Agents side by side
Deploy several Claude Code and Codex agents at once, each in its own pane, each on its own task. Kiln shows which one is working, which is waiting for you, and which is done.
✳refactor auth◇write tests✳needs approval$done
The agent development environment for Mac
Build with agents.
Build it together.
Chat with Claude Code, Codex, Gemini and any CLI agent. Run them side by side, and bring your whole team into one shared space. Kiln picks the right model for every message, so your plan lasts longer.
Free. Uses the plans you already have. No API keys.
How can Kiln help?⌁@✳ Auto↑
Message the team. Mention @claude or @codex to ask an agent.⌁@↑
To do 2
Write release notesBBen
Record the launch video
In progress 2
Checkout redesignCClaude is on it
Polish onboardingAAna
Done 1
Set up payments
Click a card to tick it off
~/storefront main ✓ npm test ✓ 214 passed in 6.1s
Supporting the agents you already use
✳Claude Code◇Codex✦Gemini CLI▲Cursor CLI◎OpenCode◆Qwen Code◬Amp◉Copilot CLI◈Aider❖Goose$Your own CLI
Kiln Teams
Your team and your agents,
in one room.
Every project gets a Team chat, a Board and shared Files. Invite people with a link. @mention a teammate, or any agent, like @claude, @codex or @gemini, and it joins the conversation with the whole thread in view.
Mention anyone, person or agent
Plain messages stay between people. Add @claude, @gemini or any CLI you’ve installed, and it answers in the thread for everyone, tagged with whose plan it ran on.
One board, live for everyone
To do, In progress, Done. Drag cards, tick them off, or hand any task to an agent in one click.
Files the whole project shares
Drop a design, a doc or a screenshot into any chat. It lands in the project’s Files, ready for people and agents alike.
Private when you want it
Chats are shared by default. Double-click one to keep it on your Mac only.
Auto
The right model for every message.
Quick questions go straight to the fastest model. Real work gets a stronger one. Bigger requests are split into tasks that run as separate agents, each on the model its difficulty needs.
1model call
~1sto start answering
Quicktier used
Running low on your 5-hour limit? Auto steps down a tier and tells you, so you don’t hit the wall mid-task.
Kiln Voice
Say it. Don’t type it.
Hold ⌥ Space, talk, let go. Your words land in the chat or the terminal you’re in. Prompts get longer and clearer when they’re spoken, and agents do better with more context.
3.5 hours
saved every week by speaking instead of typing
Most people type around 40 words a minute and speak around 150. A Stanford study found speech input about three times faster than typing on a phone. The calculator assumes a five-day week.
Everything else
Made for a day of real work.
Checkpoints
Kiln saves a checkpoint before every message, so any change an agent makes can be rolled back in one click.
Plan usage, at a glance
See how much of each plan’s 5-hour and weekly limit you’ve used, and when it resets.
✳ Claude◇ Codex
Agents that drive Kiln
Ask for a video and the agent opens the editor. Build a page and it opens the live preview, checks a screenshot, and shows you tables and images right in the chat.
Bring any CLI agent
Claude Code, Codex, Gemini, Cursor, OpenCode, Aider and more. If it runs in a terminal, it runs in Kiln.
Code, preview, changes
A code panel, a live web preview and a git view sit beside the agents, so you can check their work without switching apps.
Kiln is free.
No account, no trial, no subscription. Bring the agents you already use and invite the people you work with.
Download for Mac
Or install from Terminal
curl -fsSL https://kiln-ide.vercel.app/install.sh | sh
Install
Opening Kiln the first time.
Kiln isn’t in the App Store, so macOS asks you to confirm it once. It takes about twenty seconds, and you never see it again.
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1Drag Kiln into Applications
KilnApplicationsOpen the download and drag the Kiln icon onto the Applications folder.
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2Open Kiln, then click Done“Kiln” Not OpenedApple could not verify “Kiln” is free of malware that may harm your Mac or compromise your privacy.DoneMove to Trash
macOS stops Kiln the first time. That’s expected. Click Done, not Move to Trash.
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Privacy & SecuritySecurity“Kiln” was blocked to protect your Mac.Open Anyway3Click Open Anyway
Open System Settings → Privacy & Security, scroll down, click Open Anyway, enter your Mac password, then Open. Done for good.
Prefer the Terminal? The one-line install command puts Kiln in Applications and skips this step entirely.