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Desktop App for Mac, Windows (PC)
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Upstream is an AI email client designed to help users manage email faster with drafts that match their voice and tone. It focuses on creating instant email replies that sound like the user, reducing the need to rewrite messages from scratch and helping keep inbox work more organized and efficient.
The app includes features such as voice and tone adaptation, custom prompts for different audiences, and tools aimed at speeding up email workflows. It is built for people and teams that want a more structured approach to email communication, with support for drafting messages that reflect context, intent, and writing style. Upstream is positioned as an email productivity app that combines AI-powered writing assistance with practical inbox management features.
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