Edexia: AI marking and feedback assistant

01

How much revenue does Edexia make?

Each row shows the evidence grade and the source numbers from the list at the end of this page. The grades are explained in How Aiolum verifies.

A four-person Brisbane company that says it went from 11 schools at the end of 2024 to more than 50 in November 2026, with no published price and no revenue figure
Fact	Value	Grade	How we know	Sources
Schools using Edexia, November 2026	more than 50 (company statement)	C	Home page and reviews page, read 7 November 2026: 'Trusted by 50+ of the best schools', followed by 17 school names. The reviews page quotes named teachers at Assumption College Kilmore, Marist College Bendigo and Hale School, and role titles only at St Joseph's College Echuca and Waverley Christian College.	[1, 6]
Schools in the last quarter of 2024	11, with 30 more partnerships being arranged for the first quarter of 2025	C	Founders' Y Combinator launch post, 11 December 2024: 'we have already collaborated with 11 of Australia's best schools in Q4 2024 and are arranging an additional 30 partnerships for Q1 2025'.	[4]
Launch	1 August 2024	C	Same launch post: 'Since launching on August 1st'. The year follows from the progress it reports for the last quarter of 2024.	[4]
Founded, place and team	2023, Brisbane; 4 people	C	Y Combinator company page, read 7 November 2026: founded 2023, team size 4, Brisbane, batch Winter 2025. The company's team page names four people: the two founders and two Heads of School Partnerships, for NSW/ACT and for Victoria.	[3, 12]
Funding	Y Combinator and angel investors; amounts not published	C	About page: 'incubated at Y Combinator' and 'backed by the founders of Clever, ClassDojo, and Coursedog'. No amount is stated in the sources read.	[3, 13]
Agreement with teachers in a trial	teachers accepted the AI grade 81.2% of the time; within one grade band 98.3% of the time; 579 essays	C	Company FAQ: a trial across 579 VCE English essays at St Bernard's College. The CEO's team page gives the same result as 81% and 98%. No independent report of the trial was read.	[2, 12]
Prices	not published	C	FAQ: 'Contact us for details on plans and pricing for your department.' The General Terms describe paid service agreements with contract terms and charges.	[2, 7]
Student accounts	free, created by the student to join a teacher's class	C	Privacy policy, 31 October 2026: students sign in with Google, Microsoft or an email code, give first name, surname, email and year level, and join a class with the teacher's link or code 'so they can hand in work to their teacher'.	[10]
Where student data goes	stored in Sydney; names removed before AI processing; not used for training	C	Subprocessor list, 31 October 2026: AWS and Supabase in Sydney hold the data; language models from Amazon Bedrock, Google Vertex AI and Azure Foundry process de-identified work in Sydney; GPTZero in the United States receives de-identified submissions for AI-writing detection. FAQ: 'Edexia does not use user data to train or fine-tune AI models', and the platform is assessed under ST4S.	[8, 2]
Founders' earlier company	"$200K ARR" in just over a year (founders' statement; currency not stated)	C	Launch post: 'After growing it to $200K ARR in just over a year, we pivoted to Edexia'. Their YC bios say they built it at 18 (Gibbon) and 17 (Wang). The about page says it was 'in the tutoring and resources domain'. Its name is not given.	[4, 3, 13]
Time from launch to the November 2026 count	27 months	calc	Calculated: 1 August 2024 to November 2026.	[4, 1]

How to read this table: a grade C value is a statement by the company or its founders on their own pages or Y Combinator's site, or by a third party that repeats them. A grade X value was computed on this page. No value is grade A or B, and no money figure for Edexia itself was found.

Edexia prices in November 2026: no prices are published (company FAQ and General Terms, grade C)
Plan	Per month, billed yearly (US$)	Per month, billed monthly (US$)	Limit
Free sign-up	0	0	'Try Edexia free'; trial or lasting free plan not stated
School or department agreement			price not published; 'Contact us for details'

The FAQ says: 'Edexia offers flexible pricing for schools. Contact us for details on plans and pricing for your department.' Every page offers 'Try Edexia free' and 'Book a demo'. The General Terms (updated 30 October 2026) describe service agreements with a contract term that renews automatically, and charges that Edexia may vary at the end of a term with at least 90 days' written notice. Whether the free sign-up is a trial or a lasting free plan is not stated. No student price was found: students sign up to hand in work to a teacher's class, and the students page also offers practice of their own.

02

When did Edexia launch, and how did it grow?

From a second education start-up in Brisbane to a marking platform that names more than 50 schools, in 27 months. Each entry carries its grade.

2023CDaniel Gibbon and Nathan Wang, who met at university, leave their first education company and found Edexia. [3, 4, 13]
1 August 2024CEdexia launches with schools in Australia. [4]
11 November 2024CBusiness News Australia reports that Edexia was accepted into Y Combinator for 2025 (article title and date as listed on the YC company page; the article itself could not be opened). [3]
11 December 2024CLaunch post on Y Combinator: 11 schools in the last quarter of 2024 and 30 more partnerships being arranged. [4]
January 2025CGibbon is in San Francisco for the Y Combinator batch that YC lists as Winter 2025, while studying for a Bachelor of Engineering (Honours) at the University of Queensland. [5, 3]
October and November 2026CNew General Terms, privacy policy and child-safety policy; the home page says Edexia is used at more than 50 schools, and the team page lists Heads of School Partnerships for NSW/ACT and for Victoria. [1, 7, 11, 12]

03

Why did Edexia work?

Four causes, in the order they mattered. Each one is a reusable lesson.

01

The teacher stays the marker

Edexia drafts a mark and feedback; the teacher changes what they want and releases it. In blind marking, several teachers and Edexia mark the same script without seeing each other's marks, and the screen shows the spread between them. This is <dfn>moderation</dfn>, the check that teachers in one faculty give the same work the same mark, and the company sells it as a way to hold a whole year group to one standard.

02

Built to pass a school's checks

Schools must approve any tool that handles student work. Edexia stores data in Sydney, removes names and other identifiers before a model sees the text (<dfn>de-identification</dfn>), does not train models on the work, and is assessed under <dfn>ST4S</dfn> (Safer Technologies 4 Schools), the security and privacy review run for Australian and New Zealand schools. It publishes nine policy documents, a child-safety policy and a list of every subprocessor.

03

Every exam board by name

The site has a page for each subject of each Australian senior certificate (HSC, VCE, QCE, WACE, SACE, TASC, BSSS, NTCET) plus IB and AP, and marks against each board's own criteria. It sells through school partnership leads per state and direct work with Heads of English, not through a self-serve price list.

How it was built

These details come from the company's subprocessor list, FAQ, privacy policy and team pages. They are grade C. [8, 2, 14, 10]

Hosting on Amazon Web Services in Sydney, database and file storage on Supabase in Sydney, the web front end on Vercel, background jobs on Hatchet, error logs on Sentry and product analytics on PostHog.
Foundation models, large general AI models bought from a provider, come from Amazon Bedrock, Google Vertex AI and Azure Foundry, all called in Sydney. The table does not name the models, but its 'AI model terms' links point to the licence and usage policy of gpt-oss-120b, an open-weight OpenAI model, and to Azure OpenAI's data-privacy terms.
A de-identification step replaces names, places, card numbers and identity numbers with a placeholder for the category before any external AI call.
The CTO built the handwriting reader, which reads scanned scripts with arrows and crossings-out and marks them against each board's rubric. Scans are stored and transcribed in Australia.
No fine-tuning on school data: marking uses the task, the rubric, curriculum context, approved examples and the teacher's settings. A lead marker can apply a reversible calibration to one activity's unreleased marks.
AI-writing detection combines GPTZero with writing replay, a keystroke record of how a typed answer was written. Firecrawl fetches public web pages for teaching resources.

Tools named in the sources

Each one opens its page in the Tools tab, with every story that uses it.

04

Who tried this before Edexia, and why did they fail?

Three companies in our database of failed startups sold grading or student-data software to schools and failed. The values below are from that database and are not independently verified.

Died 2010 to 2013Burned US$500K

ClassroomIQ

The promise

Digital grading of paper exams and assignments for teachers.

Why it died

Schools adopted digital tools slowly, larger firms had the school relationships, and it did not add AI grading in time.

Competition

Died 2010 to 2013Burned US$250K

Edusight

The promise

A platform for K-12 teachers to track student performance and manage classroom assessments.

Why it died

Slow school procurement and better-funded rivals such as ClassDojo and Seesaw; it never won district partnerships early.

Competition

Died 2011 to 2014Burned US$100M

InBloom

The promise

One data store for every student's records, so schools could personalise teaching.

Why it died

Parents and teachers objected to how student data would be used, states withdrew, and the money could not restore trust.

Legal/Regulatory

The failed startups come from our database of 1,749 dead startups, retold here in our own words. Its entries are AI-assisted summaries of public sources, so these cards carry no evidence grade.

What changed

ClassroomIQ and Edusight put grading and assessment records on a screen, but the teacher still did all the marking, and both ran out of time in slow school buying cycles. InBloom gathered student data and lost the schools over privacy. Edexia meets the same buyers and the same fears.

Two things differ. A language model now drafts the mark and the comments, so the time saved is the marking itself, not only the paperwork around it. And Edexia answers the privacy question before it is asked: data kept in Australia, names removed before AI processing, no training on student work, an ST4S assessment and a published child-safety policy. The slow buying cycle has not changed, which is why two of its four people are school partnership leads.

05

Can one person copy Edexia now?

The AI draft, yes. The school trust work, slowly.

A solo founder can build a first marking draft with a foundation model and one exam board's published criteria. What took Edexia's team longer is the rest: a rubric for every subject of every board, handwriting, moderation tools, data kept in one country, a school security assessment, and sales to heads of departments. Each of those is a reason a school says yes, and none of them is the model.

Where it is still open: Other national exam systems with published criteria and heavy teacher marking: the UK's GCSE and A-level boards, New Zealand's NCEA, and university first-year courses.

1Pick one exam board and one subject, and mark against its published criteria, not a generic essay score.
2Keep the teacher as the one who releases every mark, and show where human and AI marks differ.
3Remove student names before any model call, keep data in the country, and get the local school security assessment early.
4Sell to the head of a department, who owns the marking load, and publish trial results with the school named.

What could go wrong for Edexia?

The risks are the mirror image of the causes above.

What is not verified

No revenue figure was found. The founders' launch post of 11 December 2024 gives only counts (11 schools, 30 more being arranged), and the home page in November 2026 says 'Trusted by 50+ of the best schools'; both are company statements. Named teachers on the reviews page support use at a few of the listed schools. The 579-essay trial result is also the company's own. We looked for a payment-processor profile, a founder interview or post with a revenue amount, and a company filing, and found none; a Business News Australia article of 11 November 2024 returned 403 Forbidden and was not read. A reader could look for a later founder update with figures, a school's published report on the trial, or the company's records with ASIC, the Australian company register.

Students under 18 use it

Edexia is sold to schools, but secondary students, most of them under 18, use it to hand in work and to chat with its tutor. Its students page speaks to them directly ('Edexia, your companion in AP', 'Practise whenever you like. Start your own practice') with a 'Get started' button to a student sign-up; the privacy policy says students create their own accounts with name, email and year level and join a class with the teacher's code. No student price was found. The child-safety policy of 14 October 2026 applies the 10 Queensland Child Safe Standards and says the tutor 'cannot write directly into a student's response' and that teachers can review its chats. The AI-detection feature replays 'how every typed piece was written' and sends de-identified submissions to GPTZero in the United States.

Founders were teenagers at their first company

Their Y Combinator bios say each built the earlier education company to '200k ARR' at 18 (Gibbon) and 17 (Wang), before Edexia was founded in 2023. No source gives birth dates. In January 2025 UQ Ventures described Gibbon as a Bachelor of Engineering (Honours) student, and Wang's team page says he taught university courses as a second-year student at QUT. Calculated from these statements, both are at least 19 in November 2026.

Competition

Edexia's FAQ names student-facing marking tools (MarkPoint, Study Marker, StudyPulse, AusGrader, Studytwin) and says it differs by sitting with the teacher; on this site EssayGrader and EasyClass AI also sell AI grading to teachers, and both have a dated money figure, which Edexia does not.

Depends on model providers

The subprocessor list of 31 October 2026 names Amazon Bedrock, Google Vertex AI and Azure Foundry for 'foundational language models' and GPTZero for AI-writing detection. The table names no model, but its 'AI model terms' links point to the licence of OpenAI's open-weight gpt-oss-120b and to Azure OpenAI's data-privacy terms, so the exact model in use is not confirmed. Because Edexia does not fine-tune on school data, its marking quality rests on these providers' models plus its own rubrics, examples and calibration; a provider that stopped serving models in Sydney would force a change to its data promise.

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Built with the same tools

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Sources

The grade next to each source is the best grade that the source can support. "Read in full" means that the text of the page was downloaded and the numbers were checked in it.

C Edexia home page, read 7 November 2026: The most comprehensive teaching assistant for schools
Read in full. Source for 'Trusted by 50+ of the best schools', the school names, the product features and the team list.
C Edexia FAQ, read 7 November 2026
Read in full. Source for how marking works, the 579-essay trial, 'Contact us' pricing, data handling, ST4S and the named student-facing competitors.
C Y Combinator company page: Edexia, AI Teacher Assistant for Grading Essays
Read in full (downloaded 7 November 2026, including the page data). Source for year founded, team size, Brisbane, batch Winter 2025, the founders' bios and the press list with the Business News Australia title and date; that article returned 403 Forbidden and was not read.
C Y Combinator Launches, 11 December 2024: Edexia, AI Teaching Assistant for Grading Papers
Read in full (the post as embedded in the YC company page data downloaded 7 November 2026). The founders' own post. Source for the launch date, the 11 schools, the 30 partnerships and the earlier company.
C UQ Ventures, 20 January 2025: Ventures alumni lands in SF
Read in full. A University of Queensland page. Source for Gibbon's degree and his time at Y Combinator.
C Edexia reviews page, read 7 November 2026: What teachers say
Read in full. Source for the five teacher testimonials and their schools.
C Edexia General Terms, last updated 30 October 2026
Read the sections on service agreements, contract terms, price variations and fees. Shows that schools buy paid agreements.
C Edexia Subprocessor list, last updated 31 October 2026
Read in full. Source for hosting, model providers, GPTZero and the de-identification step.
C Edexia for students, read 7 November 2026
Read in full. Source for the student-facing tutor, the own-practice feature and the student sign-up button.
C Edexia Privacy Policy, last updated 31 October 2026
Read the sections on student accounts and file storage.
C Edexia Child Safety and Wellbeing, effective 14 October 2026
Read in full. Source for the Queensland Child Safe Standards and the tutor's limits.
C Edexia team page: Daniel Gibbon, CEO
Read in full. Source for the three problems, the 81% and 98% trial result, the states where it is live and the team list.
C Edexia About page: Our Company
Read in full. Source for the earlier tutoring company and the angel investors.
C Edexia team page: Nathan Wang, CTO
Read in full. Source for the handwriting reader and his time at QUT.
C Database of failed startups, local export
Local export. AI-written summaries, not independently verified. Source for the failed predecessors.

Run this company? Send corrections or a verified figure to aiolum@livyden.com