koii.fish
koii, a line-drawn koi swimming in place

Why koii

Better work. Smaller wake.

koii remembers useful context, routes each task to the lightest model that can finish it, and keeps more work local when possible. Less repeated context. Fewer wasted runs. More finished work.

Try in browserDownload for Mac

local first • cloud when needed • user-approved • context stays close

Watch it work

It just hangs out in the corner.

No window to manage, no tab to feed. koii sits at the edge of your screen while you work. Highlight something and it offers one useful suggestion. When it is not sure, it listens.

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Ask, or drop a file in for me to look at…
1:41 Synthwave▾
31 +

koii reads what you selected, on your Mac, never on a server. It helps draft, research, and organize the next step, while keeping more work local and under your control.

Three surfaces, one pond

Your koii agents go where your work goes.

Koii shares context across Mac, phone, and web, so the same small school of agents can help you draft, research, review, and finish work from wherever you are.

Demo pace

--chat-anim-duration: 10s

  • Draft · Reply to Priya
    koiilocal · on Mac

    Reply drafted from your selection. Ready when you approve.

    Send draftEdit
    selected on screen

    Mac companion

    Lives at the edge of your screen, reads what you select, and helps finish the next step without another tab to manage.

    • Screen-aware
    • Local when possible
    • You approve
  • 9:41
    ☰
    koii 4o⌄
    ✎
    Draft the reply to Priya
    Ready to send when you are.
    +
    MessageDraft the reply to Priya
    🎙↑

    Phone app

    Chat with your agents, review drafts, check progress, and keep work moving when you are away from your desk.

    • Agent chat
    • Approvals
    • On the go
  • koii.fish/pond
    How many fish are in the sea?
    Estimates suggest 3.5 trillion. Let me pull the source…
    How many fish are in the sea?Can you make me a website about the work I’m working on?How many fish are in the sea?

    Web app

    Open your pond in the browser to search memory, manage artifacts, connect tools, and pick up work from anywhere.

    • Shared memory
    • Tool hub
    • Work history

One pond memory sits beneath every surface, so koii does not make you rebuild the same context twice.

Less repeated context. Fewer wasted runs. More finished work from the same pond.

Explore the web app

Your data and content stay with you on every surface, synced through your pond, never sold, never mined.

Powered by the tools you already use

The best models when you need them. Local models when you don’t.

koii connects to the apps and models your work already runs through, then routes each task to the right place. Cloud for heavier lifts. Local for lighter work. One pond underneath it all.

Gmail
Google Calendar
Google Drive
Slack
Notion
Figma
GitHub
Linear
OpenAI
Anthropic
Claude
Gemini
Perplexity
Ollama
Llama
Mistral
Qwen
Gemma
DeepSeek
Phi
Composio
Zapier
Make
+ more under the surface
Gmail
Google Calendar
Google Drive
Slack
Notion
Figma
GitHub
Linear
OpenAI
Anthropic
Claude
Gemini
Perplexity
Ollama
Llama
Mistral
Qwen
Gemma
DeepSeek
Phi
Composio
Zapier
Make
+ more under the surface

A few familiar tools are shown here. There is plenty more under the surface.

The idea

Most context gets thrown away ten seconds after it is made.

You summarize the same tabs. Rewrite the same notes. Paste the same screenshots. Rebuild the same context across every app.

Koii keeps the useful parts close, then turns them into the next polished draft, reply, brief, or fix.

Ambient work settling into the pond

The pond

Work that already exists, ready when you need it.

A quiet tea house at dawn
0.9 Wh · used 412×
Pressed maple leaf specimen
1.1 Wh · used 208×
Espresso cup on a marble sill
1.4 Wh · used 1,240×
Mountain peak at sunset
2.2 Wh · used 89×

Each answer reused instead of regenerated saves time, tokens, energy, and another lap through the copy-paste pond.

Ship this

Paste in the noise. Get one finished artifact back, ready to send.

Pond memory

Useful work settles into your pond. Koii reuses it before asking a model again.

Impact

See watts, water, and credits in plain numbers, local versus cloud.

Opening soon

Pond community

A shared pond where useful artifacts can help the next person who needs them.

Why we started

A quieter use of the machine.

Most AI tools ask you to feed them context. Koii starts from what is already on your screen, runs locally when it can, and only reaches for the cloud when it should.

A single water drop suspended in warm light

Running total, this year

4.7 GWh

energy not spent

8.4 ML

water saved

Why routing matters

  • Right model for the askRead

    A quick rewrite does not need a frontier model. Koii keeps small asks on a local model and only reaches for the cloud when the work truly needs it.

  • Fewer watts per answerRead

    A local reply draws a fraction of the power of a cloud call. Most of your day stays on your Mac, at zero credits and near-zero energy.

  • Kinder to the pondRead

    Less energy burned means less heat, and less water pulled to cool it. Routing well is how Koii keeps the pond clean.

Setup

No terminal. No config files.

Koii sets itself up in six checks. You watch, it works, and nothing is installed that you did not agree to.

See the setup steps
  • Your machine, checked for what it can run
  • A small local model, picked to fit
  • Cloud keys, only if you bring them
  • Your pond, created empty and private
  • Auto-forget window, set by you
  • One first swim, so you see it work

What you get

Big-model quality, quiet-machine cost.

  • 100+ routed models, matched to the ask
  • Local models you can download and toggle
  • Screen-aware drafts, replies, research, and fixes
  • Costs, energy, and water shown in plain numbers
  • You approve the final action every time
You
ask
koii routes
Local · 0 credits
Cloud · hard asks

Koii picks the smallest model that can still nail the answer.

Try the whole pond

Try koii premium for 10 days.

Use the full school of agents across Mac, phone, and web. After the trial, premium routing is $19/month for bigger tasks, updates, and keeping the fish fed.

Start 10-day trial

The small local models stay yours, whether you keep premium or not.