Zero

TL;DR: Zero is an open source AI-native email client that organizes your inbox, summarizes threads, writes replies, and lets you chat with your email, so you can stay effortlessly on top of work.

What is Zero and how does it work?

Zero makes email work for you, not the other way around (checkout our launch video below!).

Launch Video

Zero uses AI to:

• Prioritize emails and surface what matters most
• Summarize long email threads into quick takeaways
• Draft and Reply to emails automatically
• Organize your inbox into smart categories, let you chat with your inbox, understand projects, and plan your day.

Problem
Traditional email clients are outdated and passive. They overload you with notifications, bury important messages, and force you to manually manage threads, tasks, and follow-ups. Meanwhile, most “AI” email tools are just bolt-on features, slow, clunky, and unaware of the full context of your inbox.

Our Solution
Zero is built from the ground up as an AI-native email platform. That means every part of your experience, from prioritization to replies, is powered by a deep understanding of your inbox and your workflow. Zero doesn’t just help you handle email, it helps you get ahead of it.

• AI that thinks like a human assistant, not a search algorithm
• Real-time summaries and smart organization that adapts to your day
• A seamless way to interact with your email through natural conversation
• Fully open source for complete transparency

Try Zero

Instead of drowning in an endless stream of emails, Zero gives you a live, intelligent inbox you can actually control.

We just launched our public beta at 0.email.

If you’d like to chat with us or learn more:

📅 Book a meeting: https://cal.com/team/0/chat

📧 Email us: founders@0.email