Fair questions, straight answers.

An independent AI marking tool built for the IB Diploma Programme. Submit an Extended Essay, TOK essay or Group 1 HL essay and a swarm of specialist AI examiners returns descriptor-pinned bands, line-level annotations and a next-draft roadmap. It analyses and advises — it never writes a word for you.

Paste your essay text or upload it as a PDF, then choose the exact task — EE in History, TOK essay on title 3, English A HL essay. The correct official descriptor set loads itself, your first criterion is marked free, and the full report typically lands in about four minutes. No card required.

Not for your first free criterion. An account unlocks your marking history, draft-over-draft tracking and saved reports — registration takes under a minute.

The Extended Essay in all subject groups (including an RPPF check), TOK essays on the current prescribed titles, and Group 1 Higher Level essays. Subject-specific task sheets — History Paper 2/3, Psychology ERQs and more — are added continuously.

Instead of one generalist model, six specialist examiner agents read your essay in parallel — Rubric Keeper, Evidence Hunter, Argument Architect, Language Examiner, Devil’s Advocate and the Chair, a chief-examiner agent that rules last. Each finding must survive cross-examination by the others before it reaches your report.

Several frontier engines from different providers — models in the class of OpenAI’s GPT, Anthropic’s Claude and Google’s Gemini. Each agent is assigned the engine best suited to its job, and no band decision rests on a single model.

Because a single model asked twice can give two different bands. Every finding is re-tested across engines and through several marking iterations: unsupported claims get struck, disagreements get escalated rather than averaged away. What survives the gauntlet is a consensus the descriptors actually support — the most accurate score and feedback we can defend.

Our reports are built to be checked, not believed: every comment cites the line of your essay it refers to and the official descriptor it is measured against. That said, essaycriteria supplements — never replaces — your supervisor’s guidance. Final grades rest only with your school and the IB’s examiners.

Good — that’s critical thinking, and the report is built for it. Every ruling shows its evidence, so you can appeal to your teacher with specifics rather than feelings. If you can prove the report wrong, that argument is exactly the kind your examiner will respect.

About four minutes for a full 4,000-word EE. The swarm reads in parallel — the Chair is the slow one, reading everything twice.

Yes — if the writing is yours. Our feedback works like a very thorough set of teacher’s comments: it diagnoses, it never ghost-writes. The integrity scan also surfaces citation anomalies and sudden register shifts, so you can fix them before your supervisor does.

Never. There is no “generate my essay” button, and there never will be. The swarm reads, marks and advises — the pen stays in your hand.

Nothing is shared with your school unless you choose to share your reports. We’d encourage transparency — supervisors generally react well to students who actively engage with the criteria.

Yes. Educator accounts add a teacher dashboard, cohort analytics, bulk submissions and RPPF screening — the swarm handles the repetitive first pass so teachers can spend their comments where a human matters.

Your writing stays yours. Essays are encrypted in transit and at rest, deleted automatically after 30 days, and never used to train models. You can request deletion at any time.

Essays and account data are encrypted, access is restricted, and your work is never sold, shared for advertising, or added to any plagiarism database. Our full data practices are in the privacy policy.

Only with the providers essential to running the service — AI engines and hosting — under data processing agreements that forbid them from using your content for their own purposes, including training.

Your first criterion is free, forever — full swarm treatment, no card required. A full report across all criteria is $12 per essay. Schools and cohorts get custom pricing.

Major credit and debit cards through a secure payment processor. Schools can pay by invoice.

Yes — a 14-day money-back guarantee if no essay has been processed on the purchase.

Yes — special pricing for departments, tutoring centres and whole cohorts. Talk to us and we’ll scope it.

Check the file is a PDF and under the size limit, or simply paste the text instead. If it still fails, try another browser and then contact support — failed submissions are never charged.

Reports usually arrive in about four minutes. Check your dashboard and your email spam folder; if 15 minutes have passed, contact support with your submission ID.

Yes — the whole experience, including the annotated report, is fully responsive across phones, tablets and desktops.