ProWritingAid vs Trinka

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

Trinka

• Researchers and students preparing papers, theses and journal submissions
• Non-native English speakers writing academic or technical text
• People who must keep drafts out of storage and AI training

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.

Trinka

• The free Basic plan stops at 5,000 words of writing assistance and 5 AI writing requests a month.
• Premium Plus and Confidential Data are sold on annual billing only; Premium alone has a monthly price.
• Plagiarism reports on Basic and Premium are paid for with credits: 24 for a standard report, 36 for an advanced one.
• Apps listed are a web editor, browser extensions, Word add-ins and a Windows app in beta; there is no Mac desktop app or mobile app.

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.

Trinka

Grammar and style checks

Checks grammar, technical spelling, tone and sentence structure for formal writing. Paid plans add Power mode and corrections that follow the APA, AMA, ACS, AGU and IEEE style guides.

Proofread File

Edits whole Microsoft Word and LaTeX files with formatting kept. Paid plans return an editable file with tracked changes; the Basic plan gives a read-only result. One credit covers 5,000 words.

Paraphraser and AI writing

Rewrites text in several modes and generates or expands drafts on request. Monthly AI requests are capped at 5 on Basic, 25 on Premium and 1,000 on Premium Plus.

Plagiarism and AI detection

Plagiarism reports cost 24 credits (standard) or 36 credits (advanced), and the AI detector 1 credit per 5,000 words. Premium Plus includes 240 pages a year of standard checks.

Citation tools and Journal Finder

A citation checker flags retracted and unverifiable references, a formatter applies major citation styles, and Journal Finder suggests journals for a manuscript.

Confidential Data plan

A separate plan that deletes processed text in real time, does not use it for AI training and includes an offline grammar checker app.

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.

Trinka

• Basic$0

  5,000 words of writing assistance a month, Lite-mode grammar check, 5 AI writing requests, 4 free credits a month and read-only file proofreading.

• Premium$48

  per year, billed annually; or $20 per month billed monthly

  Full writing features, style guides, 25 AI requests and 10 credits a month. The yearly price is shown with $80 crossed out, a 40% discount with no stated end date.

• Premium Plus$125

  per year, annual billing only

  Adds file translation, 1,000 AI requests and 20 credits a month, and 240 pages a year of standard plagiarism or AI-detection checks.

• Confidential Data$300

  per year, billed annually

  Real-time data deletion, no AI training, an offline grammar checker app and 1,000 pages a year of plagiarism or AI checks. Shown with $500 crossed out.

• EnterpriseCustom

  Quoted plans for teams: user management, usage analytics, feature customization, API, SDK and on-premise options, and white labeling.

• InstitutionCustom

  Writing assistance plus the DocuMark academic integrity tool for universities, with LMS and SSO integration. A no-cost pilot can be requested.

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.

• By country

  Lower price shown to buyers in India

  ProWritingAid says prices depend on the visitor's country and shows rupees in India. On 9 October 2026 Premium there was ₹550 a month billed yearly (₹6,600), against $10 a month ($120) in a US copy archived on 5 October.

Trinka

• Annual discount

  Save 67% with yearly billing

  The pricing page labels yearly billing as a 67% saving: Premium is $20 a month when billed monthly, against a regular yearly price of $80.

• Education

  Student discounts on request

  Trinka's pricing FAQ says discounts for PhD students are available by contacting its support team. No rate is published.