Unvent

Unvent is a Chrome extension that rewrites whatever you are typing in any editable text field. The pitch is simple and specific: one keystroke changes the tone of your text without leaving the text box. No copying to a separate tool, no context switching, no new tab.

The in-place rewriting is the key differentiator. Most AI writing tools require you to copy text, paste it into their interface, wait for the rewrite, copy the result, and paste it back. That workflow kills adoption for quick edits. Unvent works where you already are: Gmail, Slack, Jira, Notion, any text field in the browser.

The tone rewriting use case is real. You wrote an angry email and want to soften it. You wrote a casual Slack message and need to make it professional for a client channel. You wrote a technical response and want to simplify it for a non-technical stakeholder. One keystroke, new tone, same text box.

The Chrome extension model means it works everywhere without individual integrations. The target users are professionals who write a lot of communication throughout the day and frequently need to adjust tone. The competition includes Grammarly (which checks grammar but is not focused on tone rewriting) and ChatGPT (which requires copy-paste). Unvent's in-place, one-keystroke approach is the right UX for this specific need. The question is whether the tone options are nuanced enough to be useful or limited to basic categories like formal and casual.