Grammarly capabilities

Two related but distinct features: (1) AI Detector analyses finished text to identify content written or modified by AI models (ChatGPT, Claude, Gemini), returning a percentage score. (2) Authorship proactively tracks the writing process in real time, categorising text as typed, pasted from browser, pasted from desktop apps, or AI-generated, producing a colour-coded report and writing-replay.

Suggests and applies sentence- and paragraph-level rewrites to make writing clearer, more concise, and better structured. Full-sentence and full-paragraph rewrites are offered as one-click accept suggestions.

Prompt-driven generative AI (formerly GrammarlyGO, now marketed as Grammarly AI / Go) that drafts content from scratch, rewrites existing text for tone or length, summarises long email threads, generates outlines, and provides conversational AI chat assistance. Includes specialised AI agents: Paraphraser, Proofreader, AI Humanizer, Reader Reactions, Resume Builder, Citation Finder, and AI Grader. Available via Grammarly Docs (web editor) and the 'Go' context-aware overlay across external apps.

Real-time detection and correction of grammatical mistakes, spelling errors, punctuation issues, and contextually confused words (e.g. 'less' vs 'fewer') as the user types.

Scans documents against a database of 16+ billion web pages and ProQuest academic papers to identify unintentional similarities, flagging matching passages with source references and an originality score. Includes citation suggestions in APA, MLA, and Chicago formats.

Three-tier web plan structure (Free, Pro, Enterprise) plus a legacy Premium tier (App Store/Google Play only) governing AI prompt allowances, advanced writing features, team collaboration tools, and enterprise security controls.

Grammarly works inline across browsers (extension), native desktop, mobile keyboards, and deep integrations with MS Office and Google Docs. The Superhuman Go overlay extends assistance across 1 million+ apps without switching tabs.

Lets organisations upload or define custom writing style rules and brand tone profiles; Grammarly then enforces these org-wide, delivering real-time on-brand suggestions to every team member as they write. Complemented by Snippets (reusable message templates) and Knowledge Share (surfaces company jargon definitions inline).

Detects the tone of writing in real time (e.g. formal, friendly, confident, direct, diplomatic) and — on Pro+ — offers one-click tone adjustments to shift the message from one register to another.