Top Grammar & Style Checking AI Tools

AI-powered language learning app focused on real spoken conversation practice.

Speak lets learners practice speaking a new language with an AI conversation partner, giving real-time pronunciation and grammar feedback, aimed at building speaking confidence rather than just vocabulary memorization.

• Real-time AI conversation practice for speaking a new language
• Pronunciation and grammar feedback during practice
• Scenario-based lessons for real-world situations
• Tracks speaking progress over time

AI pronunciation coach for English language learners.

ELSA Speak listens to a learner speaking English and gives detailed, sound-by-sound feedback on pronunciation accuracy, aimed specifically at accent reduction and clearer speech rather than general vocabulary or grammar.

• Sound-by-sound pronunciation accuracy feedback
• Personalized lessons targeting a learner's specific weak sounds
• Accent and clarity scoring for spoken English
• Practice exercises for real workplace and social scenarios

AI-powered writing assistant for grammar, tone, and clarity as you type.

Grammarly checks grammar, spelling, tone, and clarity in real time across browsers, desktop apps, and mobile keyboards, and has expanded into full AI writing assistance (rewrites, prompts) on top of its original correction engine. It's one of the most widely installed writing tools, used inline wherever you already type rather than as a separate app you switch to.

• Free tier includes core grammar/spelling checks, tone detection, and 100 AI prompts/month
• Pro (~$12/mo annual) adds full-sentence rewrites, plagiarism detection, and 2,000 AI prompts/month
• Works inline across Gmail, Google Docs, Slack, LinkedIn, and most text fields via browser extension
• Business/Enterprise tiers add centralized billing, style guides, and brand tone controls for teams
• Desktop app and mobile keyboard extend checking outside the browser

AI video-call tutor for practicing spoken language conversation.

Praktika AI offers video-call style conversation practice with animated AI tutors that give real-time pronunciation and grammar feedback, aimed at building speaking confidence.

• Video-call AI conversation practice
• Real-time pronunciation feedback
• Role-play scenario lessons

Premium AI tier of Duolingo with conversational role-play and detailed explanations.

Duolingo Max adds AI-powered features on top of the standard Duolingo app, including "Roleplay" conversations with an AI character and "Explain My Answer" for a deeper grammar explanation when a learner gets something wrong.

• AI roleplay conversations in the target language
• Detailed grammar explanations for incorrect answers
• Builds on Duolingo's existing gamified lesson structure
• Practice speaking with an AI conversation partner

In-depth writing analysis tool covering grammar, style, and readability.

ProWritingAid is a writing assistant aimed at authors, bloggers, and content creators, offering detailed reports on style, flow, readability, overused words, passive voice, and sentence structure beyond basic grammar checking. It includes genre-specific style guides, a plagiarism checker, and integrations with Google Docs, MS Word, and Scrivener.

• Deep style and readability reports
• Genre-specific style guides for fiction/nonfiction
• Built-in plagiarism checker
• Integrates with Word, Google Docs, Scrivener

AI voice dictation tool that types anywhere on your computer, cleaned up automatically.

Wispr Flow is a voice dictation app that lets you speak instead of type in any app on your computer, using AI to clean up filler words, fix grammar, and format the output automatically as if you'd typed it carefully.

• Works in any app, not just one editor
• Automatically cleans up filler words/grammar
• Fast, low-latency dictation
• Learns your vocabulary over time

AI paraphrasing and grammar tool that rewrites text in multiple tones while checking grammar and citations.

QuillBot is best known for its paraphraser, which rewrites text across modes like Standard, Fluency, Formal, Simple, Creative, Expand, and Shorten while preserving meaning. Alongside that it bundles a grammar checker, plagiarism detector, AI detector, citation generator, and a summarizer/translator, available as a web app plus Word, Chrome, and Google Docs extensions. The free tier caps word counts per action; Premium removes those limits.

• Paraphraser with 7 rewriting modes (Standard, Fluency, Formal, Simple, Creative, Expand, Shorten)
• Grammar checker, AI detector, and plagiarism detector (Premium)
• Citation generator and a summarizer/translator (30+ languages)
• Word, Chrome, and Google Docs extensions
• Free tier limits: 125-word paraphraser, 1,200-word summarizer, 2 modes
• Premium removes word-count limits and unlocks all paraphrasing modes

AI academic writing and language editing tool for research papers.

Paperpal checks academic manuscripts for grammar, clarity, and adherence to journal-specific style guidelines, aimed at researchers preparing a paper for submission to an academic journal.

• Grammar and clarity checks tuned for academic writing
• Checks adherence to specific journal style guidelines
• Suggests more precise academic phrasing
• Works directly inside Microsoft Word