The fingerprint captures sentence length distribution, lexical choices, signoffs, response patterns, and tone shifts per recipient. It is not the email content itself but a structured representation of the writing style. Pranan generates drafts by sampling from this fingerprint plus the incoming thread context.
What's actually captured
The fingerprint isn't your email content. It's a structured representation of your writing style. We track sentence length distribution: do you write long or short sentences, and in what mix? Vocabulary frequency: which words you reach for and which you avoid. Signoffs: do you use 'best,' 'thanks,' or 'cheers' and in what proportion? Timing patterns: do you reply within an hour or wait until the next day?
The original email content stays in Gmail. We pull patterns and store them in your isolated user profile. This matters for privacy: a malicious actor with access to the fingerprint database couldn't reconstruct your emails.
The fingerprint also gets sharper over time. Every email you send adds another data point. By month two of use, drafts feel like muscle memory.
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See sent mail fingerprint in action. 300 drafts a month free.