Backed byCombinator
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.
Used by teams at
Supported Agents
One app, multiple agents.
Switch between coding agents instantly. Use the right model for each task.
Claude Code
by AnthropicThe original coding agent. Deep reasoning, careful edits, and full codebase understanding.
Codex
by OpenAIOpenAI's cloud-native coding agent. Fast execution, parallel tasks, and broad model support.
Getting started
Three steps to shipping.
01
Connect your agent
Sign in with Anthropic, OpenAI, or bring your own API key.
02
Run agents anywhere
Launch from the desktop app or the web.
03
Ship from the UI
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.
@1code Triggers
Tag @1code in GitHub, Linear, or Slack to start an agent on demand.
Automations
Auto-review PRs, fix CI failures, and complete Linear tasks. All configurable.
Pricing
Simple, transparent pricing.
FAQ
Frequently asked questions.
Ready to ship faster?
Open source. Backed by Y Combinator. Built for developers who ship.
1Code by 21st
support@21st.dev21st.dev is not affiliated with or endorsed by Anthropic or OpenAI.