Twenty questions, no right answers. Some let you pick more than one. All of them you can skip. At the end you'll see where your worldview sits — and which thinkers across history have stood near you.
Mull places you in a 16-dimensional space of philosophical tendencies — things like Trust in Reason, Tragic Vision, Mystical Receptivity, Communal Embeddedness, Self as Illusion. Each answer is a small vector that nudges your position.
Philosophers in the map have positions too, drawn from their actual writings. Buddha and Hume both score high on Self as Illusion but for opposite reasons. Nietzsche and Sartre both score high on Sovereign Self but split on Will to Power. The dimensions catch real distinctions.
You're a continuous point in space, not a fixed type. A political compass collapses everything to two axes and four quadrants. MBTI sorts you into one of sixteen boxes. Mull never collapses you. Two people who get the same archetype headline still have different fingerprints — and the same person, taking the test six months later, will land somewhere slightly different as their thinking shifts.
The archetype on the result page is a useful label, not a verdict. The real result is the 16-dimensional position you can see in your profile and, eventually, watch evolve over time.
Click any to read more.
Built on nights and weekends. Funded by nothing in particular.
Philosophy is the original tool for examining your own thinking — the discipline that refuses to take its own framing for granted. Most people leave it behind after one survey course because the way it's taught makes it feel like memorizing a museum: dates, names, doctrines, exam.
Mull inverts that. Instead of teaching you what dead philosophers thought, it asks what you think — concretely, on real questions — and shows you where that places you in the long conversation. The map isn't a verdict, it's a mirror. The 166 thinkers in the constellation are there as company, not as curriculum.
This started as a weekend project. It is still a weekend project.
Mull was built as a conversation between a person and an AI. To be transparent about who did what:
The code is Claude's. Every line of HTML, CSS, and JavaScript on this site — and the database schemas, deployment scripts, and AI integration that come next — was written with Claude (Anthropic's AI) as a pair-programmer. Jimmy isn't a developer. Without Claude, this product wouldn't exist as a working site.
The product is Jimmy's. Every meaningful decision that shaped what Mull is came from the person side of that conversation. Including:
Some things were drafted in conversation. The specific archetype names, the 16 dimensions, the 166-philosopher database, the figure illustrations, the reading list — these were drafts Claude proposed and Jimmy refined, vetoed, or approved. Calling any of that purely one party's work would be dishonest. The shape that emerged is genuinely shared.
But every choice — every archetype kept, every feature designed, every direction taken — was made by a person. The tool typed. The person decided.
Real products with real databases and AI analysis cost real money. Here's what Mull actually costs us, every month, at different sizes — and what it would earn if 5% of users subscribed to Mull+ at $4.99/month.
| Active users | Monthly cost | Revenue at 5% conversion | Net |
|---|---|---|---|
| Under 100 | ~$5 | ~$25 | +$20 / mo |
| 1,000 | $50–200 | ~$250 | break-even |
| 10,000 | $550–1,600 | ~$2,500 | +$900–1,950 |
| 100,000 | $5,000–15,000 | ~$25,000 | +$10,000–20,000 |
Costs scale roughly with three things: hosting (Vercel), the database (Supabase), and AI inference (Claude). The wide ranges reflect how much usage we get from active users — heavy daily-dilemma writers cost more than casual quiz-takers.
If Mull stays small forever, fine. The site keeps running. Existing features stay maintained. Whoever signed up keeps their account.
If Mull grows past break-even, every dollar of margin goes back into the product: better LLM analysis, scholars to verify philosopher positions, illustrators to redo the figures properly, content writers for the learning lab, infrastructure that doesn't fall over.
If Mull grows past that, the principles on this page do not change. No ads. No data selling. The free tier stays generous. The map of your thinking belongs to you.
Built by Jimmy Ji, a student at King's College London. Currently a one-person project — though it's young, and it'll grow. If you want to help, push back on a question, suggest a thinker I missed, or report a bug, write to jimmy.kaian.ji@gmail.com.
Every quiz-taker lands somewhere on this map. Each archetype is a recognizable shape of how a person can think — but most people sit between several. Click any archetype to see a richer page (coming soon).
One hundred sixty-six thinkers across cultures and eras, placed by the positions in their actual writings. Hover any star to read about them. Lines connect philosophers in the same neighborhoods of thought. Take the quiz to see where you appear in this space.
This is a sketch — a starting point. To go further, continue the practice of organized thought through our daily dilemma: one new question every morning that nudges your map over time, and a thought diary that lets you watch your worldview evolve. Sign-up sits at the bottom of the screen.
Each star is one of 166 thinkers, placed by the positions in their actual writings and colored by their closest archetype. Stars near you appear larger; distant ones recede. The pulsing gold star is you. Lines connect philosophers in the same neighborhoods of thought. Click any star to fly there — and for stars near you, click "Compare with you" to see where you align and where you diverge.
Your match is highlighted. Click any to read more.