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64 Types
The 16 personality types, extended to 64 with real science
64 Types rebuilds the 16 personality types on research-grade traits. Each familiar letter is a Big Five trait scored from public-domain IPIP items, shown as a percentile against norms from 40,000+ people. Two letters the 16 types leave out, Emotional Stability and Honesty-Humility, make 64 types (e.g. INTJ-CM). Borderline scores are flagged, life-area pages cite research, and compatibility has no fake %. Free, ~8 min, no signup, in 26 languages. Optional $7.99 Deep Report.
Hi Product Hunt 👋 I'm the solo maker of 64 Types.
I kept running into the same problem: the 16 types are fun and everyone knows them, but the research behind them is thin. Scores are continuous, people near the middle flip letters on retest, and the 4 letters miss emotional stability entirely, which is the trait most tied to wellbeing and relationship outcomes.
So I rebuilt it:
1) every letter is a Big Five trait scored from public-domain items, shown as a percentile against open data;
2) two new letters, Emotional Stability and Honesty-Humility, make 64 types;
3) if you're borderline on a letter, the result says so instead of pretending.
The thing I'm proudest of is what I didn't build: a compatibility %. The best data (Dyrenforth et al., 2010, 23k+ people) says similarity explains under 0.5% of relationship satisfaction, so the compare tool shows where two people differ and what's worth talking about instead.
A question for you: when you got a "borderline" letter, was the retest-code explanation clear or confusing? I'd love feedback on that screen.
About 64 Types on Product Hunt
“The 16 personality types, extended to 64 with real science”
64 Types was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #432 on the daily leaderboard. 64 Types rebuilds the 16 personality types on research-grade traits. Each familiar letter is a Big Five trait scored from public-domain IPIP items, shown as a percentile against norms from 40,000+ people. Two letters the 16 types leave out, Emotional Stability and Honesty-Humility, make 64 types (e.g. INTJ-CM). Borderline scores are flagged, life-area pages cite research, and compatibility has no fake %. Free, ~8 min, no signup, in 26 languages. Optional $7.99 Deep Report.
On the analytics side, 64 Types competes within Education and Quantified Self — topics that collectively have 82.4k followers on Product Hunt. The dashboard above tracks how 64 Types performed against the three products that launched closest to it on the same day.
Who hunted 64 Types?
64 Types was hunted by Zach Chen. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of 64 Types including community comment highlights and product details, visit the product overview.
Zach Chen