BeyondGrammar allows you to quickly integrate grammar checking, spellchecking and style improvements into the textarea. Suggestions are underlined and you can quickly accept them. As you type, new issues are identified and underlined. Other functionality includes: personal dictionaries, integrated thesaurus, and custom replacements.
It is easy to integrate our real-time grammar checking plugin into textarea. It's free for individual users. For multi-user instances Contact Sales.