In any 30-day period, you can check up to 300 documents or 150,000 words. In any 24-hour period, you can check up to 100 documents or 50,000 words. (If you are an Enterprise Subscriber, this restriction applies to each of your Authorized Users.)
You can check up to 60 pages (100,000 characters including spaces) at a time when you use the Grammarly Editor at www.grammarly.com. There is no page limitation if you use Grammarly for Microsoft Word and Outlook.
You can upload a document of 4 MB or less. Supported document types are MS Word (.doc, .docx), OpenOffice (.odt), .txt and .rtf.
Premium membership allows access to Grammarly on up to five different computers.