Product · Sounds like you
Not "professional tone". Your rhythm, your vocabulary, your own English — learned from what you've actually published, and defended by a deterministic AI-tell audit.
Voice fingerprint
Zsper drafts against real excerpts of your published writing with measured rhythm and vocabulary — so the result reads like you wrote it on a good day.
Your spellings, your idioms, your currency, your references. No flattening into interchangeable blog-speak, and no borrowed accent laid over the top.
A client workspace learns the client's voice, not yours. Voices never cross-contaminate.
Every piece you publish re-tunes the fingerprint. As your writing sharpens, so does its ear.
Editing · draft
A corner-shop owner two streets away doubled his monthly orders the week he moved billing to a tap-to-pay link. No app download, no onboarding call. The difference wasn’t technology — it was meeting him where hiscustomers already were…
…our partners repay in 11 days against the 45-day industry norm. Trust first, app later.
Built using 2 opinions · 1 customer story · 1 product fact from your brain.
The AI-tell audit
A deterministic detector flags the giveaways — banned phrases, uniform openings, tidy moral-of-the-story closers — then runs one targeted rewrite to remove them.
"In today's fast-paced world", "game-changer", "delve" — caught and cut before you ever see the draft.
Same-shaped openings and summary endings get flagged and varied, so ten posts don't read like one template.
It never invents a stat, name, date, or quote that isn't in your knowledge. If you didn't say it, it doesn't ship.
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FAQ
Five to ten published pieces — blogs, newsletters, or LinkedIn posts — get it genuinely close. Have less? Start anyway: it learns from every piece you publish, and the fingerprint sharpens with each one.
No. It learns YOUR specific English from your own writing. Your spellings, references, and currency stay natural because they're yours — nothing is imposed and nothing is put on.
The patterns readers have learnt to spot: stock phrases, every post opening the same way, tidy summary endings, suspiciously uniform paragraphs. Zsper detects these deterministically and rewrites them out.
Yes — Zsper checks drafts against your fingerprint and shows you where a piece drifts, so you can judge with evidence instead of vibes.
More questions? Visit the Help Center →
Import a few pieces and compare the result against anything generic AI gave you.
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