Which email providers and devices does Mocca support?

Mocca works with Gmail, iCloud, Yahoo, and Fastmail over IMAP, and requires macOS on Apple Silicon (M1 or later). Outlook is not yet supported, and Intel Macs and Windows are not supported.

Does Mocca send my email data to any servers?

No. Mocca connects directly to your email provider over IMAP, and there are no Mocca servers, no telemetry, and no account — your email stays on your machine and your provider's servers only.

What can the on-device AI do?

It is a small model running locally that is great at sorting, labeling, and short tasks, but not deep reasoning like GPT-4. You can define rules in plain English, ask questions across your inbox, and chain actions like trash and unsubscribe.

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Mocca: Mac email client with on-device AI for inbox sorting

Hacker News23h ago4 min read

Key takeaway

Mocca is a macOS email client that runs an AI model directly on your machine to sort mail and apply rules written in plain English, without sending any email or data to external servers. The client connects to your existing email account via IMAP and offers privacy-focused inbox management for Apple Silicon Mac users who want AI assistance without cloud processing.

Summaries like this, in your inbox every morning.

3 Key Points

What happened
Mocca is a new macOS email client that runs an AI language model locally on your machine to classify mail, curate your inbox, and apply rules you write in plain English. The app connects over IMAP to your existing email provider and requires macOS on Apple Silicon (M1 or later).
Why it matters
Email never leaves your computer — there are no Mocca servers, no telemetry, and no account required. For users concerned about privacy, this means your inbox stays fully under your control while still getting AI-powered sorting and labeling without sending data to the cloud.
What to watch
The on-device AI is a small model optimized for sorting and labeling rather than deep reasoning; the app supports Gmail, iCloud, Yahoo, and Fastmail over IMAP but does not yet support Outlook. First launch downloads the model (~10 GB) once, and reading already-downloaded mail and the on-device AI work offline.

FAQ

Which email providers and devices does Mocca support?: Mocca works with Gmail, iCloud, Yahoo, and Fastmail over IMAP, and requires macOS on Apple Silicon (M1 or later). Outlook is not yet supported, and Intel Macs and Windows are not supported.
Does Mocca send my email data to any servers?: No. Mocca connects directly to your email provider over IMAP, and there are no Mocca servers, no telemetry, and no account — your email stays on your machine and your provider's servers only.
What can the on-device AI do?: It is a small model running locally that is great at sorting, labeling, and short tasks, but not deep reasoning like GPT-4. You can define rules in plain English, ask questions across your inbox, and chain actions like trash and unsubscribe.

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