ghostbrain quietly haunts every app you use — gmail, slack, notion, linear, calendar — pulls every passing thought into your obsidian vault, and lets you query the whole archive in plain markdown.
open obsidian. drop in the ghostbrain plugin. it appears as a quiet sidebar in your vault — no setup wizard, no account.
auth into gmail, slack, notion, linear, calendar. ghostbrain starts listening. tokens stay in your os keychain.
every message, doc, and meeting becomes plain markdown. query it like you'd query your own brain — only it actually answers.
re: q3 launch — marketing scope
apr 24
#launch · marie
apr 26
q3 launch plan — v3
apr 28
each connector runs locally. tokens are encrypted in your os keychain. you can disconnect any of them in one click and it's gone.
connected
connected
connected
connected
connected
connected
connected
no proprietary database. no lock-in. ghostbrain writes one markdown file per moment, organised the way obsidian already organises everything else.
--- name: marie chen aliases: [marie, m.chen] role: head of marketing last_seen: 2026-05-07 sources: [gmail, slack, calendar] ---
works with you on the q3 launch. tends to ship copy late but always nails the headline.
[[people/sam okafor]] · [[projects/q3-launch]] · [[meetings/may]]
no tiers. no seats. no "upgrade for unlimited". ghostbrain runs on your machine — the meter would be silly.
one brain, one disk, no meter.
download for obsidian4 mb · macos apple silicon · windows + linux soon
your vault is just markdown on your disk. if we ever change our mind, you keep everything that's already in there. that's the whole deal.
none of these answers will change. they're a load-bearing part of the product.
on your machine. ghostbrain writes plain markdown into the obsidian vault you point it at. nothing is sent to our servers unless you explicitly turn on cloud sync, which is opt-in and end-to-end encrypted.
no. the local extraction model runs on your machine. we do not see your data, we cannot see your data, and we structure the company so we never can. the only telemetry is anonymous crash reports.
the canonical store is your obsidian vault, on your disk. ghostbrain is a quiet listener; obsidian is the front-end you already use. you can rip ghostbrain out tomorrow and your notes don't go anywhere.
the indexer is rate-limited and pauses on battery. typical idle cpu is under 1%. the model fits in 1.8gb of memory. you will not hear the fan.
the connector tokens are deleted from your keychain and no further fetches happen. existing notes in your vault stay where they are — they are yours. you can also choose to purge them with one command.
the obsidian plugin is mit-licensed and on github. the local indexer is source-available under a fair-source license — read it, build it, fork it for personal use.
install the obsidian plugin. connect three apps. ask it something you couldn't have remembered yourself. then come back tomorrow and ask again.