Paperpal vs Trinka

Paperpal

• Researchers preparing manuscripts for journal submission
• Students writing theses and essays who need citation help
• Non-native English speakers polishing academic prose
• Writers who want checks inside Word, Google Docs or Overleaf

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

Paperpal

• The Free plan stops at 200 grammar edits a month and 5 uses a day of the paraphrase, translate and research tools.
• Plagiarism checks have a monthly word cap on every paid plan; going over it means buying a one-time add-on valid for a month.
• The one-time multi-year option exists for Prime only, and the full Journal Fit report needs Pro.
• No desktop or mobile app is listed: it runs on the web, in a Word add-in and in Chrome and Edge extensions.

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.

Paperpal

Grammar and consistency checks

Suggests grammar, tone and consistency fixes tuned to academic writing. The Free plan allows 200 edits a month, Prime 20,000 and Pro has no cap.

Paraphrase, trim and translate

Rewrites sentences in an academic tone, cuts word count and translates text, with translation powered by DeepL in over 30 languages.

Research and citations

Answers questions with cited findings from more than 300 million research articles and formats citations in over 10,000 styles.

Chat with PDFs and a library

Upload papers and ask questions about them: 5 files a month on Free, 150 on Prime and 500 on Pro, with library storage from 300 MB to 10 GB.

Plagiarism and AI detection

Checks similarity against a stated 99 billion sources and flags AI-written text. Plagiarism checks are capped at 10,000 words a month on Prime and 30,000 on Pro.

Submission readiness checks

Runs more than 30 pre-submission checks on language, structure, figures, disclosures and metadata. The full Journal Fit report is limited to Pro.

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.

Paperpal

• Free$0

  200 grammar edits a month, 5 writing and research uses a day, chat with 5 files a month and 300 MB of library storage. No card required.

• Prime$12

  per month, billed annually ($144); $25 billed monthly

  20,000 grammar edits, 10,000 words of plagiarism checks, 25,000 words of AI detection and 500 writing and research uses a month, with 2 GB of storage.

• Pro$29

  per month, billed annually ($348); $59 billed monthly

  Unlimited grammar edits, AI detection and writing tools, 30,000 words of plagiarism checks a month, full Journal Fit reports and 10 GB of storage.

• Enterprise / InstitutionCustom

  Institution-wide pricing with access management and shared libraries, arranged through sales, with a free trial on request.

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.

Paperpal

• Annual discount

  About half off with annual billing

  Prime costs $144 billed annually against $25 a month ($300 over a year), and Pro $348 against $59 a month ($708), a saving of roughly 51 to 52%.

• Other savings

  Prime Multi-year Saver: one payment for 2 or 3 years

  Prime can be bought for 2 years at $229 or 3 years at $289 as a single payment with no auto-renewal. The option is not offered for Pro.

• Education

  Student discount through an institution email

  Paperpal's pricing FAQ offers a discount to students who sign up with an institution email address and recommend that their institution buy a license.

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.