What is an engram?
An engram is the working record of how you think: your decisions, your rules and your way of saying things, each one traced to where you said it.
Where the word comes from.
The word was coined in 1904 by the German zoologist Richard Semon for a hypothesised physical trace a memory leaves in the brain. Neuroscience still uses it in that sense: the cells and connections that hold one memory. It is a word for a trace, not for a copy.
How this site uses it.
Here an engram is always yours: "your engram", "Sam's engram". It is a common noun, in lowercase, never a product name. It names the store of nodes built from your own record: decisions, rules, preferences, playbooks and voice, each citing the message, comment or note it came from, with the dates it applies.
It is not you, and it is not a copy of you. It is the part of your record that says what you would do, kept where you can read it, delete it and measure a helper against it. Duplikate builds it, and the helper it powers is measured against you by replaying decisions you already made.
Other uses in AI.
Since early 2026 the word has become a label in the AI field too: a research architecture for conditional memory in large models, at least two companies' memory products, and several open-source projects use it. Those are memory layers for models and organisations. This site uses the older, smaller meaning: a trace of one person's own thinking, owned by that person.
What an engram is not.
Not a clone: it does not imitate your face or voice, and the helper that uses it labels everything it drafts. Not a fine-tuned model: we train no model on you, so every piece can be read, removed and moved. Not a profile someone else built: every node came from your own words, and you chose the sources.
What people ask first.
- Is an engram the same as AI memory?
- No. Memory built into an assistant stores facts about you from your chats with it. An engram stores your decisions, rules and voice, extracted from your own record, each with its source and its dates, and it is measured against you.
- Is an engram a knowledge graph?
- It uses one idea from graphs, that a reversed rule supersedes the old one with a date rather than overwriting it, but it starts as a plain store with valid-from and valid-to columns. A graph database comes later only if it earns its place.
- Can anyone build an engram of me?
- Not here. Duplikate builds an engram only from a person's own record, with that person's written consent, and where a firm keeps an expert's know-how, the expert owns it and can revoke access.
- Why use the word at all?
- Because it is the right word for a trace that is yours rather than a copy that is someone's. We use it carefully: lowercase, possessive, and never as a brand.
- Can I see what my engram holds?
- Yes. Every node is readable, with the source it came from and the dates it applies. Delete one, a whole source or all of it, and the next answer no longer cites what you removed.
See one built.
Want to see what yours would hold?
You'll talk to a senior engineer, not a sales rep, and leave knowing what your engram would be built from and how it would be measured.