Best Grammar Checkers in 2026
Updated
88ranked
11free plans on this page
$0.42/molowest paid tier
9 Oct 2026last checked
Grammar checkers, one module each. A lit port is something its maker publishes; 0 of the 25 on this page have a public API.
- 26 Sentence Checker API not on recordOSS not on recordFREE yesDOCS 6.6Free
- 27 Antidote API not on recordOSS not on recordFREE not on recordDOCS 6.5€4/mo
- 28 Cordial API not on recordOSS not on recordFREE not on recordDOCS 6.5
- 29 CorrectEnglish API not on recordOSS not on recordFREE yesDOCS 6.5$6.67/mo
- 30 Duden-Mentor API not on recordOSS not on recordFREE not on recordDOCS 6.4
- 31 Corrector.app API not on recordOSS not on recordFREE yesDOCS 6.4Free
- 32 CorrectNow API not on recordOSS not on recordFREE yesDOCS 6.4Free
- 33 Korr API not on recordOSS not on recordFREE not on recordDOCS 6.3
- 34 WhiteSmoke API not on recordOSS not on recordFREE not on recordDOCS 6.3$0.42/mo
- 35 AI Grammar Mentor API not on recordOSS not on recordFREE yesDOCS 6.3$6/mo
- 36 GrammarPro API not on recordOSS not on recordFREE yesDOCS 6.3$5/mo
- 37 Lexicon API not on recordOSS not on recordFREE not on recordDOCS 6.2
- 38 Engram API not on recordOSS not on recordFREE yesDOCS 6.2$12.99/mo
- 39 LTeX+ API not on recordOSS not on recordFREE yesDOCS 6.2Free
- 40 TextWarden API not on recordOSS not on recordFREE not on recordDOCS 6.1
- 41 TextRanch API not on recordOSS not on recordFREE not on recordDOCS 6.1$10/mo
- 42 Prose API not on recordOSS not on recordFREE yesDOCS 6.1$10/mo
- 43 WritingTool API not on recordOSS not on recordFREE not on recordDOCS 6.0
- 44 Ghotit API not on recordOSS not on recordFREE not on recordDOCS 6.0
- 45 GrammarLookup API not on recordOSS not on recordFREE not on recordDOCS 5.9
- 46 AlloCorrecteur API not on recordOSS not on recordFREE not on recordDOCS 5.9€9.90/mo
- 47 Wordeep API not on recordOSS not on recordFREE not on recordDOCS 5.9$8.25/mo
- 48 EyeSift API not on recordOSS not on recordFREE yesDOCS 5.9Free
- 49 WProofreader API not on recordOSS not on recordFREE yesDOCS 5.9€34/mo
- 50 Gramma API not on recordOSS not on recordFREE not on recordDOCS 5.8
Compare all 25 in a table
| # | Platform | Score | Free plan | From | Free plan | Paid from | Browser extension | Desktop app |
|---|---|---|---|---|---|---|---|---|
| 26 | Sentence Checker | 6.6 | Free plan | Free | Yes | — | Yes | — |
| 27 | Antidote | 6.5 | No | €4/mo | No | — | Yes | Yes |
| 28 | Cordial | 6.5 | No | — | Yes | — | Yes | Yes |
| 29 | CorrectEnglish | 6.5 | Free plan | $6.67/mo | Yes | — | Yes | — |
| 30 | Duden-Mentor | 6.4 | No | — | Yes | — | Yes | No |
| 31 | Corrector.app | 6.4 | Free plan | Free | Yes | — | — | — |
| 32 | CorrectNow | 6.4 | Free plan | Free | Yes | — | — | — |
| 33 | Korr | 6.3 | No | — | Yes | — | Yes | Yes |
| 34 | WhiteSmoke | 6.3 | No | $0.42/mo | Yes | — | Yes | Yes |
| 35 | AI Grammar Mentor | 6.3 | Free plan | $6/mo | Yes | — | — | — |
| 36 | GrammarPro | 6.3 | Free plan | $5/mo | Yes | — | No | No |
| 37 | Lexicon | 6.2 | No | — | Yes | — | Yes | Yes |
| 38 | Engram | 6.2 | Free plan | $12.99/mo | Yes | — | — | — |
| 39 | LTeX+ | 6.2 | Free plan | Free | — | — | — | — |
| 40 | TextWarden | 6.1 | No | — | Yes | — | Yes | Yes |
| 41 | TextRanch | 6.1 | No | $10/mo | Yes | — | — | — |
| 42 | Prose | 6.1 | Free plan | $10/mo | Yes | — | Yes | No |
| 43 | WritingTool | 6.0 | No | — | Yes | — | — | — |
| 44 | Ghotit | 6.0 | No | — | No | — | No | Yes |
| 45 | GrammarLookup | 5.9 | No | — | Yes | — | — | — |
| 46 | AlloCorrecteur | 5.9 | No | €9.90/mo | Yes | — | — | — |
| 47 | Wordeep | 5.9 | No | $8.25/mo | No | — | Yes | Yes |
| 48 | EyeSift | 5.9 | Free plan | Free | Yes | — | — | — |
| 49 | WProofreader | 5.9 | Free plan | €34/mo | Yes | — | Yes | — |
| 50 | Gramma | 5.8 | No | — | Yes | — | — | — |