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Trinka

AI grammar checker and writing assistant for academic writing

Free plan · from $48/yrWritingChecked Oct 9, 2026
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Trinka, as pictured on trinka.ai
How Trinka presents itself. Image from trinka.ai.

Trinka report card

3.4GPA

Very good · out of 4.0 · graded Oct 9, 2026

Best for grammar checks on academic papers

Trinka is a grammar checker built for academic and technical writing, and it'll proofread a whole Word or LaTeX file and hand it back with tracked changes. Premium is $48 for the year, which is cheap for this kind of tool. Plagiarism reports are paid for in credits, though, and there's no Mac desktop app or mobile app.

Who Trinka is for

  • Great if you're writing a paper or thesis and want checks that know academic style
  • Handy when English isn't your first language and the text is technical
  • Good for people who must keep drafts out of storage and AI training, on the Confidential Data plan

Who Trinka is not for

  • Pricey if you pay monthly, at $20 a month against $48 for the year
  • Tight if you're staying free, since Basic stops at 5,000 words and 5 AI writing requests a month
  • Skip it if you want a Mac desktop app or a mobile app, as there's neither

Why Trinka gets a 3.4

Five grades, each with its reason. The GPA is their average: an A is 4 points, an F is none.

  • AValue for moneyPremium is $48 a year, shown with $80 crossed out, when a typical writing tool runs about $10 a month. Even the crossed-out price would be cheap. Just don't pay monthly, which is $20, and remember that plagiarism reports cost credits.
  • BFree plan and trialBasic never expires and needs no card, but it's 5,000 words of writing help a month, grammar checks in Lite mode, 5 AI writing requests and 4 free credits. Proofread files come back read-only.
  • AFeaturesGrammar, tone and technical spelling checks that follow the APA, AMA, ACS, AGU and IEEE style guides on paid plans. It proofreads whole Word and LaTeX files with tracked changes, paraphrases, flags retracted references and suggests journals for a manuscript.
  • BEase of useThere's no App Store rating on record, so a B is as high as we go. It works in a web editor, browser extensions and Word add-ins. The credit system takes a minute to learn: a standard plagiarism report is 24 credits, and one credit proofreads 5,000 words.
  • BPlatforms and integrationsA web editor, browser extensions, Word add-ins and a Windows app in beta, working with Word, Outlook, Google Docs, Canvas and Moodle. Enterprise plans have an API. But there's no Mac desktop app and no mobile app.

What these grades rest on. Graded from this listing, whose facts were read from Trinka's own pages on 9 October 2026. Not based on using the product, and shorter than our full reviews. How we review and grade.

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Trinka: 3.4 GPA on ToolGPA

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What is Trinka?

Trinka is a grammar checker and writing assistant aimed at academic and technical writing. Alongside grammar, style and consistency checks it proofreads whole Word and LaTeX files, paraphrases, checks and formats citations, and sells plagiarism and AI-detection reports through a credit system. A separate Confidential Data plan deletes processed text in real time and keeps it out of AI training.

Trinka has a free plan. Paid plans start at $48 per year, billed annually (shown with $80 crossed out). See every plan

Good for

  • 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

Worth knowing

  • 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.

Key features

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.

Trinka pricing

Starts at
$48 per year, billed annually (shown with $80 crossed out)
Free plan
Basic plan: 5,000 words of writing assistance a month, grammar check in Lite mode, the standard paraphraser, 5 AI writing requests and 4 free credits a month. It does not expire and needs no card.
Free trial
7-day free trial offered on the Confidential Data plan
Basic$05,000 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$48per year, billed annually; or $20 per month billed monthlyFull 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$125per year, annual billing onlyAdds 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$300per year, billed annuallyReal-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.
EnterpriseCustomQuoted plans for teams: user management, usage analytics, feature customization, API, SDK and on-premise options, and white labeling.
InstitutionCustomWriting assistance plus the DocuMark academic integrity tool for universities, with LMS and SSO integration. A no-cost pilot can be requested.

Read from trinka.ai on Oct 9, 2026. Prices change, so confirm with Trinka before you buy.

Pricing in detail

Ways to pay less

  • Annual discountSave 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.

    Stated on trinka.ai
  • EducationStudent discounts on request

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

    Stated on trinka.ai

Works with

Trinka alternatives

All Trinka alternatives comparedAll writing tools

Common questions

Is Trinka free?

Trinka has a free plan. Basic plan: 5,000 words of writing assistance a month, grammar check in Lite mode, the standard paraphraser, 5 AI writing requests and 4 free credits a month. It does not expire and needs no card. Paid plans start at $48 per year, billed annually (shown with $80 crossed out).

How much does Trinka cost?

Trinka lists 6 plans. Basic: $0. Premium: $48 per year, billed annually; or $20 per month billed monthly. Premium Plus: $125 per year, annual billing only. Confidential Data: $300 per year, billed annually. Enterprise: custom pricing. Institution: custom pricing. Prices were read from trinka.ai on Oct 9, 2026.

What platforms does Trinka work on?

Trinka is available on Web and Windows. It also has a browser extension.

Does Trinka offer any discounts?

Trinka publicly lists the following: Save 67% with yearly billing; Student discounts on request.

Does Trinka have an Android app?

No Android app was listed when its pages were read on Oct 9, 2026. Trinka is listed for Web and Windows.

Does Trinka have an iPhone app?

No iPhone app was listed when its pages were read on Oct 9, 2026. Trinka is listed for Web and Windows.

Is Trinka open source?

Trinka is not described as open source on its own site, as read on Oct 9, 2026.

Does Trinka have an API?

Yes. Trinka offers a public API, according to its own site.

What does Trinka integrate with?

Trinka's listing names Microsoft Word, Outlook, Google Docs, Evernote, Medium, Authorea, Canvas and Moodle. A listing names up to eight integrations, so it may connect to more.

Does Trinka have a student discount?

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

Does Trinka have a free trial?

Yes. 7-day free trial offered on the Confidential Data plan.

Who makes Trinka?

Trinka is made by Crimson AI.

What are the alternatives to Trinka?

The closest alternatives to Trinka in our directory are Grammarly, Paperpal, Writefull, LanguageTool and ProWritingAid. Each one has a side-by-side comparison with Trinka.

Sources for this page

The prices, plans, platforms and features above were read from these pages on Oct 9, 2026.