Grammar checker & sentence vs Spelling & grammar check
Two Productivity & writing APIs with a free plan, compared field by field.
| Grammar checker & sentence corrector — 100+ languages | Spelling & grammar check, summariser and text compare | |
|---|---|---|
| Endpoints | 1 | 1 |
| Latency | — | — |
| Service level | — | — |
| Free tier | $0.00 | $0.00 |
| Paid from | $9.99 | $9.99 |
| Updated | 2025-10-09 | 2025-11-26 |
Grammar checker & sentence corrector — 100+ languages
The API corrects grammar and sentence structure in over 100 languages and returns the fixed text rather than a list of complaints.
Writing tools, CMS platforms and language products use it as the correction layer for user-generated text.
Open Grammar checker & sentence corrector — 100+ languages →
Spelling & grammar check, summariser and text compare
Three writing tools behind one API: spelling and grammar correction, summarisation of long documents, and a comparison that highlights what changed between two versions and how similar they are.
Editors, CMS platforms and document tools use it without wiring three separate services.
Open Spelling & grammar check, summariser and text compare →