Discover ThinkOS
One place to run your work with AI agents.
ThinkOS gives every area of your work a home and an agent to look after it. Agents remember what matters, use the tools you connect, and check with you before they act. It all runs on your computer first, with any model you choose.
For Mac, Windows, and Linux
The tour
Spheres, agents, and the rules they follow.
Most AI tools give you a chat box that starts from scratch every time. ThinkOS gives your agents a place to work, with the context, tools, and boundaries they need to carry work forward.
New to Think Agents? Meet them first →Spheres · Chief Think Agent
A home for every part of your work
A Sphere is an area you’re responsible for: a company, a client, a project, your household. Nest them the way you actually work. Each Sphere can have its own agent. Your Chief Think Agent, the first agent you meet, looks after anything without one and can set up new Spheres and their agents for you.
Spheres
What’s on my plate for Acme this week?
Three things: the board meeting Thursday, Sam’s contract renewal, and the pricing page review. I’ve drafted notes for the board meeting.
Activity · Approvals
Agents with real jobs and clear limits
Each agent has its own identity, accounts, tools, and approval rules. Work you ask them to track shows up as Tasks in Activity, so you can see what’s running, what’s done, and what needs you. Anything important waits for your OK.
Chief Think Agent
LaunchLaunchWork Memory
Memory you can open
Work Memory lives on your computer as plain Markdown, readable in any editor and easy to back up. Every memory records where it came from. Private memories save as you work, and by default, changes to shared memory wait for your review.
Hiring plan
Two engineers in Q4, one designer in Q1. Budget approved at the September board meeting.
Source · Gmail thread with Sam, Sep 12Channels
People and agents, side by side
Invite teammates into a shared Sphere. People and agents work in the same channels, agents join in when you mention them, and every message shows who wrote it. Shared history is end-to-end encrypted, and your private conversations stay private.
Where it’s heading: channels are growing into a shared feed where you can follow the work of the people and agents around you.
@Launch where did signups land this week?
1,284 signups, up 18% on last week. Most came from the pricing page. The breakdown is in Content.
Nice. Let’s review it at standup.
Models · Tools
Any model, your accounts, your tools
Sign in with the ChatGPT or Claude subscription you already pay for, add an API key, or run models locally. Connect the apps you work in; credentials are protected by your system’s secure storage and never pass through chat.
Models
ChatGPT
Claude
Gemini
Grok
Cursor
OpenCode
Local modelsTools
Gmail
Calendar
Drive
Sheets
Slack
Linear
Telegram
Discord
MCPSecurity and control
Powerful agents, with you in control.
Agents are only useful if you can trust what they do. Privacy isn’t a setting in ThinkOS; it’s how the whole thing is built, and it keeps you in the loop without making you babysit.
End-to-end encrypted
Sync and shared Spheres are encrypted on your devices, so our servers only store their contents in encrypted form.
Approval levels you set
New conversations start on Ask for approval: agents ask before using the internet, editing files, or controlling apps. Switch a conversation to Approve for me (with guardrails) or Full access, or give a Sphere its own default.
Connected to your real work
Connect email, calendar, and docs, plus the APIs, command-line tools, and websites your agents need. Credentials are protected by your system’s secure storage and never pass through chat, and you can revoke access at any time.
Everything on the record
ThinkOS keeps an audit log of what your agents do, and anything waiting on you shows up in Activity.
Your data, your call
Usage analytics are opt-in and never include your content. Revoke a device or remove a Sphere whenever you need to.
With you wherever you work
ThinkOS runs on Mac, Windows, and Linux computers. Your computer is home base for your memory and agents, and the iPhone and iPad app connects to it so you can keep working from anywhere. Android is in early testing.
Questions
Product questions
Product
What is ThinkOS?
ThinkOS is an app for working with AI agents. You organize your work into Spheres, like a company, a client, or a project, and agents take on the work in each one. Your Chief Think Agent is the first agent you meet, and each Sphere can have a dedicated agent with its own accounts, tools, and approval rules.
What is a Chief Think Agent?
It's the first Think Agent you meet when you set up ThinkOS. It introduces itself, takes on whatever you hand it, and looks after anything that doesn't have an agent of its own. Hand it something ongoing and it can set up a Sphere with a dedicated agent for it. You can rename it or change its look by clicking its avatar.
What devices does ThinkOS work on?
ThinkOS runs on Mac, Windows, and Linux computers. The iPhone and iPad app is in public beta, and Android is in early testing. Your computer is home base: it keeps your memory and runs your agents, and your phone or tablet connects to it so you can keep working from anywhere. There's no browser version yet.
Who is ThinkOS for?
People and small teams who want AI to carry real work, not just answer questions. You don't need the command line or prompt engineering to get started. Technical users can go further with local models, their own provider accounts, and the bundled CLI.
What problem is ThinkOS solving?
AI tools are powerful, but most of them start from zero every time. Your context is scattered across chats, files, apps, and people, and nothing carries the work forward. ThinkOS gives agents lasting memory, real tools, and clear boundaries, so they can follow work through instead of answering one prompt at a time.
What do you mean by agentic workflows?
Repeatable jobs that agents carry forward for you: researching, drafting, following up, tracking, and checking. In ThinkOS you can watch every step, and anything that changes your records or acts on your behalf follows the approval rules you set.
Is ThinkOS only for developers?
No. You put agents to work by talking to them, and ThinkOS handles the setup around them. Developers get extra depth, including local models, their own provider accounts, and a CLI that lets other agents and tools operate ThinkOS.
How does ThinkOS use context?
Each Sphere keeps its own conversations, content, and memory, and agents work from the context of the Spheres they cover. Your Work Memory is stored on your computer as plain Markdown, with a record of where each memory came from. Private conversations stay private unless you choose to share them.
Why call it an AI operating system?
Because it's where you run your agents: who they are, what they work on, what they remember, which tools they can use, and when they need your approval. ThinkOS manages that layer so you can focus on the work.
How is ThinkOS different from existing AI tools?
Most AI tools keep your memory, workflows, and agent setup locked inside their own product. ThinkOS keeps them on your computer and works with the models you choose, so your agents and everything they've learned stay yours.
Is ThinkOS model-agnostic?
Yes. Run local models through Ollama, sign in with your Claude, ChatGPT, Gemini, Grok, or Cursor account, or add an OpenAI, Claude, or Venice API key. You can switch models without rebuilding your setup.
What will paid plans add?
ThinkOS is free to download and use on your computer. Paid plans add capacity and collaboration, such as more encrypted cloud sync and shared Spheres for teams.
Try ThinkOS free on your own computer.
For Mac, Windows, and Linux