Compatibility.work is a free, browser-based collection of personality and relationship compatibility tests covering MBTI, Big Five, Enneagram, zodiac, moon phase, love languages, attachment styles, and a homegrown SBTI format.
What is Compatibility.work?
Compatibility.work is a free web tool that runs personality and relationship compatibility tests in the browser and returns a match report without requiring an account. You either pick two types from a selector — for example two of the 16 MBTI profiles — or answer a questionnaire, and the site returns a percentage score with a written breakdown of what clicks, what clashes, and what to talk about. It runs entirely on the open web with no desktop or mobile app, and the reports are framed as entertainment and self-reflection rather than clinical assessment.
What makes Compatibility.work stand out?
- Eight test types under one roof — MBTI compatibility, zodiac compatibility, moon phase compatibility, SBTI, love language compatibility, attachment style, Enneagram, and Big Five, so you do not need a separate site per framework.
- AI-generated MBTI reports — the MBTI compatibility test uses DeepSeek AI to assemble the breakdown from the two types you select.
- 16 MBTI profiles with nicknames — INTJ (The Architect), ENFP (The Campaigner), INTP (The Thinker), ENTJ (The Commander), ENTP (The Debater), INFJ (The Advocate), INFP (The Mediator), ENFJ (The Protagonist), ISTJ (The Logistician), ISFJ (The Protector), ESTJ (The Executive), ESFJ (The Consul), ISTP (The Virtuoso), ISFP (The Adventurer), ESTP (The Entrepreneur), ESFP (The Entertainer).
- Featured pairings with match percentages — the homepage shows worked examples such as INTJ × ENFP at 94%, INFJ × ENTP at 91%, and ISTJ × ESFP at 88%.
- Questionnaire tests with stated lengths — the attachment style quiz uses 30 questions inspired by ECR/RSQ themes across secure, anxious, dismissive-avoidant, and fearful-avoidant patterns (about 3 minutes); the Enneagram test uses 36 questions covering 9 types, wings, and growth directions; the Big Five test uses 50 OCEAN questions and runs about 7 minutes.
- No signup and no paywall — every basic test is free and returns instant results without creating an account.
- Local-first data handling — most test interactions run in your browser and supported test history is stored locally on your device; raw questionnaire answers are not uploaded even when you request optional AI analysis.
Who should use Compatibility.work?
Romantic partners comparing communication styles will get the most from the MBTI selector, which pairs any two of the 16 types and returns a scored report.
Friends and coworkers who keep clashing can run the same two-type selector to get a neutral, third-party description of where the friction sits.
Self-reflectors uninterested in compatibility can take the Big Five, Enneagram, or SBTI tests alone, with the Big Five offering the strongest research base of the frameworks on offer.
Casual browsers who want a 30-second diversion can use the zodiac or moon phase tools, which the site openly labels as tradition-based and not scientific.
What can you do with Compatibility.work?
Couples working through recurring arguments: select both MBTI types and read the AI-written breakdown of shared strengths and likely friction points to use as a conversation starter.
People curious about their emotional patterns: take the 30-question attachment style quiz with no signup and get placed among secure, anxious, dismissive-avoidant, or fearful-avoidant patterns in roughly three minutes.
Anyone comparing frameworks: move between Big Five, Enneagram, MBTI, and SBTI on the same site to see how different models describe the same traits, without re-registering anywhere.
Astrology-minded users: match two zodiac signs or two birth moon phases for a lighter, entertainment-oriented reading.
How does the MBTI compatibility test work?
- Select your MBTI type and your partner's type from the 16 personality profiles.
- DeepSeek AI assembles a compatibility breakdown covering what clicks, what clashes, and what to talk about.
- You read the report, which the site notes is for entertainment even if it feels accurate.
The questionnaire tests follow a different path: answer the fixed set of questions once and receive an individual profile rather than a pair score.
Is Compatibility.work free?
All basic compatibility and personality tests on Compatibility.work are free and require no signup, with instant results. AI analysis is optional, and the site is ad-supported — it uses cookies to serve ads and analyze traffic, with a reject option in the cookie banner.
FAQ
Do compatibility tests predict relationship success?
No — the site states plainly that no test can predict relationship success. What the results can do is highlight patterns and differences that might be worth discussing with your partner.
Do I need an account, and where do my answers go?
No account is needed. Most interactions run in your browser and supported test history is stored locally on your device. If you request optional AI analysis, computed results and descriptions are sent to the server and AI provider, but raw questionnaire answers are not uploaded.
How is moon phase compatibility calculated?
It matches your birth moon phase against your partner's, with different phases representing different emotional energies. The site describes this as not scientific while noting many people find the descriptions surprisingly accurate to their experience.
What is the difference between sun sign and moon sign compatibility?
Sun sign is your main zodiac sign — the one most people know — while moon sign reflects your emotional side and how you feel and react. The site suggests both can be interesting without overthinking either.
Which test has the strongest research backing?
The 50-question Big Five (OCEAN) test has the strongest empirical research base among the frameworks offered, though the site notes its own implementation is not a validated clinical assessment and MBTI or Enneagram evidence is more limited or mixed.
