Pick ChatGPT if
everyone who wants a hosted general assistant — writing, Q&A, light research, images.
Read the ChatGPT pageChatGPT vs Grammarly
Our take
Pick ChatGPT if everyone who wants a hosted general assistant — writing, Q&A, light research, images. Pick Grammarly if students and knowledge workers who want inline grammar in Gmail, Docs, and the browser. Skip ChatGPT if teams that cannot send prompts to OpenAI, or developers who need a repo-aware IDE (Cursor) or a local runtime (Ollama). Skip Grammarly if people who need a paraphraser with named modes (QuillBot)
Grammarly
signed-out grammar checker plus a writing
Best for
ChatGPT A general-purpose conversation
Grammarly Fix English in the page you already have open
Free plan
ChatGPT $0 · unlimited everyday text chats (abuse guardrails). Limited uploads, images, voice, deep research, memory, Codex, and desktop Work. Confirmed as the free plan on chatgpt.com/pricing copy and Help
Grammarly $0 · uSD / month. Mistake-free writing, tone, 100 AI prompts
Lowest paid
ChatGPT Plus $20/mo, monthly only
Grammarly Pro $12, monthly only
Next step up
ChatGPT Pro $100 / $200 / $500 per month
Grammarly
Coding agent
ChatGPT Codex, rate-limited on Free
Grammarly
Runs where
ChatGPT Local or hosted
Grammarly
Watch out
ChatGPT chatgpt.com/pricing HTML still hides $
Grammarly Free is grammar + 100 prompts
Last checked
ChatGPT 2026-10-19 · help.openai.com
Grammarly 2026-10-20 · support.grammarly.com/hc/en-us/articles
Which one, then?
Pick Grammarly if
students and knowledge workers who want inline grammar in Gmail, Docs, and the browser.
Read the Grammarly page