Communication DNA extends sent mail fingerprint by adding the relationship layer: how you specifically write to each contact. It's why Pranan knows you sound formal to your board and warm to your team without you ever telling it.
How DNA differs from a flat fingerprint
A flat voice fingerprint produces drafts that sound like you on average. Communication DNA produces drafts that sound like you to a specific person. The difference is structural: DNA includes per-relationship patterns, not just personal patterns.
For each contact you've corresponded with, the DNA layer tracks register (formal, warm, direct), frequency (daily, weekly, monthly), turn-taking (do you tend to send long replies or short ones), and topic patterns (do you mostly discuss product with this person, or family, or business strategy).
When you draft a reply to that contact, the system samples from the DNA layer instead of the flat fingerprint. The result is voice that adapts per relationship, automatically.
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