Supafax

building @supafax_ (YC W26)

Supafax is an AI agent that lives inside your inbox and proactively manages your email and calendar without waiting to be prompted. It is an AI agent that lives in your inbox and proactively manages your email and calendar. In a typical workday, it triages overnight messages before you open your inbox, drafts informed replies to the threads that matter, finds meeting times across calendars and time zones when CC'd like an executive assistant, and keeps tabs on recurring tasks and slipping deadlines in the background. It is aimed at founders, operators, and anyone whose morning starts by digging out from under a backlog of email. The launch is notable because most assistants still ask people to learn an interface or write a prompt to get anything done. Supafax runs on top of the email client users already have, with no separate app, dashboard, or shortcut system to adopt, which is a deliberate response to the fact that most workers outside of tech do not think in terms of agents or chat windows. The team is exiting beta this week alongside a Product Hunt push, with a free month offered to early users. Supafax was founded in 2025 by Rohan Mahendraker and Anton Muratov, and has 2 employees based in San Francisco. It is part of Y Combinator's Winter 2026 batch. Rohan is a self-taught software engineer who built and sold compliance software to Fortune 500s, and was previously a founding engineer at CoLoop (YC S21), where he built their eval suite and AI agent. Anton has a go-to-market background, having closed enterprise deals with large banks and global fashion groups and advised YC startups and later-stage companies on GTM strategy.

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