects to all three using the subscriptions you already have. No new API costs, no separate billing layer.
The core idea is straightforward: pick the model that fits the task, run it, and let Happy manage the session. You can delegate work to subagents across different providers from the same interface, which matters when one model handles a task better than another.
Key capabilities:
- Multi-provider orchestration connects Claude, Codex, and Grok in one place, each using its vendor's native prompts and tooling
- Subscription reuse means you sign in with your existing Claude, Codex, and Grok accounts rather than paying for another service on top
- End-to-end encrypted mobile app lets you resume or start sessions from your phone when you're away from your desk, with encrypted sync between devices
- Team server support makes it natively multiplayer: deploy a shared server, and everyone authenticates as themselves while sharing projects and sessions
- Terminal compatibility keeps the CLI-first workflow intact; start Claude Code or Codex in your terminal and pick up that session anywhere
Projects stay as ordinary folders on your own hardware. The code is MIT-licensed, so you can read it, fork it, or ship a custom build. For teams that want a conductor-style layer over multiple AI agents without locking into a managed platform, Happy handles that without adding another subscription to the pile.
Every Sunday we deconstruct one proprietary app and pick the best open source alternatives worth switching to.
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AI
Run multiple AI coding agents in parallel, side by side
- Stars Stars growing quickly over the last 30 days105,166
- Last commit 9 hours ago
- License MIT
Agent Development Environment that runs Claude Code, Codex, Gemini, and other CLI agents in parallel across isolated git worktrees, with terminals, browser, diff review, and git tools built in.
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macOS app that orchestrates multiple AI coding agents simultaneously, each in its own isolated Git worktree, so you can work on many tasks at once.
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Desktop coding workspace that connects to AI subscriptions you already have, with parallel agents, worktrees, one-click PRs, and multi-project management.
Run multiple AI coding agents in isolated Git worktrees, with cross-repo context, GitHub/Linear integrations, and support for Claude, Codex, Cursor, and more.
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Last commit 2 days ago
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License Apache-2.0 A Mac app that brings multiple AI coding agents into a single window, running on your existing subscriptions with parallel agent sessions, PR management, and a built-in browser.