# Trinka

> AI grammar checker and writing assistant for academic writing

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.

- **Category:** Writing Tools
- **Made by:** Crimson AI
- **Website:** https://www.trinka.ai
- **Runs on:** Web, Windows, Browser extension
- **Facts last checked:** Oct 9, 2026

## Pricing

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

- **Pricing model:** Free plan
- **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.

| Plan | Price | What you get |
| --- | --- | --- |
| 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. |
| Enterprise | Custom | Quoted plans for teams: user management, usage analytics, feature customization, API, SDK and on-premise options, and white labeling. |
| Institution | Custom | Writing assistance plus the DocuMark academic integrity tool for universities, with LMS and SSO integration. A no-cost pilot can be requested. |

Read from https://www.trinka.ai/pricing on Oct 9, 2026. Prices change, so confirm with Trinka before buying.

## Ways to pay less

- **Save 67% with yearly billing** (Annual discount): 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. Source: https://www.trinka.ai/pricing
- **Student discounts on request** (Education): Trinka's pricing FAQ says discounts for PhD students are available by contacting its support team. No rate is published. Source: https://www.trinka.ai/pricing

## 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.

## 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.

## Works with

Microsoft Word, Outlook, Google Docs, Evernote, Medium, Authorea, Canvas, Moodle

**Tags:** Grammar & style, AI features, Citations, Public API

## Alternatives

- [Grammarly](https://toolgpa.com/tools/grammarly): Writing assistant for grammar, tone and rewrites in any app. [Compare](https://toolgpa.com/compare/grammarly-vs-trinka)
- [Paperpal](https://toolgpa.com/tools/paperpal): AI writing and checking assistant for academic papers. [Compare](https://toolgpa.com/compare/paperpal-vs-trinka)
- [Writefull](https://toolgpa.com/tools/writefull): Academic language feedback inside Word and Overleaf. [Compare](https://toolgpa.com/compare/trinka-vs-writefull)
- [LanguageTool](https://toolgpa.com/tools/languagetool): Grammar and style checker for more than 30 languages. [Compare](https://toolgpa.com/compare/languagetool-vs-trinka)
- [ProWritingAid](https://toolgpa.com/tools/prowritingaid): Grammar, style and story-critique toolkit for book writers. [Compare](https://toolgpa.com/compare/prowritingaid-vs-trinka)

## Sources

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

- https://www.trinka.ai/pricing
- https://payments-api.trinka.ai/api/v1/payment/get/plans/JTdCJTIydXNlcklkJTIyJTNBJTIyJTIyJTJDJTIycGxhblR5cGUlMjIlM0ElMjJwcmVtaXVtJTIwcGx1cyUyMiUyQyUyMmlzQW5udWFsUGxhbiUyMiUzQTAlMkMlMjJnb190b19wYXltZW50cyUyMiUzQXRydWUlMkMlMjJmcm1rdGclMjIlM0F0cnVlJTdE/1/true/US/false
- https://www.trinka.ai/
- https://www.trinka.ai/features
- https://www.trinka.ai/features/credits
- https://www.trinka.ai/windows-desktop-app
- https://www.trinka.ai/browser-plugin
- https://www.trinka.ai/enterprise/grammar-checker-api
- https://www.trinka.ai/enterprise/confidential-data-plan-for-grammar-checker
- https://www.trinka.ai/aboutus

Page: https://toolgpa.com/tools/trinka
Listed by ToolGPA (toolgpa.com).