MBTI costs $50-250 and half of people get a different type on retest. Soultrace is free and uses probability distributions instead of binary categories.

16Personalities uses static questions and Big Five mapping. Soultrace uses adaptive Bayesian inference. Here's how they compare on accuracy, methodology, and results.

Big Five is psychology's gold standard but gives you dry percentile scores. Soultrace gives actionable archetypes. Here's how they actually compare.

CliftonStrengths costs $50+ and focuses on workplace talents. Soultrace is free and maps your full personality. Different tools — here's which fits you.

DISC measures surface behaviors. Soultrace measures core psychological drives. Here's why the difference matters for actual self-understanding.

The Enneagram has rich psychology but zero peer-reviewed validation. Soultrace uses Bayesian inference. Here's what that means for your results.

Keirsey sorts you into 4 temperaments. Soultrace maps you across 25 archetypes with probability distributions. More granularity, more insight.

Truity charges $29-79 for detailed results. Soultrace is 100% free. We compare methodology, accuracy, pricing, and what you actually get from each.