MarketBrief Quill

MarketBrief Quill helps you write better. It will not humanize your writing, rewrite, paraphrase, fix sentences, or write for you — because society advances when intelligence is reinforced and not skipped. Quill shows you what is strong, what is weak, and what to ask yourself about your own text. You do the revising.

Writing Quality is a rule-based estimate of observable sentence, organization, specificity, and mechanics patterns. It does not assess coherence, meaning, argument, evidence, or audience fit. Voice — Human Texture is a separate style signal; neither score identifies authorship.

When you press Check, your text is sent to MarketBrief’s self-hosted LanguageTool service for grammar and style signals. MarketBrief does not store Quill text unless you choose to save a check. No hosted AI service or third-party grammar API is used, and your writing is never used to train anything.