A privacy-first email client for macOS, with AI that runs on your terms.
By submitting, you agree to our privacy policy.
Summaries, smart replies, priority sorting - they're everywhere now. But you're stuck with whatever AI your email client bundled in. You can't swap it. You can't configure it. You can't make it work the way you actually need it to.
AI is getting better every month. New tools, new capabilities. But your inbox doesn't let you use any of it. You get what they ship, when they ship it.
The best setup is one you can actually configure for how you work. That's Mbox.
Your email stays on your machine. That's not a limitation. It's what makes these features possible.
Long email chains summarised in two sentences. Know what happened without reading 40 replies.
AI sorts your inbox on your machine: urgent, FYI, newsletters, receipts. No rules to write, no data uploaded.
Know when an email needs a careful reply before you even open it. Tone is analyzed locally and never stored anywhere else.
Deadlines buried in the body of an email get pulled out and flagged. You'll see them before you forget them.
Built native for macOS, not wrapped in Electron. When everything runs locally, speed isn't optional.
Because your data never leaves, the AI learns you specifically. Not a million other users. Your priorities, your writing style, your patterns.
Connect your existing OpenAI, Google Gemini, or Anthropic account. Fast to set up, familiar models. Your API key means your data goes to your vendor, not ours.
Choose your model, configure what you like. Everything runs on your machine. No internet required for AI. No data leaves your hands. Ever.
This isn't a line in a terms of service. It's the architecture. Mbox is the client - you pick the AI, and your email never touches our servers. We don't want it.
By submitting, you agree to our privacy policy.