AI Grading Tools for Teachers: 7 Compared

Which AI marking tool suits your subject, your phase and your data protection rules? Each pick shows who it is for, what it costs to try and where it falls short.

By Dan Fitzpatrick, teacher, AI education specialist and bestselling author. Last updated . 138 tools and 499 educator reviews in the directory.

Short answer: for most teachers the best AI grading tool depends on the subject. Graded Pro and Marking.ai suit mixed subjects and have a free way in. DeepMark and GradeIt AI target GCSE-style and English marking. AIR covers primary writing, EnlightenAI covers rubric-based writing feedback and Gradescope suits paper-based assessment. Pick tools where a teacher approves every mark.

How we chose: all seven are listed in the AI Educator Tools directory and each has a public product page, which we read on 14 October 2026 to check what it does, whether a free plan exists and whether a teacher reviews marks before pupils see them. Privacy answers are declared by each company on its listing and are not a legal certification.

One rule applies to every tool here. The Department for Education's guidance on generative AI says teachers must use professional judgement and that any content produced needs checking for accuracy. It also recommends that personal data is not used in generative AI tools unless strictly necessary. Mark a few scripts yourself first and compare.

What this guide can and cannot tell you

Use this directory to build a shortlist, not as a compliance decision. Tool details and policies change, and your institution remains responsible for its own legal, safeguarding, procurement and accessibility checks.

  • Editorial picks are selected by AI Educator Tools. Star ratings and written reviews are separate contributions from signed-in community members; we moderate submissions but do not claim that every reviewer’s professional identity has been independently verified.
  • GDPR, COPPA and FERPA labels report what a vendor declares. A 9ine badge means a separate 9ine assessment has been completed; neither label is a legal guarantee that a tool or a particular deployment is compliant.
  • Counts on this page are live counts of public listings and reviews in this directory. They are not estimates of the total number of products, users or reviews in the wider education technology market.
  • Paid tiers and featured positions are labelled. Commercial arrangements do not change community ratings, remove critical reviews or determine the editorial picks on this guide.

Official privacy and data-protection guidance

Check the rules and guidance that apply in your jurisdiction and ask your institution's responsible staff before processing student data.

The seven AI grading tools

Ordered by how easily a teacher can try them. Each shows who it suits and its main limitation. Prices and free plans were checked on each vendor's own site on 14 October 2026 and can change.

  1. 1. Graded Pro

    Best for: Mixed-subject marking, including maths, science and economics, with a free plan

    Marks classwork, homework, tests and exams against your rubric or mark scheme and reads handwritten and typed work. The vendor's free Teacher plan includes 150 starter credits plus up to 50 free credits a month, and teachers can preview and edit feedback before it is returned. The listing declares UK hosting and GDPR, FERPA and COPPA compliance, and 4 educators rate it 5.0 on this site. Main limitation: marking uses credits (a basic task is about 3, full exam marking about 30), so heavy use needs a paid plan.

    Assessment and Grading · Freemium · 5.0/5 from 4 educator reviews · Declared: GDPR, COPPA, FERPA

  2. 2. Marking.ai

    Best for: UK-style marking across many subjects, from primary to sixth form

    Marks typed and handwritten work against the mark scheme you upload, quotes the words behind each mark and drafts feedback. The vendor says nothing reaches a pupil until a teacher approves it. New accounts get 20 free submissions without a payment card. The listing declares EU hosting and GDPR compliance. Main limitation: the free allowance is a one-off 20 submissions, not a monthly one, so ongoing use needs a paid plan.

    Assessment and Grading · Freemium · Declared: GDPR

  3. 3. DeepMark

    Best for: Secondary departments that need to mark and moderate to one standard

    Built for GCSE-style exam marking: scan or photograph scripts, mark against AQA, Edexcel, OCR or WJEC schemes and share scripts so a team can agree marks. The vendor states that a teacher must confirm every mark and that AI is optional. A free trial of 20 papers is offered. Main limitation: pricing is not shown on the product page and the listing names English, history, religious studies, business and economics. Staff only, 18 and over.

    Assessment and Grading · Paid · 5.0/5 from 1 educator review · Declared: GDPR

  4. 4. GradeitAI

    Best for: English Literature and Language essay marking against exam-board criteria

    Marks essays against your mark scheme, scores each assessment objective and links each mark to a quote from the pupil's answer, for typed or handwritten work. The vendor says you review and adjust grades before they go out. The listing declares EU hosting and GDPR, FERPA and COPPA compliance. Main limitation: English only, and the vendor's own pages show different prices, so confirm the current price before you buy.

    Assessment and Grading · Contact for pricing · Declared: GDPR, COPPA, FERPA

  5. 5. EnlightenAI

    Best for: Rubric-based writing feedback across subjects, with an independent privacy assessment

    You set the rubric and calibrate the AI on sample work, then it proposes scores and comments for you to review. The vendor says it works with Google Classroom, Canvas and Clever. The listing declares UK hosting and GDPR, FERPA and COPPA compliance, and it has an independent 9ine privacy and security assessment. Main limitation: the vendor's page does not state pricing or a free plan, so ask before relying on the freemium label on the listing.

    Assessment and Grading · Freemium · Declared: GDPR, COPPA, FERPA · 9ine security assessed

  6. 6. AIR

    Best for: Primary school writing assessment in the UK

    Upload photos of pupils' writing from a phone, tablet or computer and get assessment information, actionable feedback and a class overview. Educators rate it 4.92 from 12 reviews on this site, and the listing declares UK hosting and GDPR compliance. Main limitation: it is for primary writing only, and the vendor does not publish prices, so you book a demo to find out the cost.

    Assessment and Grading · Paid · 4.9/5 from 12 educator reviews · Declared: GDPR

  7. 7. Gradescope

    Best for: Paper-based tests, bubble sheets and code in higher education or STEM-heavy classes

    Digitises scanned paper assessments and offers rubric-based grading with per-question analytics. The vendor says Gradescope is free for instructors to sign up, and that AI-assisted Answer Groups sit in its Institutional licence. The listing carries an independent 9ine assessment. Main limitation: the AI grading features need an institutional licence, so an individual teacher on the free plan will not get them.

    Assessment and Grading · Paid · 9ine security assessed

How to compare AI grading tools

Start with what you mark. A tool built for English essays will not help a maths department, and a primary writing tool will not mark GCSE scripts. Then look at three things in order: whether a teacher approves every mark, how pupil data is handled and what it costs after the free allowance runs out.

  • Teacher in the loop: choose tools where marks and comments are drafts until you approve them. Most of the tools here say so on their own pages.
  • Data protection: check hosting location, whether the company says it collects pupil data and whether you can ask for deletion. These come from company declarations on each listing.
  • Cost after the trial: free allowances differ. Graded Pro gives monthly credits, Marking.ai gives a one-off 20 submissions and DeepMark offers a 20-paper trial.
  • Fit with your mark scheme: tools that let you upload your own scheme or rubric are easier to keep consistent with how your department marks.

Is AI marking reliable enough to use?

AI marking is best treated as a first draft from a fast assistant, not a final grade. The Department for Education's guidance says generative AI cannot replace the judgement and deep subject knowledge of a human expert, and that the professional remains responsible for the final content.

A practical test: mark five or six scripts yourself, run the same scripts through the tool, and compare the marks and the reasons given. If the tool cannot explain its mark with evidence from the pupil's work, do not use it for anything that counts.

What should I do about pupil names and personal data?

The DfE guidance recommends that personal data is not used in generative AI tools, and that anything you enter should not identify an individual unless it is strictly necessary and your setting can protect it. In practice, use pupil codes rather than names where the tool allows, check the vendor's privacy policy and agree it with your data protection lead before a whole-class rollout.

The Index shows how many listed tools declare GDPR, FERPA and COPPA compliance, where they host data and how many have not said. A blank answer is a reason to ask the vendor, not to assume.

Want a how-to rather than a comparison?

Our companion blog covers how teachers actually use these tools to cut marking time, with worked examples. This page is the directory view: which tools exist, what they cost to try and what each one declares about privacy.

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Frequently asked questions about ai grading tools

What is the best AI grading tool for teachers?

It depends on the subject and phase. Graded Pro and Marking.ai suit mixed subjects and have free ways in, DeepMark and GradeIt AI target GCSE-style and English marking, AIR covers primary writing and Gradescope suits paper-based assessment. Try two on the same scripts before choosing.

Are there free AI grading tools for teachers?

Yes, with limits. Graded Pro's free Teacher plan includes 150 starter credits and up to 50 free credits a month. Marking.ai gives new accounts 20 free submissions. DeepMark offers a 20-paper trial. Gradescope is free for instructors, but its AI-assisted grading needs an institutional licence. Checked on vendor sites on 14 October 2026.

Can AI grade essays accurately?

It can produce a useful first draft with evidence quoted from the pupil's work, but accuracy varies by tool, subject and mark scheme. The Department for Education says teachers must apply professional judgement and check AI output. Compare a sample of marks against your own before relying on it.

Is it safe to upload pupil work to an AI grader?

Check each vendor's privacy policy and where it hosts data. The Department for Education recommends that personal data is not used in generative AI tools unless strictly necessary and protected. Companies declare their compliance on their listings, which is not a legal certification, so ask for data protection documents.

Do AI marking tools replace teachers?

No. The tools here are built so a teacher reviews and approves marks and feedback before pupils see them. They reduce the repetitive part of marking and leave the professional judgement with you.

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