Monolithos
The Personal Agent OS. Remembers you. Acts for you. Belongs to you.
Overview
Monolithos is a local-first personal agent for Mac (Apple Silicon), iPhone, iPad and Windows. Its memory is a vault of plain Markdown files on your own disk, so you can open, edit or delete any line in a normal text editor, and the same memory stays when you switch the model underneath. Most of the app is free and runs on your device, including the Markdown editor, database management, the deck editor, the audio player and meeting transcription on local models, where the audio never leaves your device. A subscription is only needed for the cloud AI features, which route model calls through our servers to the model you pick. A cloud copy of the vault is opt-in. Steps that need your judgment pause for your approval, and every action leaves a receipt you can read.
Key features
- Memory stored as plain Markdown in a vault on your disk, compatible with Obsidian vaults
- Free local tools: Markdown editor, database management, deck editor, audio player and more
- Meeting transcription with speaker separation on Mac, iOS and Windows, running on local models that work offline once downloaded
- Cloud AI features (chat, meeting summaries, Prism deck generation, Audio briefs, Deep Research) with premium models such as Gemini, Claude and Grok, keeping the same memory when you switch
- Delegated work stops for your approval at steps that need judgment, and finished work is saved as files you own
- A readable receipt for every action the agent takes
- Conversations become memory only after it asks you
Pricing
Freemium. The local features are free, including the Markdown editor, database management, deck editor, audio player and on-device meeting transcription. Cloud AI features come with a 7-day free trial, no credit card. After that: The Core $39/month or $349/year, The Max $89/month or $859/year, The Founder $999 one-time, limited to 50 seats.
View full pricing on monolithos.ai
Pros & cons
Pros
- Most of the app is free and runs on your own device
- Meeting audio is transcribed on your device and never leaves it
- Your memory is ordinary files you can read, edit, back up and delete
- Memory stays the same when you change models
- Nothing consequential happens without your approval, and every action is logged
- Available on Mac, iPhone, iPad and Windows
Cons
- The AI features (chat, meeting summaries, deck generation, research) run on cloud models and need a subscription after the trial. Running them on local models will open up in later releases, but is not available yet
- No Android app yet
Frequently asked questions
In a folder of Markdown files on your own disk. You can open it in any text editor or in Obsidian.
Most of it. The local features, including the Markdown editor, database management, deck editor, audio player and meeting transcription, are free. A subscription is only needed for the cloud AI features, starting at $39/month, and you can try those free for 7 days without a credit card.
Meeting transcription and speaker separation do, on local models, and the audio never leaves your device. The cloud AI features call cloud models through our servers, and support for running local models will open up step by step in coming releases. Your vault stays on your disk either way, and a cloud copy is opt-in.
The memory lives in your files, not in the model, so it stays the same.
Steps that need your judgment pause for your approval, and each action leaves a receipt you can read.
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