1Code: A visual client for parallel coding work with Claude Code and Codex.
Open source plan: self-hosted local desktop client (macOS, Windows, Linux), full source code access, community support via GitHub. Forever free.
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Free Type
Open Source
Credit Card
Not required
Verification
✓ Human-checked
About 1Code
A visual client for parallel coding work with Claude Code and Codex.
Parallel coding with multiple AI agents, visual git integration, and background execution.
1Code is an open-source, visual client designed for parallel coding work with leading AI agents like Claude Code and Codex. Created by 21st, it provides a calm, keyboard-first interface that lets developers switch between agents seamlessly, combine their strengths, and ship code faster without touching the terminal. The tool stands out by offering a 1Code free Open Source plan that is forever free, allowing anyone to self-host the full-featured desktop client on macOS, Windows, or Linux. With full access to the source code and community support on GitHub, it empowers individual developers and teams to inspect, customize, and improve the platform transparently. The 1Code free Open Source tier delivers core functionality, including parallel agent sessions with full context isolation, built-in visual Git integration, and keyboard shortcuts for efficient navigation. Background agents can continue running even when your laptop is closed, thanks to isolated cloud sandboxes, though this feature is part of the Pro tier. The open source nature ensures that developers can contribute back or fork the project to suit their needs. For those who want to extend capabilities, 1Code supports the MCP protocol, enabling connections to tools like Notion, Linear, Slack, and more, all from a unified UI. This makes the 1Code free Open Source client not just a starting point but a solid foundation for advanced coding workflows. By providing an accessible path to AI-driven development, 1Code helps teams reduce context switching, manage Git operations visually, and automate routine tasks. The project is backed by Y Combinator and trusted by teams at Vercel, monday.com, and others. Whether you're working on multiple features simultaneously or seeking to integrate coding agents into your daily pipeline, the tool's Pro and Max plans add productivity layers, but the free open source tier remains a powerful, no-cost entry into the world of collaborative AI coding.
1Code is listed on FreeAIList because it offers a confirmed open source — meaning the software is open-source and free to self-host. Every tool on this list is manually tested before being published. We verify the free offer actually works, not just what a pricing page claims.
Key Features of 1Code
- Parallel agents for multi-task coding
- Switch between Claude Code and Codex
- Full agent power and plan mode
- Keyboard-first navigation and hotkeys
- Built-in visual Git staging and diffs
- Create pull requests from the UI
- Worktree isolation for clean sessions
- Background agents run when laptop closed
- Live browser previews of dev branches
- MCP protocol for tool integrations
Who Should Use 1Code?
1Code is a good fit if you need agent capabilities and want to start without a financial commitment. The free open source is particularly useful for:
- Individuals and freelancers evaluating ai agent tools before committing to a paid plan.
- Students and researchers who need occasional agent access without a subscription.
- Developers and builders prototyping with ai agent features at no cost.
How to Get the Free Open Source
Getting 1Code's free open source only takes a few minutes. Open 1Code's website then follow these steps:
- 1. Visit the 1Code GitHub repository at github.com/21st-dev/1code.
- 2. Clone or download the source code to your local machine.
- 3. Follow the build instructions for your operating system (macOS, Windows, or Linux).
- 4. Launch the desktop client once installation is complete.
- 5. Sign in with your Anthropic or OpenAI API keys, then start using parallel agents.
Frequently Asked Questions about 1Code
- Is 1Code really free?
- Yes. 1Code provides a genuinely free option: Open source plan: self-hosted local desktop client (macOS, Windows, Linux), full source code access, community support via GitHub. Forever free.. FreeAIList manually confirms every free offer before listing it — no guessing from pricing pages.
- Does 1Code require a credit card for the free tier?
- No. 1Code does not require a credit card to access the free open source. You can sign up and start using it immediately.
- How much free usage does 1Code provide?
- Open source plan: self-hosted local desktop client (macOS, Windows, Linux), full source code access, community support via GitHub. Forever free.
- What can I use 1Code for with the free plan?
- With the free plan, you can Parallel coding with multiple AI agents, visual git integration, and background execution.. This covers the most common use cases without any payment.
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