Side by side
Not Grammarly vs Sentence Checker
Both stand on grammar checkers. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan LinuxMacWindows
Not Grammarly combines grammar feedback, style refinement, and cross-application clipboard analysis in a free desktop package. Check platform availability and the requirement for your own OpenAI API key before choosing it.
Visit Not Grammarly Free plan ExtensionWeb
Sentence Checker covers a broad set of writing issues and offers a free plan with unlimited checks. Readers should note that checking requires a security question and Premium pricing is unspecified.
Visit Sentence CheckerThe facts
| Not Grammarly | Sentence Checker | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | Linux, Mac, Windows | Extension, Web |
| Lowest paid plan | Free or on request | Free or on request |
| Plans published | 1 | 2 |
| Maker | Not published | Not published |
| Website | not-grammarly.com | sentencechecker.org |
| On grammar checkers | #38 of 88 | #34 of 88 |
Not Grammarly: what it does well
- Grammar corrections include explanations and scoring
- Formal, informal, and concise style options
- Clipboard shortcut works from any application
- Light, dark, and transparent appearance controls
- MIT-licensed desktop project
What to know first
- Requires your own OpenAI API key
- Windows 10/11 version is listed as coming soon
- Linux version is listed as coming soon
- macOS downloads target Apple Silicon chips
Sentence Checker: what it does well
- Free plan states unlimited checks
- Checks grammar, spelling, and punctuation
- Flags several sentence-structure issues
- Available on web and as a browser extension
What to know first
- A security question is required to start checking
Alternatives to Not Grammarly Alternatives to Sentence Checker The whole list