Zuni (YC S24) – AI Copilot for the Browser
Hi HN, I'm Will, and along with my co-founder George, we've built Zuni (https://zuni.app) - a browser extension that adds contextual AI capabilities to your browser. It understands what you're reading and working on, whether that's email, research, or anything else in your tabs. We started out building a full email client with AI built in (you might have seen that version showcased in YC’s AI Design Review - https://www.youtube.com/watch?v=DBhSfROq3wU&t=1601s), but learned that people don't actually want to leave their existing tools - they just want them to work…
Zuni (YC S24) – AI Copilot for the Browser launched on April 17, 2025 with 17 votes, #1,302 of 7,818 launches that month and more than 90% of that year's launches. The site was still online in September 2026, 1 year on.
In plain words
Zuni is a browser extension that adds AI capabilities to existing tools like Gmail and email clients. The extension understands the content users are reading and working with across their tabs, offering contextual assistance without requiring users to switch platforms. It analyzes emails to identify action items and provide suggestions, integrating AI features directly into familiar applications rather than replacing them with new tools.
written from the facts on this page · September 2026
From the sources
AI agents for high-value professional work.
In the maker’s words, at launch
Hi HN, I'm Will, and along with my co-founder George, we've built Zuni (https://zuni.app) - a browser extension that adds contextual AI capabilities to your browser. It understands what you're reading and working on, whether that's email, research, or anything else in your tabs. We started out building a…
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Hi HN! We’re MutableAI (YC W22) (https://mutable.ai). Our mission is to reduce the time and cost to create high quality code using AI. We have worked at the full gamut of companies ranging from startups to big tech and have gotten the sense that many of the rote aspects of software development could be made easier, freeing up precious mental energy. Devs love Copilot, but autocomplete is just one of many ways that AI should make programming easier. We’re taking a more comprehensive approach to developer tooling that bundles Copilot-like autocomplete with documentation, custom AI…
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