Grammarly vs ProWritingAid

Grammarly

• People who write across many apps and want the same checks in each
• Teams of up to 149 that need a shared style guide and brand tone
• Students who want citation, plagiarism and AI-detection checks in one editor

ProWritingAid

• Fiction writers who want feedback on a chapter or a whole manuscript
• Authors who edit in Scrivener, Word or Google Docs
• Writers who would rather buy a lifetime license than subscribe

Grammarly

• The Free plan is capped at 100 AI prompts a month and leaves out full-sentence rewrites and tone adjustments.
• Pro costs $30 per member a month on monthly billing, against $12 a month when billed annually.
• Pro stops at 149 seats; larger organizations need Enterprise, which is priced through sales.
• Advanced grammar, clarity and tone suggestions cover six languages; the other supported languages get spelling and basic grammar only.

ProWritingAid

• The Free plan checks at most 500 words at a time and allows 2 runs of each report per day.
• Manuscript Analysis, Virtual Beta Reader and the other full-story tools need Story Credits, bought separately from a subscription.
• An internet connection is required for the Web Editor and every integration, including the desktop apps.
• Plagiarism checks are sold separately in bundles, and each check covers up to 2,000 words.

Grammarly

Grammar, spelling and tone checks

Corrects spelling and grammar and shows the tone of a message on every plan. Full-sentence rewrites and one-click tone adjustments are part of Pro.

Works inside other apps

Desktop apps for Windows and Mac, extensions for Chrome, Safari, Firefox and Edge, and iPhone, iPad and Android apps bring suggestions into tools such as Gmail, Google Docs, Word and Slack.

Docs and AI agents

Docs is a browser-based document editor with agents including AI Grader, Citation Finder, Reader Reactions, Humanizer and Paraphraser. Some agents are limited to Pro.

Generative AI prompts

Drafts and reworks text from a prompt. The allowance is 100 prompts a month on Free, 2,000 per member on Pro and unlimited on Enterprise.

Plagiarism and AI detection

Scans a document for text that matches other sources and for passages likely to be AI-generated. The plans page lists both checks under Pro.

Team style controls

Pro team accounts get style guides, brand tones, knowledge share, snippets and usage analytics, so a group writes with the same terms and voice.

ProWritingAid

Grammar Checker and Writing Reports

Fixes grammar, spelling, punctuation and consistency issues, and more than 25 reports analyze readability, sentence structure, sticky sentences and word choice.

Rephrase and Sparks

Rephrase offers alternative phrasings for a sentence, and Sparks suggests rewrites in different styles. Free accounts get 10 Rephrases and 3 Sparks a day.

Chapter Critique

Feedback on the pacing, dialogue and prose of a single chapter. Premium includes 1 critique a day and Premium Pro 30 a day.

Full-manuscript analysis

Manuscript Analysis, Plot Analysis, Character Analysis, Virtual Beta Reader and Marketability Analysis each cost 1 Story Credit per run on stories up to 300,000 words.

Planning and writing tools

Story Canvas gives guided prompts on characters, plot, setting and structure before drafting, and Writing Sessions provide a distraction-free writing space.

Works inside other writing apps

Desktop Everywhere for Windows and Mac covers Word, Scrivener and other desktop apps, and Chrome, Edge and Firefox extensions cover Google Docs, Atticus and web pages.

Grammarly

• Free$0

  Spelling and grammar corrections, tone detection and 100 AI prompts a month, for individuals.

• Pro$12

  per member / month, billed annually ($30 billed monthly)

  Full-sentence rewrites, tone adjustments, style guides and brand tones, and 2,000 AI prompts a month. Sold for 1 to 149 seats.

• EnterpriseCustom

  Unlimited members and AI prompts, dedicated support, confidential mode, granular roles and data loss prevention. Sold through Superhuman Go.

ProWritingAid

• Free$0

  Grammar, spelling and punctuation checks on up to 500 words, with 10 Rephrases, 3 Sparks and 2 runs of each report per day.

• Premium$10

  per month, billed yearly ($120); $30 billed monthly

  Unlimited word count, report runs and Rephrases, 25+ writing reports, a custom style guide, 1 Chapter Critique and 5 Sparks a day.

• Premium Pro$12

  per month, billed yearly ($144); $36 billed monthly

  Everything in Premium, plus 30 Chapter Critiques and 50 Sparks a day, live workshops, daily cowriting sprints and a 200+ workshop library.

• Premium (Lifetime)$399

  one-time payment

  The Premium feature set for a single payment instead of a subscription.

• Premium Pro (Lifetime)$699

  one-time payment

  The Premium Pro feature set for a single payment instead of a subscription.

Grammarly

• Annual discount

  Save up to 60% with yearly billing

  Pro is $12 per member a month when billed annually and $30 when billed monthly. The plan toggle advertises a saving of up to 60% on yearly billing.

• Education

  Discounts for educational institutions

  The plans page FAQ says Grammarly offers discounts for educational institutions. Grammarly for Education is quoted through its education sales team.

ProWritingAid

• Annual discount

  Save 67% with yearly billing

  Premium is $10 a month billed yearly ($120) against $30 billed monthly, and Premium Pro is $12 a month ($144) against $36. The pricing page states a 67% saving.

• Lifetime license

  Lifetime licenses from $399

  A one-time payment of $399 buys Premium and $699 buys Premium Pro, each with a 3-day money-back guarantee.

• Education

  20% student discount on annual plans

  Students get 20% off annual subscriptions by verifying through the Student App Centre with an academic email address or other evidence of student status.

• Education

  Free ProWritingAid for Education license

  Primary and secondary school teachers can apply for a free ProWritingAid for Education license for themselves and their students.