Frequently asked questions

Copyboost does not generate copy for you: it diagnoses why your current copy isn't converting.

AI writing tools like ChatGPT, Jasper, or Copy.ai produce content from your instructions. They replace the writing phase. Copyboost audits the diagnostic phase, the 80% of work that happens before you write: audience psychology, persuasion structure, emotional mechanics.

Concrete example: you've written a landing page. ChatGPT can rewrite a different version. Copyboost tells you exactly why your current version is losing conversions: is it the hook (first 3 lines), missing urgency, a weak CTA, or a misapplied framework?

The result: you understand your own copy, you keep your voice, and you fix what's actually blocking conversions, not what an algorithm guesses might be better. Try it free at /audit-gratuit, no credit card required.

Paste your marketing copy into the Analysis module, product description, landing page, email, LinkedIn post, or any other format. Our AI evaluates it in under a minute across 6 psycholinguistic axes: the hook (first 3 seconds), persuasion (cognitive biases used), social proof (credibility signals), urgency (motivation to act now), CTA (clarity and strength), and readability (density and flow).

The output: an overall score out of 10, a detailed rating on each axis, cognitive biases detected or missing, and an improved version of your text incorporating priority fixes.

No generic rewrites: the diagnosis is based on your specific text, your existing arguments, and your context. You get an expert verdict, not AI-generated filler. All of this without creating an account, try it now at /audit-gratuit.

The Free plan gives you 1 full analysis per day on the Diagnose your text module, no account or credit card required. It's enough to test the tool on your existing copy and get a first conversion diagnosis.

The Pro plan (€39/month, cancel anytime) unlocks 50 analyses per day across all 7 method modules:

• ›Diagnose your text: conversion scoring on 6 axes
• ›Test on your audience: simulation of audience profiles
• ›Generate variants: 3 alternative versions of your text
• ›Capture your voice: analyze your style to reproduce it
• ›Repurpose your text: LinkedIn, Email, Thread X, Video script
• ›Translate and adapt: translation + cultural adaptation
• ›Rewrite your way: transform a draft into your voice

Commercial use of generated content is included in the Pro plan.

Yes, the Pro subscription has no minimum commitment. You can cancel at any time from your Account page by clicking 'Manage my subscription'. This opens your Stripe customer portal directly, where you confirm the cancellation in two clicks, no support ticket, no retention form.

Once cancelled, your Pro access remains active until the end of the already-paid period. Example: you cancel on the 15th of the month, your access continues through the last day of that month. No partial refunds are applied automatically, but no additional renewal is charged.

If you simply want a break, cancelling and reactivating your subscription incurs no additional fees. Your analysis history is not deleted.

For any billing questions, email support@copyboost.io and we'll respond within 24 business hours.

No. Copyboost does not store the texts you submit for analysis. Here's precisely what happens: when you paste your copy, it's transmitted in real time to AI services (language models) for processing. Once the response is received, the source text is not retained in our database or application logs.

This design choice is deliberate: it simplifies our GDPR compliance and ensures that your confidential copy: unpublished product descriptions, strategic emails, pre-launch ad copy, or client work, cannot be exposed, indexed, or reused.

Your Copyboost account stores only your email address, subscription status, and daily analysis quota. No marketing content is associated with your profile.

For any questions about our data practices, see our full privacy policy at /confidentialite.

Yes. Copyboost works fully in English, both for the interface and the analyses. To switch languages, use the selector in the top right of the page, the change is instant and persists across all your sessions.

You can submit English-language texts and receive a diagnosis entirely in English: axis scores, feedback per dimension, identified cognitive biases, and an optimized version will all be returned in English.

The tool is particularly well-suited for English marketing copy: Amazon product listings, Facebook and Google ads, SaaS landing pages, B2B emails, and newsletter copy. The underlying psycholinguistic analysis framework is language-agnostic: the 6 axes (Clarity, Emotion, Urgency, Credibility, CTA, Uniqueness) apply equally to English and French.

Try it directly from /audit-gratuit by pasting an English text into the analysis field.

The Capture your voice module analyzes and reproduces your unique communication style, what professional copywriters call your 'brand voice'.

Here's how to use it: paste a representative example of your existing content (an email that performed well, a LinkedIn post that drove engagement, a sales page you wrote). Ideally 200–500 words, enough for the AI to identify recurring patterns.

The analysis detects your register (formal, conversational, expert), sentence rhythm (short and punchy vs developed and argumentative), characteristic syntactic constructions, industry vocabulary, and recurring formulas.

Result: you get a map of your style, and the module can then rewrite any other text while adopting exactly that imprint, useful for maintaining brand consistency at scale, onboarding new writers, or delegating copywriting without losing your voice.

Yes. The Pro plan includes full commercial use: you can analyze texts for your own business or on behalf of your clients, and use the diagnostics and optimized content in a professional or commercial context.

Typical use cases: a freelance copywriter who audits client copy before delivery, a marketing director who evaluates team copy, an e-commerce consultant who optimizes product listings for a client store, or an agency that integrates Copyboost diagnostics into their service offering.

One restriction applies: reselling access to the tool itself is prohibited. You cannot create a Pro account and share it with multiple clients as a resold subscription service. Each user must have their own access.

If your agency needs multiple Pro accounts, contact us at support@copyboost.io to discuss team pricing options.

Several ways to reach us: via the /contact page (form), or directly by email at support@copyboost.io. We respond within 24 business hours, Monday through Friday.

For frequently asked questions about billing and subscription, you'll find answers in this FAQ or directly in your Stripe portal (accessible via Account → Manage my subscription).

For technical issues (bug, unresponsive module, analysis error), include in your message: the type of text submitted (product description, email, landing page...), the module used, and if possible a screenshot of the result or error. This helps us diagnose and resolve the issue much faster.

For Expert Audit inquiries (€97 service with video diagnostic and validation call), visit /audit-expert or email support@copyboost.io directly, mentioning your industry and the URL of your page.