Writing assistant for grammar, spelling, tone, revision, and generative help across apps and websites.
Official sources reviewed Oct 4, 2026 · Some details not confirmed
What the free plan includes
Core correctness and tone help plus 100 generative AI prompts each month.
Plan type
Ongoing free plan
Free allowance
Core correctness and tone help plus 100 generative AI prompts each month.
Download on free
Not applicable
Watermark on free
Not applicable
Commercial use on free
Not confirmed
Credit card required
No
Paid plan
Pro: $12 per member monthly when billed $144 annually, or $30 month-to-month; includes 2,000 monthly AI prompts.
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The limitation that matters
Advanced rewrites, tone adjustment, brand tools, and plagiarism detection require Pro; output reuse rights are not stated for Free.
The 100-prompt allowance applies to on-demand generative AI. Free also provides mistake correction and tone detection without a published numeric correction quota. Grammarly's newer AI Chat has a separate daily limit in supported desktop experiences.
Plan details can change. A source check confirms published information; it is not a hands-on quality review or a guarantee that the plan fits every project.
Check the original sources
These are the provider pages used for this record. An unconfirmed field means we could not establish a clear answer from the reviewed information.
Research-backed AI-text detector for documents, web pages and images, with a browser extension, Google Docs integration and API.
Ongoing free plan
Free plan scans up to 2,000 words per day plus 3 image-detection scans daily, with file upload/OCR, a browser extension and Google Docs integration; no payment method needed.
↳Checking whether text was AI-generated
Keep in mindThe free tier is capped at 2,000 words a day. No AI detector is perfect: treat a result as a signal to review, not proof.