NudgeLearn Grader vs CoGrader
The most established AI essay grader aimed squarely at K-12. Strong on typed essays against a rubric, with a large preloaded state-rubric set and the compliance paperwork schools ask for.
What CoGrader costs
Starter is free with 100 student submissions a month. Standard is $15/month billed annually ($19 monthly) for 350 submissions. Schools and districts are priced by size.
Verified on 2026-07-25 from CoGrader pricing. NudgeLearn is free for 30 worksheets a month, then $20/month ($15 billed yearly) for 300.
Where CoGrader is the better choice
- A more generous free tier: 100 submissions a month against our 30.
- Cheaper at the paid tier for more volume: $15/month annually for 350 submissions, against our $20/month ($15 annually) for 300.
- SOC 2 Type 1, which we do not have. If your district requires it, that decides it today.
- A much larger installed base and the review history that comes with it.
Where we are the better choice
- Built around typed essay submissions against a rubric. Our grader is built first for work photographed off paper, including handwritten math worked out step by step.
- We mark the student’s own page rather than returning separate feedback, so the student sees corrections where they made the mistake.
- Per-question analytics by student, class, and assignment, rather than per-essay scores.
- One tool for both: worksheets and problem sets alongside rubric-graded essays, instead of an essay tool plus something else for everything else.
The short answer
If your grading load is typed essays and you want the largest free tier, CoGrader is the stronger pick and we will say so. If it is stacks of paper, worked math, lab sheets, short answers in a student’s handwriting, that is the case we are built for and CoGrader is not.
What we are actually built for
Handwritten, multi-step work that has to be read rather than pattern-matched: a page of worked algebra, a lab write-up, a paragraph response, marked directly on the student’s own page, with the per-question record kept by student, class, and assignment.
The grader works each problem out itself rather than matching an answer key, so it needs no key and accepts any equivalent form. Anything it cannot read clearly is flagged for you to confirm rather than guessed, and you can override any result. See how it works.
Test it against your own papers
Run three or four real papers through and check the marks yourself. Free, no card.
Grade something now