RedPen vs Trinka
RedPen
redpen.ccTrinka
trinka.aiSide by side
| Figure | RedPen | Trinka |
|---|---|---|
| Price from | — | $6.67/mo |
| Free plan | — | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | — | Yes |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | — |
| API | — | Yes |
| Self-hosted | — | Yes |
| Plans published | 0 | 7 |
| Spec score · Writing Style Checkers | 7.0 (#27) | 8.5 (#7) |
| Integrations | The project lists integrations or packages for Atom, Emacs, Vim, WordPress, IntelliJ IDEA, Sublime Text, and Visual Studio Code. | The browser plugin supports writing in Google Docs, Authorea, Evernote, and Medium. |
| Languages | The maker says RedPen works with documents in languages including English, German, Japanese, and Chinese. | Trinka Cloud provides English grammar checking and Spanish grammar checking with automatic language detection. |
| Platforms | The project README lists macOS, Windows, and Linux as supported platforms. | The site lists browser extensions for Chrome, Firefox, and Edge, a Windows app, Microsoft Word add-ins for Windows and Mac, and enterprise API, SDK, and on-premise options. |
| Purpose | RedPen is a proofreading tool for writers and programmers who write technical documents or manuals that must follow a writing standard. | Trinka is an AI grammar correction and language enhancement assistant designed for academic and technical writing. |
| Support | The project lists documentation, a mailing list, and English and Japanese chat rooms for support. | The pricing page directs users seeking assistance to Trinka Support at [email protected]. |
Plans
Trinka
- Premium$20 a month
- Premium$80 a year
- Confidential Data$300 a year
- BasicFree
- Confidential Data$300 a year
- PremiumPrice not published
- Premium PlusPrice not published
In their own words
Trinka
Trinka is an AI grammar correction and language enhancement assistant for academic and technical writing. It checks grammar, suggests paraphrases, reviews consistency and can proofread uploaded MS Word documents for download. Other tools include AI-assisted writing, citation features, plagiarism checks and a journal finder. Trinka Cloud checks English and Spanish grammar and detects the language automatically. Its browser plugin supports writing in Google Docs, Authorea, Evernote and Medium; listed platform options also include web, API, desktop and self-hosted access. Institution plans list LMS and SSO integrations such as Canvas, Moodle, Blackboard and D2L. The free Basic plan does not expire, but monthly usage limits apply. Premium costs $20 a month, billed monthly, and includes up to 120 proofread files per year and 25 AI writing requests per month. Confidential Data costs $300 a year with annual billing. Trinka says user data is encrypted in transit and at rest. Its Trust Center says paid-plan data is not used to train AI models and Confidential Data Plan data is deleted after processing.