PiGai

Big Data Based Automatic Essay Scoring Service, www.pigai.org Pigai.org, an online automatic essay scoring service, has been widely used by both English learners and educators in China.

It is also widely recognized as a professional product to improve learners' writing proficiency as well as autonomy. Pigai.org can assess each essay within 1.2s averagely, and generate a report including overall scores, comments and also feedback sentence by sentence . Especially due to its intelligent cloud computing ability based on accumulated huge corpus, Pigai.org is able to point out learners' Chinglish and meanwhile recommend the native way of expression. As we all know, writings of TOEFL, GRE and other similar exams are revised by a common system called E-rater, which has already gained international recognition. Comparing with E-rater, Pigai.org has its own striking character that it can be applied to all kinds of exams due to its brilliant machine learning performance based on huge standard language corpus and also unique 192-dimension scoring technology. Until now, pigai.org has served more than 9.5 million users across 4,000 schools and universities in China. It has assessed more than 100 million essays since May 20th, 2015.