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Upstream

The inbox that handles itself

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Upstream is an AI email client that works on top of Gmail, organizing messages into splits so users can separate what needs attention from what can wait or be ignored. It drafts replies in the user's own voice and schedules follow-ups, with nothing sent without approval.

Features include AI Drafts, Smart Follow Ups, custom Voice and Tone, Inbox Splits, Ask AI search, and a Granola integration for post-meeting follow-up drafts. Team features cover thread sharing, team comments, shared channels, and channel rules. Productivity tools include multiple inboxes, snooze, send later, undo send, and a command palette. Pro and Max add advanced AI models, configurable prompts, private channels, personal AI agents, and team-wide automations.

Upstream is packaged as a free Core plan with limited weekly AI drafts and follow-ups, up to five team seats, and audience-specific voice settings. Pro and Max are seat-based, billed yearly, with a free trial for Pro and a demo request for Max; Max adds enterprise security, governance, and dedicated support.

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Ranked by how well each tool replaces Upstream: shared features, audience, price and popularity.

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