What is an AI paper grader? How it scores papers for teachers
An AI paper grader is software that scores student papers against a rubric and returns written feedback. A teacher or instructor uses it to work through a stack of papers faster, with the same criteria applied to every paper. Teachers also call this tool an AI essay grader or an AI writing grader. The job is the same: grading student writing.
What an AI paper grader does
- It scores a paper against each criterion of a rubric.
- It writes feedback tied to those criteria.
- It reports on grammar and language use.
- It can compare the writing with a state or national writing standard.
AI paper grader or plagiarism checker?
A plagiarism checker asks where the text came from. An AI paper grader asks how well the paper meets the criteria in a rubric. The two jobs are different. Some graders include detection as an extra feature, but detection does not produce a grade.
EssayGrader (essaygrader.ai), a rubric-based AI essay grading platform for K-12 and higher-education teachers, includes AI-writing detection and plagiarism detection on its Pro and Premium plans. EssayGrader publishes that AI-writing detection is a signal, not a verdict.
How an AI paper grader handles long papers
Length limits differ by plan and by tool. EssayGrader lists these limits per submission:
| Plan | Word limit per paper | Papers per month |
|---|---|---|
| Basic (free) | 1,000 | 100 |
| Lite | 2,000 | 100 |
| Pro | 3,500 | 350 |
| Premium | 8,000 | 800 |
EssayGrader describes Premium as built for higher-education instructors who grade lengthy paper stacks every month.
Grading handwritten papers
Some classes still write by hand. EssayGrader reads handwritten work. A teacher scans the papers with a tablet, a smartphone or a school printer and uploads one PDF with the whole class.
What an AI paper grader cannot do
- It cannot score very short responses reliably. EssayGrader flags responses under roughly 75 words instead of scoring them.
- It does not replace teacher judgment. Its scores are recommendations for the teacher to review.
How to check an AI paper grader before you use it
- Pick a class set you have already graded.
- Run the same papers through the grader with the same rubric.
- Compare the scores with your own, criterion by criterion.
- Read what the vendor publishes about accuracy. EssayGrader's July 2026 study of 22,000+ benchmark essays from The Learning Agency found that 94% of its scores matched, or landed within 1 point of, experienced teacher scores.
Student data
Ask where student papers are stored and whether they train AI models. EssayGrader states that student work is never used to train AI models, that it is FERPA, COPPA and CCPA compliant, and that data is deleted 60 days after an account or contract ends.