1Code
An open-source client for coding agents from the 21st team. 1Code wraps Claude Code and Codex in a Cursor-like visual UI with diff previews, real-time tool execution, a Kanban board for agent sessions, Git worktree isolation and cloud sandboxes for background agents. Bring your own API keys; runs on Mac and the web.
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Our take
An open-source client for coding agents from the 21st team. 1Code wraps Claude Code and Codex in a Cursor-like visual UI with diff previews, real-time tool execution, a Kanban board for sessions, Git worktree isolation and cloud sandboxes for background agents. Bring your own keys; runs on Mac and web. Calmer than the terminal for parallel work.
Best for
Developers running multiple coding agents who want diffs, previews and PRs in one visual place.
Pros
- Open-source, bring-your-own API keys
- Visual UI for Claude Code and Codex
- Worktree isolation and cloud sandboxes
- Kanban view of parallel agent sessions
Cons
- New project, evolving fast
- Assumes you already use coding agents
- Mac and web only
How it compares
Where terminal agents leave parallel work, diffs and previews scattered, 1Code pulls them into one Cursor-like surface, and unlike Cursor it's open-source and harness-agnostic.
Full review
1Code is an open-source coding-agent client from the team behind 21st.dev. It gives terminal agents like Claude Code and Codex a calm, Cursor-like visual interface - diff previews, real-time tool execution, a built-in Git client with visual staging, a file viewer and an integrated terminal - all in one app.
Each chat can run in its own isolated Git worktree, with cloud sandboxes for background agents and live browser previews, and a Kanban board to visualize agent sessions so you can work on several features at once. It supports custom models and providers with your own API keys, runs on Mac and the web, and the source is public on GitHub.
Cloudkart Trust Graph
4.0/5- Actual Utility4/5
Source: Initial LLM-authored rubric (backfill)
- Ease of Use4/5
Source: Initial LLM-authored rubric (backfill)
- Pricing Fairness5/5
Source: Initial LLM-authored rubric (backfill)
- Reliability3/5
Source: Initial LLM-authored rubric (backfill)
- Differentiation4/5
Source: Initial LLM-authored rubric (backfill)
Scored as of . Each score is versioned and auditable; vendors cannot buy it.
How this score is set
- Editorial rubric
- Primary signal — five dimensions, 4.0/5 average.
- Community reviews
- None yet.
- Pricing verified
- Not yet verified
- Independence
- Score set by our editorial team before any affiliate relationship is considered. No vendor can buy it.
Frequently asked questions
- Is 1Code free, and how much does it cost?
- 1Code is open source and free to self-host.
- Who is 1Code best for?
- Developers running multiple coding agents who want diffs, previews and PRs in one visual place.
- How is 1Code rated on Cloudkart.ai?
- 1Code scores 4.0 out of 5 on the Cloudkart.ai rubric, which weighs actual utility, ease of use, pricing fairness, reliability and differentiation. Scores are set editorially and can never be bought.
Community reviews
No community reviews yet. Be the first to share how 1Code works for you.
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Compare 1Code head-to-head: vs Composio · vs LiteLLM · vs Claude Code · vs Kiro