Teachers can grade one assignment (up to 99 essays) in EssayTagger for free. The idea is that you'll be able to try the site out and grade a real-world assignment for all of your class sections.
Your account will have all features fully-functional and you can use it for however long you like. But after you grade 99 essays your account will become limited.
If you require a larger free trial allotment, contact us at firstname.lastname@example.org and we will consider your request.