Writefull is an AI English writing assistant that provides support for writing, rewriting, revising, and editing, and can check grammar, word choice, and sentence structure to help users improve text quality and accuracy of expression.

Grammarly is an AI writing assistant that uses advanced artificial intelligence technology to help users detect and correct grammar, spelling, punctuation, and style issues in English writing, making it suitable for students, professionals, writers, and other groups.

Paperpal is an AI English writing tool for academic writing that integrates core functions such as language editing, text rewriting and generation, and pre-submission checks. Built on AI technology trained on millions of published academic articles, it provides real-time, discipline-specific language suggestions. Paperpal understands academic context and offers precise language correction suggestions while preserving the originality of references, equations, technical terms, and non-English words. It also provides comprehensive features such as academic translation, plagiarism checking, AI writing assistance, and synonym suggestions. It is suitable for students, researchers, and publishers, and has earned the trust of 500,000+ academic users from 125 countries.