ChatGPT vs Grammarly
Both cover writing. ChatGPT is the cheaper way in at $8/mo — $4/mo less than Grammarly.
Entry cost
ChatGPT $8/mo
OpenAI's assistant, with the widest model and tool ecosystem.
Free tier: yes · Billing: seat
Plan by plan
| ChatGPT | Price | Grammarly | Price |
|---|---|---|---|
| Free | Free | Free | Free |
| Go | $8 | Pro | $12 |
| Plus | $20 | Enterprise | — |
| Pro | $200 | — | — |
Which to pick
ChatGPT — Generalists who want one assistant that does a bit of everything.
Grammarly — Cleaning up writing across email, docs and browser.
ChatGPT checked 2026-09-04 · Grammarly checked 2026-09-03