Premium tier
Tephra — a memory brain that grows itself
Most AI memory is a box you fill by hand: siloed inside one app, and blank again the moment a chat ends. Tephra is the opposite — a private, encrypted knowledge brain that pulls in and files new memories on its own, learns from every interaction, and is read and written by every AI you work with, so nothing you work out is ever explained twice. It compounds on its own and gets sharper the more it is used. Tephra is part of Premium.
What it does
- A brain that grows itself. It pulls in and files its own new memories every day and learns from every interaction, so it keeps getting sharper without being hand-fed.
- One memory across every AI. Claude, Onyx, and your local model all read and write the same brain, so a decision made once is known everywhere from then on — nothing is re-explained.
- Private and encrypted. An encrypted knowledge layer you control, with a private side. It is a tool for keeping and connecting what you know, not a source of advice.
How to get on the list
Leave an email on this page and we will tell you when access opens. See membership and pricing for the tier that includes it.
Frequently asked questions
What is Tephra?
Tephra is a self-growing memory brain — a private, encrypted knowledge layer that pulls in its own new memories every day, learns from every interaction, and is shared by every AI you use. Instead of re-explaining yourself to each tool, you build one memory that all of them read and write. It is a tool for keeping and connecting what you know, not a source of advice.
What makes Tephra different from other AI memory?
Most AI memory is a box you fill by hand that is siloed inside one app and blank again the moment a chat ends. Tephra fills itself, learns per user, keeps a private side, and is shared across every AI you use — so a decision made once is known everywhere from then on and nothing is re-explained.
Which tier includes Tephra?
Tephra is part of the Premium tier. Premium is $29/mo direct from the website, or $19/mo at the member rate through the Obsidian Metrics community.
Does Tephra give investment advice?
No. Tephra is an educational tool for keeping and connecting what you know. It does not provide personalized investment advice, and no result is promised. We are not financial advisors.