Features
What Coeus does, and how.
Plain language. No jargon. Here’s what you actually get.
Ask your notes anything
Find what you captured by asking, not by searching for the right keyword.
You ask a question. Coeus searches your notes and answers from what you actually wrote. Not from training data, not from its best guess. From your own words. "What did I write about that book?" works even if you never tagged the note or put it in the right folder.
Bring your own AI
Connect Claude, ChatGPT, a local model, or any OpenAI-compatible endpoint.
Coeus talks to whatever AI you already pay for. Claude, ChatGPT, Gemini, a local model on your machine. You pick. If you want to switch providers next month, you switch. Nothing in Coeus locks you to one model.
Your files are just files
Notes stay as plain Markdown on your machine. No database, no proprietary format.
Open your notes folder in any text editor. Move it anywhere. Back it up however you want. Most note apps keep your data on their servers. With Coeus, the app is a layer on top of a folder you own. If Coeus disappeared tomorrow, everything is still there, exactly as you left it.
Research capture built in
Paste a URL, a YouTube link, or a PDF. Coeus pulls the content and makes it a note.
Drop a link or upload a file. Coeus fetches the content and creates a note. Article text, video transcripts, PDFs. Research stops living in browser tabs you meant to read later.
Tasks live where your thinking lives
Track tasks in plain text files alongside your notes.
No separate app. When you finish a note about a meeting, the tasks from that meeting are right there in the same file. Coeus reads your task files and tells you what’s due. It’s just text, so any editor can read them too.
Voice capture
Talk to it. Coeus transcribes and saves it as a note.
When you’re driving or walking or away from a keyboard, you can talk. Run transcription locally, or use OpenAI or Groq if cloud transcription is a better fit. The transcript becomes a note.
Capture from Telegram
Send yourself a message. It shows up as a note.
Connect the Telegram bot and you can send notes from your phone without opening the desktop app. Text, voice messages, links. They all land in your notes folder.
Watches your folder
Edit notes in any app. Coeus picks up the changes automatically.
Use Vim, VS Code, Obsidian, Typora. Whatever you prefer. Coeus watches the folder and re-indexes any file you change. You don’t have to be inside Coeus to update your knowledge base.
Free during the beta.
Download now for macOS, Linux, or Windows, or drop your email and I’ll send you updates.