Productivity · by Superhuman (Grammarly)
Superhuman
A keyboard-driven email client for Gmail and Outlook with AI drafting in your voice, inbox triage and auto-summaries.
+ Write with AI learns your sent mail and produces replies that sound like you, and Auto Summarize puts a one-line gist atop every thread.
− Expensive for an email client, and it only works on Gmail and Microsoft 365 accounts.
Open Superhuman ↗ best for: high-volume inboxes
Evidence
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+ Deep Research produces long cited reports from dozens of sources, and it reads your Gmail, Drive and Calendar directly when you allow it.
− Quality swings between Flash and Pro models, and it refuses or hedges on some topics more than competitors.
+ Works in nearly every text field on every platform, so corrections and tone suggestions follow you into Gmail, Slack and Word.
− Suggestions can flatten a distinctive voice and the premium nag prompts in the free tier are constant.
+ Works inside the Office apps you already use, drafting Outlook replies, summarizing Teams meetings and turning Word docs into PowerPoint decks.
− Results inside Excel and PowerPoint are often shallow compared with the standalone chat, which makes the $30 business seat hard to justify.
+ Ask questions across your entire mailbox and have the assistant draft replies grounded in past threads.
− Gmail-only, and the bundled-threads inbox model takes getting used to.
+ The real-time score and prospect research panel sit next to the compose box and make cold emails shorter and more specific.
− Scores reward a formulaic short style, and it is sales-specific rather than a general email assistant.