Best free AI writing tools (2026)
Short version: for drafting from scratch, Rytr (10,000 characters a month, 40+ use cases); for checking what you wrote, Grammarly (spelling, grammar, tone and 100 AI prompts); for rewording and summaries, QuillBot (100-word paraphrases, summaries up to 1,200 words).
| Tool | What you get | Limits | Card required | The catch | Source |
|---|---|---|---|---|---|
| Rytr | Write with 40+ use cases in 30+ languages, up to 10,000 characters a month, plus a daily briefing and 25 Engage actions. | 10,000 characters a month; 1 connected source; 25 active relationships; 25 Engage actions a month; 3 person research runs | Vendor doesn't say | 10,000 characters a month runs out fast; unlimited characters start on the $9 Lite plan. | rytr.me/pricing checked 2026-10-20 |
| Grammarly | Spelling and grammar checks, tone detection, 100 AI prompts. | Limited AI prompts | Vendor doesn't say | 100 AI prompt cap. | grammarly.com/plans checked 2026-10-20 |
| QuillBot | Paraphrase up to 100 words in 2 modes (Standard and Fluency), basic grammar fixes, humanize up to 100 words, summaries up to 1,200 words, limited AI Detector and AI chat. | 100-word paraphrase limit; 2 paraphrase modes | Vendor doesn't say | Paraphrasing and humanizing are capped at 100 words; plagiarism checking, custom modes and advanced grammar need Premium. | quillbot.com/premium checked 2026-10-22 |
Every row is taken from the vendor's official pricing page, checked 2026-10-20 to 2026-10-22. "Vendor doesn't say" means the official page does not mention it. Plans change, so confirm on the vendor's site.
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Pros and cons
Con: 10,000 characters a month runs out fast; unlimited starts at $9 Lite
Con: Capped at 100 AI prompts
Con: Paraphrasing and humanizing capped at 100 words; plagiarism check needs Premium
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FAQ
Which free AI writing tool writes the most?
Rytr's free plan allows up to 10,000 characters a month. Grammarly caps AI use at 100 prompts, and QuillBot caps paraphrasing at 100 words at a time.
Do these free writing plans need a credit card?
None of the three pricing pages says either way.
What does QuillBot's free plan leave out?
Plagiarism checking, custom modes and advanced grammar need Premium.
When does Rytr become paid?
Unlimited characters start on the $9 Lite plan.