GradeOrbit vs MarkIt
Per-page maths marking against per-script pricing, at real script lengths.
Prices and information about MarkIt checked 25 October 2026
In short
MarkIt is cheaper for short maths papers. At the 20-page median paper it quotes, the two cost about the same, and a 40-page mock costs less on GradeOrbit, which charges per script and marks every subject.
About MarkIt
MarkIt is a UK AI marking tool for secondary maths departments. You upload handwritten or digital scripts with an AQA, Edexcel or OCR scheme, or your own, and it charges by the page.
What one script costs
One student’s script at four lengths, from a short quiz to a long mock booklet.
| Tool | 2 pages | 6 pages | 24 pages | 40 pages |
|---|---|---|---|---|
| GradeOrbit | 13.9p–16.7p | 13.9p–16.7p | 13.9p–16.7p | 13.9p–16.7p |
| MarkIt | 1.6p–2p | 4.8p–6p | 19.2p–24p | 32p–40p |
GradeOrbit
Individual plans from £5 to £25 a month, for 30 to 180 credits. 1 credit marks one student’s script, whatever its length. Schools pay £10 per teacher a month, billed annually, with unlimited marking and AI detection on every seat.
1 credit per script costs 13.9p–16.7p on a monthly plan used in full, or 20p if you go over your allowance. School seats have no per-script charge.
MarkIt
10 papers (200 pages) free every month, then one-off packs: £5.99 for 600 pages or £24.99 for 3,000. Paid pages never expire. School and trust prices are not yet published.
From 0.8p a page (the £24.99 pack) to 1p a page (the £5.99 pack), with the pack used in full. MarkIt counts a page as one side of one student’s response.
Published accuracy
Studies differ in subject, exam board, sample size and who ran them, so read the figures side by side rather than as a ranking.
GradeOrbit
- GCSE Maths (Pearson Edexcel): 96% of marks within 1 mark of the senior examiner, agreement score (QWK) 0.92, across 69 marks.
- GCSE English (Eduqas): 83% of marks within 1 mark of the senior examiner, agreement score (QWK) 0.96, across 98 marks.
Measured 18 October 2026 on exam board exemplar scripts. We ran the study ourselves; the method and limits are on our accuracy page.
MarkIt
MarkIt says 98.6% of question marks fall within 1 mark of the teacher’s, on an internal teacher-marked GCSE and A-level maths benchmark dated June 2026. It does not give the sample size or exam boards.
Side by side
| GradeOrbit | MarkIt | |
|---|---|---|
| How you pay | Yes: Per script: 1 credit, any length | Partly: Per page, prepaid packs |
| Pages per script | Yes: Up to 50 on individual accounts; no limit for schools | Not found: No page limit stated; quotes a 20-page median paper |
| Subjects | Yes: Any subject, KS3 to A-level and BTEC | Partly: Maths only, GCSE and A-level |
| Handwritten scripts | Yes: Scanned or photographed whole scripts | Yes: Handwritten and digital scripts |
| Mark schemes | Yes: Ready-made GCSE mark schemes, or your own criteria | Yes: AQA, Edexcel, OCR or your own scheme |
| Published accuracy figures | Yes: Against senior examiners, GCSE Maths and GCSE English | Partly: Internal benchmark; no sample size given |
| AI detection | Yes: 1 credit a check on individual plans; unlimited for schools | Not found: Not mentioned on its homepage or pricing page |
| MIS sync | Yes: Wonde, on school accounts | Yes: Rosters through Wonde and Google Classroom |
| Student data | Yes: Individual accounts: work not kept, names redacted in your browser. Schools: kept under a DPA | Yes: Says UK-hosted and never trains on your work |
| Free trial | Yes: 10 free credits for teachers; 30-day trial for schools | Yes: 10 papers free every month |
Where MarkIt is strong
- Cheaper than a per-script price for short maths papers.
- A free allowance every month, and paid page packs that never expire.
- Built only for maths, with AQA, Edexcel and OCR specifications named.
- Says it is UK-hosted and never trains on your work.
Where GradeOrbit is different
- GradeOrbit charges per student script, not per page, so a 40-page mock costs the same as a 2-page quiz.
- GradeOrbit marks every subject, including English, science, humanities and languages.
- GradeOrbit publishes the sample size, exam board and date behind its accuracy figures.
- GradeOrbit school seats include unlimited marking and AI detection, with Wonde roster sync.
Which should you choose?
- MarkIt may suit you if
- You mark short maths papers and want the lowest cost per page, or a free monthly allowance.
- GradeOrbit may suit you if
- You mark long mocks, or subjects beyond maths, and want one price per script.
Sources
- MarkIt homepage (checked 25 October 2026)
- MarkIt pricing (checked 25 October 2026)
- MarkIt accuracy benchmarks (checked 25 October 2026)
Everything about MarkIt on this page comes from its own public pages on the date shown, and may have changed since. We have not used MarkIt’s product. MarkIt is a trademark of its owner and is named here only to compare. Spotted something out of date? Tell us and we will correct it.