What is Kepler?

You save pages, videos and posts to Kepler from your browser or your phone. Kepler keeps what’s inside each one, beside your notes, in Spaces you organise and share. When you need it, it’s all in one place: to look back over, to plan or decide from, or to ask about, in Kepler or in the AI you already use.

What does Kepler do?

Save what you find

Save a page, a video or a post when you find it: one click in your browser, or Share, then Kepler, on your phone. Anything with a link can be saved, from a recipe reel to a hotel listing. Kepler adds a summary and tags to each save, so you keep what it said, not only where it was.

Keep it organised

Every save goes into a Space, one for each trip, project or subject. Add a note to say why you kept something, comment on the exact spot on a page, and delete what’s no longer useful, so the Space keeps up with your plans. Kepler doesn’t refresh saved pages by itself: you decide what stays and what goes.

Use what you saved

Open a Space and everything you gathered is together. Group its saves by topic or by site, or search them by what’s inside. Ask Kepler about the Space and it answers from your saves, with a plan, a comparison or a pick. Or ask in ChatGPT or Claude once you’ve connected Kepler. Share the Space, and the people you invite can save, comment and ask in it too.

How does Kepler work?

Kepler is built from two things: saves and Spaces.

A save is anything you kept that has a link: a page, a video, a post, a paper or a listing. Kepler keeps its title, a summary and tags with it, and your notes and the Space’s comments beside it. In your browser, Kepler can also summarise a video or a long page, and keeps the key points with the save.

A Space holds the saves for one trip, project or subject. A new Space is private. Invite someone by email and it becomes shared: they can save into it, add notes and comment. Mention someone with @ and they’re notified, or mention @Kepler and Kepler replies from what you’ve all saved.

Kepler, and any AI you connect, answers from one Space at a time, so a Space for each project keeps the answers on topic. Your saves sync between your browser and your phone.

What is Kepler for?

Most of what you find online ends up somewhere you won’t look again. A recipe stays in a screenshot, a hotel in a group chat, a video in a feed, a source in one of forty tabs. When it’s time to cook, book or decide, it’s scattered, or gone.

Kepler is meant to be the one place those finds go, and where they stay useful: kept with what’s inside them and why they mattered, sorted the way you think about them, and kept current by you as your plans change. Over time a Space becomes your memory of a subject, ready to come back to, to share, or to ask your AI about.

That’s the direction we’re building in. Today Kepler saves from your browser and your phone, keeps your saves in Spaces you can share, and lets you ask about them in Kepler, ChatGPT and Claude. Kepler Explorer, our browser, is the next step: in it, your own AI opens the pages worth reading beside its answer. It’s in preview for macOS, and saving from Explorer to your Spaces is planned.

Does Kepler work with ChatGPT and Claude?

Yes. Add Kepler to ChatGPT from its plugins, or to Claude from its connector directory, and sign in to Kepler once. Then mention @Kepler in a chat: Kepler searches your Space, and your AI answers from the saves it found, with their links.

Any other AI that takes a custom MCP connector can add Kepler with its connector URL, https://app.keplerbrowser.com/mcp. MCP, the Model Context Protocol, is how AI apps connect to other apps.

Kepler isn’t an AI model, and it doesn’t replace the AI you use: it gives your AI what you saved to work from. Your AI can search the Spaces you can open, including Spaces shared with you, and the one thing it can add to Kepler is a saved link, when you ask. Questions you ask through ChatGPT or Claude don’t count towards Kepler’s AI queries, on any plan.

To set it up, connect Kepler to ChatGPT or to Claude, or add it to another AI.

Where does my data go, and who can see it?

Kepler keeps only what you choose to save. It doesn’t track your browsing: a page reaches Kepler when you save it.

• Your saves are kept in your Kepler account, in the cloud, so they sync between your devices. They’re encrypted in transit and at rest.
• A private Space is yours alone. A shared Space is open to the people you invited, and no one else.
• An AI you connect can reach only the Spaces you can open. The saves Kepler finds for a question go into that chat, as part of your conversation with that AI.
• We don’t sell your data, use it for advertising, or use it to train AI models.
• You can delete a save, a note, a Space you own or your account at any time. For a copy of your data, email support@keplerbrowser.com.

In Kepler Explorer, the pages you visit go only to the AI you choose, and Kepler sees only what you save, unless you choose Kepler AI. Our privacy policy has the details.

What does Kepler run on?

The Kepler extension works in Chrome, Firefox, Edge, Opera and Brave, and Safari is coming soon. The Kepler app runs on iPhone, iPad and Android. What you save in one shows up in the other.

Kepler also works inside ChatGPT, Claude and other AI apps that take an MCP connector, so you can use what you saved without opening Kepler.

Kepler Explorer, our browser, is in preview for macOS and in development for Windows and Linux.

Install Kepler on your devices has the link for each one.

What does Kepler cost?

Kepler has three plans: Free, Pro at $12 a month, and Enterprise for organisations, priced on request. On every plan you can save as many links as you like, into as many Spaces as you need, private or shared, and use them in ChatGPT and Claude.

The plans differ mainly in how much Kepler’s own AI does for you each month: its answers in Kepler, and its summaries of videos and long files. Asking from ChatGPT or Claude doesn’t use that allowance, on any plan.

The pricing page lists what each plan includes, and AI queries, plan limits, and cancelling explains the limits.

How is Kepler different from bookmarks?

A bookmark keeps a page’s address and its title. A save in Kepler keeps what the page said as well: its summary and tags, your notes, and comments from the people you share its Space with. You find it by what was in it, not by what you named it, and you can ask about a whole Space at once, in Kepler or in your AI.

How is Kepler different from other tools?

• Read-later and bookmark apps, such as Raindrop.io, keep links for you to find or read again. Kepler is for using what’s in them: planning, comparing and deciding from a Space, on your own or with others.
• Notion and Google Keep are built around what you write: pages, docs, notes and lists. Kepler starts from what you find: you save a link, Kepler adds its summary and tags, and your notes sit beside it.
• Obsidian is a vault of notes you write and link by hand, kept as files on your computer. Kepler starts from the links you save, and syncs between your browser and your phone. Read Kepler vs. Obsidian.
• NotebookLM is a notebook of sources you add and study with Google’s AI. Kepler collects as you browse, and you ask in Kepler or in the AI you already use. Read Kepler vs. NotebookLM.
• ChatGPT’s Computer History records what you do on your Mac once you turn it on. Kepler keeps only what you choose to save. Read ChatGPT Computer History vs. Kepler.
• A project in ChatGPT or Claude holds the files you add, for that one AI. A Kepler Space fills up as you save from your browser and phone, and every AI you connect to Kepler can use it.

Kepler at a glance

	Kepler
What it is	An app for saving what you find online, keeping it organised in Spaces, and using it in Kepler or in ChatGPT and Claude
Made by	Momentium Pty Ltd, Melbourne, Australia
Browser extension	Chrome, Firefox, Edge, Opera and Brave; Safari coming soon
Mobile app	iPhone, iPad and Android
Works with	ChatGPT, Claude and any AI that takes a custom MCP connector
Connector URL	https://app.keplerbrowser.com/mcp
Kepler Explorer	Kepler’s browser: in preview for macOS, in development for Windows and Linux
Plans	Free, Pro ($12 a month) and Enterprise
Your data	Yours: not sold, not used for advertising or to train AI models, and you can delete it at any time
Website	keplerbrowser.com
Support	support@keplerbrowser.com