How it works
The inbox you already know how to use.
You already know how to send a message. Kasten turns that into a superpower for your memory.
The problem
Saving is easy. Finding again is impossible.
You have saved hundreds of things this year. Links in your Instagram DMs. Screenshots in your camera roll. Voice notes you sent yourself. Bookmarks you forgot about. Notes in a notes app you stopped opening.
The problem is never saving. Everyone can save. The problem is finding it three weeks later when you actually need it.
Kasten fixes the finding. Send it once from any chat and it is in a searchable, organized archive. Permanently. Ready the moment you remember you need it.
Send from anywhere
Every app you already use.
Forward a reel, post, or message from DMs.
Send a link or note directly to your Kasten number.
Telegram
Forward any message to the Kasten bot.
SMS
Text anything to your Kasten inbox number.
Forward any email to your personal Kasten address.
Browser extension
Save any page in one click while you browse. Coming soon.
The AI layer
It does the organizing. You do the living.
Over time, Kasten becomes a personal knowledge layer that learns what you care about and helps you find connections you would have missed.
Auto tags
Every item is tagged the moment it arrives. Shopping, Reading, Work, Ideas, and more. You can rename or add your own.
One-line summaries
Long articles and threads get a single sentence description so you know what something is without opening it.
Topic clusters
Kasten groups related items together over time. Your Air Max saves, your apartment inspo, your reading list. All clustered automatically.
Weekly digest
A quiet email on Sunday with the things you saved but never opened. No pressure. Just a gentle reminder.
Privacy
We only ever see what you forward. Nothing else.
Kasten does not read your conversations. It has no access to your contact list. It does not see your camera roll or your other apps. It only receives the specific items you choose to send to your inbox.
This is not a legal disclaimer. It is how the product is built. The architecture makes it structurally impossible for Kasten to access anything beyond what you explicitly forward.
Your data is encrypted at rest. You can delete any item or your entire account at any time. We will never sell your data.
Pricing
Free to start. Always.
Kasten will always have a generous free tier. Power users who want advanced AI features, longer history, and priority support will have a Pro plan available. We will be clear and transparent about what costs what before we charge anything.
No card required to join the waitlist or to use the free tier at launch.
FAQ
Common questions.
Ready to stop losing what you save?
Join the waitlist and be among the first to try Kasten when we open early access.