A calm, visual client for parallel work.

Claude Code and Codex in one app. Switch agents, take the best of each, ship with the best UI.

Download for Linux Start on Web

Used by teams at

  • Reflection
  • Fluently
  • Vercel
  • Octolens
  • monday.com
  • Draftbit
  • Linux
  • Foundation

Supported Agents

One app, multiple agents.

Switch between coding agents instantly. Use the right model for each task.

Claude Code

by Anthropic

The original coding agent. Deep reasoning, careful edits, and full codebase understanding.

Codex

by OpenAI

OpenAI's cloud-native coding agent. Fast execution, parallel tasks, and broad model support.

Getting started

Three steps to shipping.

  1. Sign in with Anthropic, OpenAI, or bring your own API key.
  2. Launch from the desktop app or the web.
  3. Open PRs, review diffs, and merge - all in one place.

Core features

Ship code, not terminal commands.

Everything you love about coding agents, with a visual interface designed for focused work.

Parallel Agents

Work on multiple features at once. Each agent runs in its own session with full context.

Full Agent Power

Plan mode, skills, message editing, and every feature your agent supports. Nothing held back.

Keyboard-First

Hotkeys for every action. Navigate, create, and manage without touching your mouse.

Git integration

Built-in Git, end to end.

Stage, commit, diff, and open PRs without leaving the app. Git worktree isolation keeps every session clean.

Visual Staging & Diffs

See exactly what changed. Stage files, review diffs, and commit with confidence.

PR Creation

Open pull requests directly from the UI. Add descriptions, reviewers, and labels.

Worktree Isolation

Every agent session runs in its own git worktree. No conflicts, no stashing.

Background agents

Agents that never sleep.

Close your laptop. Your agents keep running in isolated cloud sandboxes with live browser previews.

Runs When You Sleep

Background agents continue working even when your laptop is closed. Pick up where they left off.

Cloud Sandboxes

Every background session runs in an isolated cloud environment. Secure, reproducible, disposable.

Live Browser Previews

See your dev branch running in a real browser. Toggle between desktop and mobile viewports.

Integrations

Connect anything with MCP.

1Code supports the MCP protocol. Plug in any MCP server - community or your own.

  • Notion: Update docs & wikis

  • Linear: Manage tasks & issues

  • GitHub: Issues, PRs & repos

  • Slack: Post updates & alerts

  • Sentry: Read errors & traces

  • PostgreSQL: Query & migrate data

These are just examples. Any MCP-compatible server works.

Automations

Tag @1code in GitHub, Linear, or Slack to start an agent on demand.

Auto-review PRs, fix CI failures, and complete Linear tasks. All configurable.

Pricing

Simple, transparent pricing.

Open Source

$0 Forever free
Self-host it yourself

  • Local desktop client (macOS, Windows, Linux)
  • Full source code access
  • Community support via GitHub

Download for Linux View source on GitHub

Pro

$20 Per month
For individual builders

  • Desktop, web & mobile (PWA)
  • Background agents — keep running when laptop sleeps
  • Start from web or phone, continue locally
  • Live browser previews of dev branches

Max

$100 Per month
For teams & power users

FAQ

Frequently asked questions.

  • What is 1Code?
  • Which coding agents are supported?
  • Is 1Code open source?
  • How does authentication work?
  • How is 1Code different from the CLI?
  • How is 1Code different from Claude Desktop?
  • How is 1Code different from Conductor?
  • What operating systems are supported?
  • Is my code sent to your servers?
  • How do I get help?

Ready to ship faster?

Open source. Backed by Y Combinator. Built for developers who ship.

Download for Linux Start on Web

1Code by 21st

support@21st.dev21st.dev is not affiliated with or endorsed by Anthropic or OpenAI.