An AI essay checker reads your essay and gives feedback on structure, argument, grammar and sometimes a predicted grade, while teacher versions score work against a rubric. Some also flag possible AI writing, which is far less reliable than it sounds. Ten tools follow, in no particular order.
Essay checkers have split into two camps. Student tools give you a score and suggestions before you hand work in, while teacher tools grade a whole class against a rubric and draft feedback that the teacher then reviews and edits.
The ten tools below are listed alphabetically and in no particular order, and each description comes from the provider's own website, read this week. If you only need spelling and grammar, my roundup of grammar checkers covers that narrower job.
AI essay checkers at a glance
I checked the free plan column on each tool's own website or App Store listing, as of Oct 2026. Yes means the page names a free plan, a free tool, a free version or a free tier. Trial only means a time-limited trial. Not stated means the page I read named neither, even where there's a try-free button, so check the provider's own page before you sign up.
| Tool | Type | Good for | Free plan |
|---|---|---|---|
| Brisk Teaching | AI tools for teachers | Batch feedback inside tools teachers already use | Yes |
| CoGrader | AI grader for teachers and students | Exam-style marking, including AP and GCSE | Yes |
| EssayGrader | Rubric-based essay grader | Grading against a large rubric library | Yes |
| Examino | Handwriting-reading essay grader | Marking handwritten essays | Not stated |
| GPTZero | AI detector and writing checker | Showing how an essay was written | Yes |
| GradeLab | Assessment and grading platform | Rubric-aligned grading across assessments | Yes |
| Grammarly | Essay and paper checker | A quick grammar and clarity pass | Yes |
| LumiSource | College essay review tool | Line-by-line edits on a college essay | Not stated |
| Next Admit | College essay grader | A quick score for a college essay | Yes |
| Writing Lab | AI writing and IELTS checker | IELTS essay practice | Not stated |
Ten AI essay checkers worth a look
Brisk Teaching
Best for: Busy classroom staff who want rubric building and batch feedback on student writing inside the tools they already work in.
CoGrader
Best for: Teachers marking to exam standards, with graders for AP, state tests and GCSE, plus a college essay grader for students.
EssayGrader
Best for: Markers who want to grade against their own rubric or pick one from a large library, with feedback on content, style and grammar.
Examino
Best for: Departments with stacks of handwritten work, since it reads handwriting and scores each criterion against your rubric before you approve.
GPTZero
Best for: Students worried about false AI flags, with an AI checker plus a writing replay that shows how a document was built.
GradeLab
Best for: Schools that want rubric-aligned essay grading alongside question paper creation and reporting in one platform.
Grammarly
Best for: Students who want a fast check of grammar, clarity and tone on an essay or paper before they submit it.
LumiSource
Best for: College applicants who want a score and line-by-line editing on a personal statement, against criteria built from admissions guidance.
Next Admit
Best for: High school seniors who'd like an instant score and feedback on a college essay from an admissions consultancy's free grader.
Writing Lab
Best for: IELTS candidates and other English learners who want an essay checker alongside grammar, rewriting and summary tools.
Which checker for which writer
- You're applying to college: LumiSource.
- You're preparing for IELTS: Writing Lab.
- You mark handwritten essays: Examino.
- You teach to AP or GCSE standards: CoGrader.
- You're worried about a false AI flag: GPTZero.
What AI-detection scores can and can't prove
OpenAI's own experience is the clearest warning. It said its AI text classifier correctly identified 26% of AI-written text as likely AI-written, while wrongly labelling human-written text as AI-written 9% of the time, and that it was very unreliable on texts below 1,000 characters. OpenAI withdrew the classifier in 2023 because of its low rate of accuracy.
Want AI doing the heavy lifting in your marketing?
I build the systems that handle the boring 80 percent, so you get your week back. Done properly, with the human kept in.
Detection tools have moved on since then, but the lesson stands: a score is a signal, not proof. If you write your own work, keep your drafts, notes and version history, because they show how the essay came together far better than any percentage.
Writing about the past? Start with history study apps.
Student checkers versus teacher graders
- Student checkers give a quick score and line edits, which helps most on personal statements and timed practice.
- Teacher graders score against a rubric and draft comments, and the better ones make the teacher approve every grade.
- Writing replays show how a document was typed, which can settle an argument about authorship.
Stuck on a different subject? See AI chemistry solvers for problem solving.
How to use a checker without losing your voice
- Write the full draft yourself first, without any AI help.
- Run the checker and note the three biggest points it raises about argument or structure.
- Fix those in your own words, then ignore small style suggestions that don't sound like you.
- Read the final version aloud before you submit it.
Do you make essay feedback, grading or writing tools? Tool makers can ask to be considered for a featured place on this list.
My plain advice on AI essay checkers
Use a checker for feedback on structure and clarity, and treat any grade or AI score as a rough guide. The most useful thing it can do is point at the weakest paragraph, so you can rewrite it yourself.
If you're a teacher, choose a grader that leaves you in control of every mark. And if you're unsure where your school draws the line on AI help, my guide to whether AI writing counts as plagiarism walks through the grey areas.
Frequently asked questions
What is the best AI essay checker?
It depends on the job: college applicants need different feedback from teachers grading a class or learners preparing for IELTS.
Are there free essay checkers?
Yes, several tools here name a free plan or a free grader on their website, so check the free plan column.
Can AI detectors prove an essay was written by AI?
No. OpenAI withdrew its own classifier in 2023 because of its low accuracy, and it had wrongly flagged human writing 9% of the time.
Can teachers use AI to grade essays?
Yes. Several tools here grade against a rubric and draft feedback, and the better ones make the teacher approve each grade.
How do I prove I wrote my essay?
Keep your drafts, notes and version history, or use a tool that records how the document was written.
Is an essay checker the same as a grammar checker?
Not quite. A grammar checker fixes sentences, while an essay checker also looks at argument, structure and how well you answer the question.
