Audience Fit
Stop guessing if your message resonates
Run your copy against your actual target personas before you publish. Know if your message lands or falls flat for the people who matter.
Paste any marketing text. Get a full 7-module diagnostic in under 60 seconds. No AI rewrites. Just the truth about what's killing your conversions.
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Every module gives you specific, actionable insights. Not generic advice you've heard before.

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A psycholinguistic audit that scores your text on 6 conversion axes and tells you exactly what to fix.
Stop guessing if your message resonates
Run your copy against your actual target personas before you publish. Know if your message lands or falls flat for the people who matter.
See exactly what's killing your conversion rate
Get scored on Emotion, Logic, Credibility, Urgency, Action clarity, and Readability. Know exactly which axis is dragging your conversion rate down.
Test angles designed to convert, not just rephrase
Get three rewritten versions of your text with different persuasion angles. Run A/B tests with options that were designed to convert, not just paraphrased.
Reproduce your best writing on demand
Feed in a sample of your best content. Copyboost extracts your writing fingerprint so you can reproduce it on demand, at any scale.
One text, five formats, zero rewriting
Turn one piece of copy into a LinkedIn post, email, Twitter thread, video script, and more. Stop rewriting from scratch every time.
Sound native in every language
More than translation. Your copy gets adapted so it reads native in the target language, with the right idioms, tone, and cultural references.
Rewrite in your voice, not a robot's
Transform any draft into your own voice. Not the generic AI sound that readers instantly recognize. Yours, with your rhythm and your words.
Any marketing copy works: landing page, email, ad, LinkedIn post, product description. Paste it as-is.
Copyboost runs it through 7 psycholinguistic modules simultaneously. Takes under 60 seconds.
Get your conversion score, axis-by-axis breakdown, and actionable fixes. No fluff, no generic advice.
Start free. Upgrade when you need more.
Good enough to discover what's wrong with one text per day.
For founders and marketers who iterate daily on their copy.
Cancel anytime
For agencies and teams who need full power across multiple clients.
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Need a hands-on expert review of your landing page?
Expert Landing Page Audit · 299€ one-time →Real results from people who ran their copy through Copyboost.
“I pasted our homepage copy and got a complete breakdown in under a minute. Found 3 conversion killers I had no idea were there. Revenue went up 18% the following month.”
Sarah K.
Founder, SaaS startup
“Our A/B tests kept failing and I couldn't figure out why. Copyboost told me exactly which psychological triggers were missing. The winning variant felt obvious in hindsight.”
Marcus T.
Head of Growth, E-commerce
“I write copy for 12 clients and now run every draft through Copyboost before delivery. It's like having a senior conversion strategist review every piece in 47 seconds.”
Elena R.
Marketing Director
A psycholinguistic copy audit analyzes your marketing text through the lens of cognitive science. Instead of checking grammar or tone, it evaluates how your words trigger decision-making processes in your reader's brain. Copyboost scores your text on 6 conversion axes (Hook, Persuasion, Proof and Credibility, Urgency, CTA, and Readability), detects cognitive biases like social proof and anchoring, maps the emotional arc from pain to action, and identifies the persuasion framework your copy follows. The result is a diagnosis that tells you exactly what's blocking conversions, not a rewrite.
Grammarly checks grammar and spelling. Hemingway checks readability. Neither tells you if your copy will convert. Copyboost analyzes persuasion structure, cognitive bias usage, emotional progression, and audience fit. It answers "will this text make someone buy?" not "is this text correct?"
No. Copyboost is built for founders, marketers, and solopreneurs who write their own copy without a copywriting background. The diagnostic explains what to fix and why in plain language, with concrete suggestions.
No. Copyboost diagnoses problems and suggests specific fixes, but it never auto-rewrites your text. You keep full control. The Rewrite module lets you transform drafts in your own voice, not a generic AI tone.
Landing pages, email campaigns, LinkedIn posts, ads, product descriptions, sales pages, and any marketing text. You paste the text as-is, select the content type, and Copyboost adapts the analysis.
Yes. The free plan gives you 1 full analysis per day across all 7 modules. No credit card required. No time limit.
Every day your conversion killers stay hidden costs you signups. One analysis changes that.
Diagnose my textFree plan · No credit card · Results in under 60s