Your notes arrange themselves by what they mean.
Flip the graph from links to meaning: every note finds its place by semantic similarity — computed locally from embeddings, deterministic, no cloud. Clusters reveal what you think about. The empty space between them reveals what you haven't connected yet.
An AI that interrogates your beliefs.
Open any claim you hold and run a structured investigation against your own notes: evidence for and against, hidden assumptions, and the strongest counterargument your corpus can construct. Every citation traces to a note. You write the verdict — Aethr never does.
Answers from your notes — or an honest "they don't say."
Ask questions answered only from your own writing, with citations. Find the gaps your notes avoid. Audit your beliefs for blind spots and contradictions. No hallucinated confidence: when your notes are silent, Aethr says so.
Tools that organize notes are everywhere.
This one helps you think.
What we refuse to compromise
Your files are the truth
Plain markdown in a folder you own. The database is a rebuildable index. Leave anytime — everything comes with you.
AI never writes your notes
It questions, retrieves, maps, and challenges. Your beliefs, your conclusions, your words — always yours.
Local-first, forever
Works offline. Bring your own AI key, choose your own models. No accounts, no lock-in, no telemetry.
Aethr is in private alpha.
macOS, invite-only, free while in alpha. Leave your email and we'll send invites in small batches — thoughtful software deserves thoughtful rollout.
macOS 14+ · bring your own AI key · open source soon