Learning and careers decision
TEST WHIZ
A useful subset (PDF/YouTube chat plus generators) is realistic for one developer to build and host in about a week; reproducing the browser extension that 'works on any online platform' and any claimed undetectability or product polish is much harder and likely requires more effort or proprietary work.
Visit website↗Built by Sadek, who ships 3 products in this index
$12.99/mo
$156/yr
Read off the official pricing page.
$100one-off33 h to build
$100/mo3 h/mo upkeep
On cash alone, building overtakes the subscription at 9 seats.
Open-source builds that already do this
Every project below is open source and already does this job today. Fork one, self-host it, or take the parts you need - the build prompt further down assumes an empty file, and this is the shortcut past that. Licences differ; check the one on each card before you ship. All TEST WHIZ alternatives, with the arithmetic →
What a replacement has to do
- User uploads a PDF or pastes a YouTube URL, backend extracts text/transcript, sends context to an LLM to produce chat responses, quizzes, flashcards, notes and worksheets, and returns results in a web UI.
What it still won’t have
- Chrome extension that injects into any online class or platform
- Claims about being 'undetectable' on other platforms
- Priority support and any proprietary heuristics or polishing not implemented
- Tight browser integration that solves problems in-place on arbitrary sites
What remains hard
- Product polish and ongoing maintenance
First-year cost
Keep paying
Paying is—cheaper in year one.
On cash alone, building overtakes the subscription at 9 seats.
Money you would actually spend
Time you would spend
—
What you would spend
What we assumed
The verdict above measures whether you could build it. This one is only about money.
Runnable build prompt
Build a one-user web app (Next.js + React frontend, Node.js + Express backend, Postgres or SQLite for storage) that lets a logged-in user: 1) upload PDFs (parse text + OCR fallback), 2) paste YouTube URLs and fetch transcripts, 3) open a chat UI that answers questions grounded in uploaded content, and 4) generate/export flashcards, quizzes, notes, and worksheets from selected content. Use the OpenAI API (or another LLM provider) for generation with prompt templates and rate limiting. Include simple email/password auth (or OAuth), file storage (S3-compatible), background jobs for heavy processing (Bull or sidekiq-style), request-level error handling, input validation, and unit/integration tests for parsing, transcript fetching, and LLM integration. Out of scope: a Chrome extension that injects into arbitrary third-party sites, any attempt to evade detection, and enterprise billing/priority-support features.
How we checked
How the score was reached
- Partly verdict base52
- An open-source build was found+5
- 3 cited sources+3
- Price verified on pricing page+3
- 3/3 assessment runs agreed+4
- Evidence score67
The base comes from the verdict. Everything under it is a check that either happened or did not, and each one is a fact frozen in this record rather than a judgement made at render time - so the same evidence always produces the same number.
How scoring works →Cited sources · 3
Every page the run actually retrieved.
- official productTestWhiz product page
- official pricingTestWhiz pricing
- open sourceHugeCatLab/ChatTutor
Integrity checks
What held up, and what did not.
