I’ve always been fascinated by Myers-Briggs (MBTI) and how personality types influence compatibility in friendships. As an INTJ, I’m naturally drawn to friends who are intellectually stimulating, thoughtful, laid-back, and have strong integrity. Interestingly, the two best friends I’ve ever had—Luke and Erica—are both INFJs. Despite their differences—Luke being louder, more direct, and outspoken, and Erica being reflective, emotionally resonant, and empathetic—they share qualities that made our friendship chemistry undeniable.
Even more intriguing, the last few partners I’ve had have all been INTJs, like me. And when I asked 30 of my friends about their MBTI types, every single one turned out to be Intuitive. While some people dismiss MBTI as pseudoscience, I’ve found it surprisingly useful for understanding friendship compatibility.
If you’ve ever wondered why some friendships feel effortless while others are draining, your MBTI personality type might offer some clues. Understanding MBTI friendship compatibility can help you build deeper connections, navigate differences, and form friendships that truly last.
In this guide, we’ll explore all 16 MBTI types and their compatibility in friendships—their friendship strengths, potential challenges, and the personalities they naturally click with.
While Myers-Briggs is a fascinating tool for understanding personality and potential compatibility, it only scratches the surface. True connection requires looking beyond type — understanding emotional availability, shared values, communication style, and energy alignment. These four fundamental components of psychological compatibility more vastly capture the kind of people you truly click with and are highly correlated with MBTI types.
That’s exactly what 6Clique does: it helps you discover and connect with people who resonate with you on a deeper level — with no swipes, high engagement levels, and meaningful conversation about personal growth, emotions, philosophy, psychology, and more.
Jump to Your Type
- ISTJ – The Logistician
- ISFJ – The Nurturer
- INFJ – The Advocate
- INTJ – The Mastermind
- ISTP – The Virtuoso
- ISFP – The Adventurer
- INFP – The Mediator
- INTP – The Thinker
- ESTJ – The Executive
- ESFJ – The Consul
- ENFJ – The Protagonist
- ENTJ – The Commander
- ESTP – The Entrepreneur
- ESFP – The Entertainer
- ENFP – The Campaigner
- ENTP – The Debater
1. ISTJ – The Logistician
Discover deeper compatibility →Traits: Responsible, detail-oriented, loyal, dependable, practical.
Friendship style:
ISTJs value stability, trust, and reliability. They thrive in friendships where commitments are
honored and expectations are clear. They often express care through actions rather than words,
and
prefer calm, predictable interactions over spontaneous adventures.
Most compatible types:
- ESTJ: Shares their structured, dependable approach. Conversations are practical and straightforward, and both respect rules and reliability. The friendship feels safe and mutually supportive.
- ISFJ: ISFJs’ warmth and attentiveness complement ISTJs’ reserved, practical nature. They create a harmonious balance of care and reliability.
Potential challenges:
- ENTP: ENTPs’ spontaneity and constant new ideas can feel chaotic to ISTJs, while ISTJs’ rigidity can frustrate ENTPs.
- ENFP: Highly expressive and exploratory energy may overwhelm ISTJs’ preference for calm and order.
Tips for friendship success: ISTJs appreciate friends who honor commitments, follow through on promises, and communicate clearly. To foster a strong connection, be consistent and dependable while respecting their need for structure and order. ISTJs often express care through actions rather than words, so showing thoughtfulness through practical support is meaningful. They prefer calm, predictable interactions, so avoid unnecessary drama or frequent last-minute changes. ISTJs also enjoy deep discussions that have substance, so share insights and perspectives that reflect thoughtfulness. Be patient with their reserved nature, as they may take time to open up emotionally. Emphasize shared responsibilities and mutual respect to build a friendship where both parties feel secure and valued. Understanding and honoring their methodical approach can transform a casual acquaintance into a lasting, supportive friendship.
2. ISFJ – The Nurturer
Discover deeper compatibility →Traits: Caring, empathetic, loyal, detail-oriented, observant.
Friendship style:
ISFJs thrive in supportive, emotionally safe friendships. They notice small details, remember
important events, and often put their friends’ needs before their own. They are excellent
listeners and prefer intimate, one-on-one or small group settings.
Most compatible types:
- ISTJ: Shared loyalty and responsibility make for dependable friendships. ISTJs’ practicality complements ISFJs’ emotional attentiveness.
- ESFJ: Mutual care, attentiveness, and social awareness create harmonious interactions. They often instinctively anticipate each other’s needs.
Potential challenges:
- ENTP: Energetic and spontaneous, ENTPs may disrupt ISFJ’s preference for calm, predictable routines.
- INTP: Analytical, detached energy may feel emotionally distant to ISFJs, who value warmth and reassurance.
Tips for friendship success: ISFJs value loyalty, attentiveness, and thoughtful gestures, so being considerate of their needs and feelings is crucial. Demonstrate reliability and trustworthiness, as ISFJs often invest deeply in friendships and expect reciprocity. They appreciate friends who notice small details and show care in meaningful ways. Open communication is important; express your own needs while being patient with their gentle, often reserved demeanor. ISFJs prefer one-on-one or small group interactions, so creating space for intimate, meaningful conversations strengthens your bond. Avoid being overly critical or dismissive, as they are sensitive to rejection. Encourage them to embrace spontaneity and flexibility, balancing their natural preference for structure. By respecting their nurturing nature while being authentic and communicative, you can cultivate a deep, lasting friendship rooted in trust, understanding, and mutual care.
3. INFJ – The Advocate
Discover deeper compatibility →Traits: Insightful, idealistic, empathetic, deep, private.
Friendship style:
INFJs seek meaningful, emotionally resonant friendships. They are highly intuitive about others’
feelings, often providing guidance and support. They enjoy conversations with depth and value
authenticity over social pleasantries.
Most compatible types:
- ENFP: Inspires INFJs with energy, curiosity, and shared values. Conversations flow naturally, balancing emotional depth with playfulness.
- INTJ: Provides strategic thinking and introspective depth, creating a profound, intellectually satisfying connection.
Potential challenges:
- ESTP: May feel too shallow or impulsive; INFJs prefer depth and intentionality.
- ESFP: Fun-loving energy may lack the reflective quality INFJs crave.
Tips for friendship success: INFJs value emotional resonance, thoughtfulness, and integrity. To connect with an INFJ, engage in conversations with substance, share your values and ideals, and be genuine in your intentions. They often have a small circle of close friends, so showing patience and consistency is key. INFJs are intuitive and highly perceptive, so they appreciate empathy and emotional awareness in others. Respect their need for alone time to recharge, but be present when they seek guidance or support. Sharing creative or intellectual interests can enhance the bond. Avoid superficial interactions or trivial gossip, as INFJs prioritize depth. They thrive when friendships involve mutual trust, understanding, and shared exploration of ideas and emotions. By demonstrating authenticity, empathy, and curiosity, you help INFJs feel seen, understood, and valued, leading to a profound and lasting connection.
4. INTJ – The Mastermind
Discover deeper compatibility →Traits: Strategic, analytical, independent, visionary, determined.
Friendship style:
INTJs prefer intellectually stimulating friendships. They value competence, honesty, and mutual
respect. They often form deep bonds slowly, prioritizing quality over quantity.
Most compatible types:
- ENTP: Creative, adaptable, and idea-driven. Challenges INTJ in stimulating ways while complementing structure with flexibility.
- INFJ: Shared depth and reflection, creating emotionally and intellectually satisfying connections.
Potential challenges:
- ESFP: Fun-focused, spontaneous energy may feel shallow.
- ISFP: Relaxed, flexible approach may clash with INTJ’s intensity and long-term planning.
Tips for friendship success: INTJs desire friendships that offer depth, honesty, and strategic insight. They appreciate friends who are competent, thoughtful, and willing to engage in meaningful discussions. Avoid small talk or shallow interactions; instead, focus on topics that allow for shared exploration and problem-solving. INTJs respect independence and personal boundaries, so give them space to think, reflect, and pursue their goals. They value loyalty and reliability, so demonstrating consistency builds trust. Embrace their vision-oriented mindset by engaging in long-term planning or strategic conversations. They enjoy friends who can challenge their ideas while remaining respectful, fostering mutual growth. Avoid being overly emotional or unpredictable, as INTJs prefer rational, structured interactions. By combining intellectual engagement with respect for their autonomy and supporting their long-term vision, you can cultivate a friendship that is stimulating, meaningful, and enduring.
5. ISTP – The Virtuoso
Discover deeper compatibility →Traits: Independent, practical, adventurous, observant, adaptable.
Friendship style:
ISTPs enjoy low-pressure, flexible friendships. They prefer shared activities over heavy
emotional conversations and thrive in situations where independence is respected.
Most compatible types:
- ESTP: Shares love of action, problem-solving, and spontaneous adventures.
- ISFP: Flexible, experience-oriented friendships that respect freedom and creativity.
Potential challenges:
- INFJ: Deep emotional focus may feel restrictive or intense.
- ESFJ: Highly structured, social energy may overwhelm ISTPs’ desire for flexibility.
Tips for friendship success: ISTPs value independence, practical problem-solving, and shared experiences over deep emotional discussions. To connect with an ISTP, engage in hands-on activities, adventures, or projects that allow mutual participation. Avoid overly controlling or emotionally demanding behaviors, as ISTPs prefer friends who respect their autonomy. They appreciate straightforward, honest communication and a relaxed approach to social interactions. Being adaptable and open to spontaneity helps maintain rapport, as ISTPs enjoy flexibility and excitement. Share practical advice, skills, or experiences that interest them, and be ready for lighthearted, energetic interactions. Avoid forcing prolonged emotional conversations, but be receptive when they choose to share. By offering freedom, trust, and shared engagement, you foster friendships where ISTPs feel valued, respected, and energized.
6. ISFP – The Adventurer
Discover deeper compatibility →Traits: Sensitive, creative, adaptable, easy-going, aesthetic-minded.
Friendship style:
ISFPs cherish authentic, low-stress connections, often bonding through shared experiences and
creative activities. They avoid confrontation and value harmony.
Most compatible types:
- ISTP: Shared independence, activity-based interactions, mutual appreciation of freedom.
- ESFP: Playful, spontaneous, emotionally expressive connections.
Potential challenges:
- INTJ: Rigid, goal-focused approach may feel restrictive.
- ENTJ: High-intensity, structured energy may overwhelm ISFP’s laid-back style.
Tips for friendship success: ISFPs are sensitive to the emotional climate and thrive when they feel accepted and understood. To support an ISFP, respect their need for independence and personal space while being open and empathetic. Engage in creative or shared experiences that allow them to express themselves naturally. Avoid overly critical or rigid behaviors, as ISFPs prefer flexibility and spontaneity. They appreciate gestures of care and thoughtfulness more than verbal assurances. Listening attentively and validating their emotions strengthens the bond. They respond well to friends who are patient, gentle, and adaptable, balancing structured interactions with opportunities for exploration. By honoring their desire for freedom, creativity, and emotional safety, you create a friendship that is both meaningful and nurturing.
7. INFP – The Mediator
Discover deeper compatibility →Traits: Idealistic, empathetic, imaginative, loyal, introspective.
Friendship style:
INFPs seek emotionally deep, value-aligned friendships. They often go above and beyond for
friends who share their ideals and can be sensitive to perceived rejection.
Most compatible types:
- ENFP: Shared curiosity, idealism, and playful energy foster mutual understanding and inspiration.
- INFJ: Complementary depth and introspection, creating emotionally rich, meaningful bonds.
Potential challenges:
- ESTJ: Overly structured, pragmatic energy may feel rigid or dismissive.
- ISTJ: Practical focus may clash with INFP’s imaginative, idealistic approach.
Tips for friendship success: INFPs desire friendships built on authenticity and trust. They thrive when they can share their ideals, dreams, and reflections without judgment. To cultivate a strong friendship, demonstrate empathy, patience, and genuine interest in their thoughts and feelings. INFPs value meaningful conversations and shared curiosity, so engage in discussions about personal growth, ethics, and creative ideas. Avoid dismissing their emotions or imposing rigid structures, as this can create tension. They appreciate friends who honor boundaries, respect introspection, and allow space for self-reflection. Encouraging their creative pursuits and supporting their ideals fosters deep connection. By being consistent, understanding, and aligned with their core values, you can build a lasting friendship where INFPs feel truly seen, understood, and inspired.
8. INTP – The Thinker
Discover deeper compatibility →Traits: Analytical, curious, independent, imaginative, logical.
Friendship style:
INTPs enjoy intellectually stimulating friendships with a lot of freedom. They often bond over
ideas, problem-solving, and shared exploration, preferring low-pressure interactions.
Most compatible types:
- ENTP: Energetic, idea-focused, and playful friendships full of debate and exploration.
- INTJ: Thoughtful, strategic friends who appreciate shared intellectual depth.
Potential challenges:
- ESFJ: Highly structured, socially expressive energy may feel overwhelming.
- ENFJ: Constant emotional engagement may feel draining to the independent INTP.
Tips for friendship success: INTPs value friendships where curiosity, exploration, and independent thinking are encouraged. They thrive when friends respect their need for freedom and autonomy. Engage in idea-driven conversations, debates, and problem-solving discussions to maintain their interest. Avoid overly emotional or rigid interactions, as INTPs respond best to logic and analytical reasoning. They appreciate friends who can challenge their thinking respectfully and contribute new perspectives. Provide space for introspection while remaining approachable for collaboration or shared exploration. INTPs value authenticity, creativity, and mental agility. By fostering a balance between independence and engagement, you create a friendship that is dynamic, thought-provoking, and mutually enriching.
9. ESTJ – The Executive
Discover deeper compatibility →Traits: Organized, practical, responsible, direct, dependable.
Friendship style:
ESTJs value structure, reliability, and loyalty in friendships. They enjoy clear expectations,
social order, and friendships that often include shared responsibilities or goals. They are
natural organizers and may take the lead in group activities.
Most compatible types:
- ISTJ: Shared sense of responsibility and reliability. Both value clear expectations and consistency, making for predictable, stable friendships.
- ESFJ: Mutual focus on social harmony, loyalty, and attentiveness. Friendships are supportive and action-oriented, often involving group events or mutual planning.
Potential challenges:
- INFP: Idealistic, flexible nature may feel slow or impractical to ESTJ.
- ISFP: Laid-back, low-structure approach may clash with ESTJ’s desire for organization and planning.
Tips for friendship success: ESTJs thrive with friends who honor commitments, respect rules, and appreciate order. To connect with an ESTJ, be organized, clear, and dependable in your interactions. They enjoy group activities and collaborations where roles and responsibilities are well-defined. Avoid being inconsistent or unpredictable, as ESTJs prefer predictability and accountability. They value direct communication and appreciate when friends express expectations and intentions clearly. Offering practical support and participating in goal-oriented activities strengthens the bond. Recognize and respect their natural leadership tendencies while contributing constructively. By combining reliability, honesty, and shared responsibility, you cultivate friendships that feel secure, empowering, and enduring.
10. ESFJ – The Consul
Discover deeper compatibility →Traits: Caring, sociable, organized, loyal, attentive.
Friendship style:
ESFJs thrive in supportive, emotionally connected friendships. They are attentive to friends’
needs, often remembering important events, and actively seek to maintain harmony and positive
social dynamics.
Most compatible types:
- ISFJ: Both prioritize loyalty, emotional support, and attentiveness. Friendships feel nurturing, predictable, and harmonious.
- ESTJ: Complementary focus on structure, responsibility, and social reliability. Conversations are practical, and both can rely on each other.
Potential challenges:
- ISTP: Independent, low-social-energy friends may feel distant or disengaged.
- INTP: Analytical, detached energy may frustrate ESFJs’ warmth and need for emotional engagement.
Tips for friendship success: ESFJs thrive when friends are attentive, considerate, and emotionally responsive. To connect, actively listen, validate their feelings, and show appreciation for their efforts to maintain harmony. ESFJs enjoy participating in social events and group activities where they can contribute and nurture others. Avoid cold or detached behavior, as ESFJs are sensitive to perceived distance. Clear communication, reciprocity, and thoughtfulness are key. Encourage them to balance their giving nature with self-care and boundaries. By honoring their loyalty, expressing gratitude, and engaging in collaborative, meaningful experiences, you foster friendships that are vibrant, nurturing, and mutually rewarding.
11. ENFJ – The Protagonist
Discover deeper compatibility →Traits: Charismatic, empathetic, organized, inspiring, supportive.
Friendship style:
ENFJs excel in emotionally rich, mutually supportive friendships. They often take on the role of
motivator or mentor in their friend groups, seeking harmony and personal growth for everyone
involved.
Most compatible types:
- INFP: Shares emotional depth and idealism, creating a bond of understanding and shared values.
- ENFP: High-energy, curious, and playful friendships full of mutual support, exploration, and excitement.
Potential challenges:
- ISTP: Detached, independent energy may feel distant or disengaging.
- INTP: Analytical, reserved friends may not meet ENFJ’s emotional openness.
Tips for friendship success: ENFJs value empathy, collaboration, and encouragement. To build a strong connection, actively engage in discussions, share goals, and provide thoughtful feedback. ENFJs are natural motivators who enjoy helping friends achieve their potential, so reciprocating support and acknowledging their efforts fosters trust. They appreciate openness, honesty, and shared enthusiasm for personal growth. Avoid dismissiveness or lack of engagement, as ENFJs are sensitive to relational dynamics. Providing space for their guidance while maintaining your own independence ensures a balanced friendship. By combining encouragement, transparency, and shared experiences, you create connections that are energizing, inspiring, and long-lasting.
12. ENTJ – The Commander
Discover deeper compatibility →Traits: Strategic, ambitious, decisive, confident, goal-oriented.
Friendship style:
ENTJs enjoy goal-focused, intellectually stimulating friendships. They value competence, mutual
respect, and efficiency. Friendships often involve shared challenges, brainstorming, or
collaborative problem-solving.
Most compatible types:
- INTJ: Shared strategic thinking and vision create powerful, intellectually satisfying friendships.
- ENTP: Energetic, innovative, and stimulating friendships that combine creativity with goal-oriented focus.
Potential challenges:
- ISFP: Relaxed, flexible approach may clash with ENTJ’s intensity and structured plans.
- INFP: Sensitive, idealistic approach may feel slow or impractical.
Tips for friendship success: ENTJs appreciate friends who are proactive, competent, and willing to engage in strategic discussions. To cultivate a strong bond, demonstrate initiative, share ideas, and contribute to collaborative problem-solving. ENTJs respect efficiency, honesty, and decisiveness, so avoid indecision or inconsistency. They enjoy dynamic interactions and thrive when challenged constructively. Providing thoughtful, goal-aligned support strengthens the connection. ENTJs value friends who balance ambition with empathy, allowing for both intellectual stimulation and emotional understanding. By fostering mutual respect, initiative, and strategic collaboration, you can build friendships that are motivating, enduring, and fulfilling.
13. ESTP – The Entrepreneur
Discover deeper compatibility →Traits: Energetic, practical, spontaneous, observant, action-oriented.
Friendship style:
ESTPs thrive in adventurous, high-energy friendships. They enjoy excitement, shared experiences,
and friendships with minimal drama or rigid expectations.
Most compatible types:
- ISTP: Mutual love for action, flexibility, and problem-solving. Friendships often involve hands-on activities or adventures.
- ESFP: Shared spontaneity, fun, and high-energy experiences make for dynamic, engaging friendships.
Potential challenges:
- INFJ: Prefers reflection, depth, and intentionality, which may feel slow or intense to ESTPs.
- INFP: Reserved, idealistic nature may not keep up with ESTP’s fast-paced energy.
Tips for friendship success: ESTPs value action, excitement, and practical engagement. To connect, participate in activities that are hands-on, dynamic, and interactive. ESTPs appreciate honesty, flexibility, and adaptability, avoiding rigid rules or overplanning. They enjoy humor, playfulness, and shared excitement, making social spontaneity a key bonding factor. Avoid overly emotional or restrictive behaviors that might constrain their freedom. ESTPs value friends who are confident, engaged, and open to exploration. By embracing an active, energetic, and adaptable approach, you cultivate friendships that are exciting, lively, and mutually stimulating.
14. ESFP – The Entertainer
Discover deeper compatibility →Traits: Playful, spontaneous, social, adaptable, fun-loving.
Friendship style:
ESFPs enjoy joyful, high-energy friendships. They thrive in environments filled with shared
activities, laughter, and emotional expressiveness. They often act as social catalysts in
groups.
Most compatible types:
- ISFP: Relaxed, creative, and easy-going friendships with shared appreciation for freedom and experiences.
- ESTP: Shared love of excitement, spontaneity, and action-based fun.
Potential challenges:
- INTJ: Structured, goal-focused thinking may feel rigid or restrictive.
- ISTJ: Highly organized, cautious energy may clash with ESFP spontaneity.
Tips for friendship success: ESFPs thrive when interactions are lively, spontaneous, and engaging. To connect, participate in activities that involve shared excitement, creativity, or social engagement. They appreciate warmth, authenticity, and responsiveness, enjoying friends who show enthusiasm and genuine interest. Avoid overly rigid, critical, or distant behaviors. ESFPs enjoy friendships that allow freedom, emotional expression, and joyful experiences. By being present, energetic, and adaptable, you foster bonds that are vibrant, supportive, and fulfilling.
15. ENFP – The Campaigner
Discover deeper compatibility →Traits: Energetic, curious, imaginative, empathetic, spontaneous.
Friendship style:
ENFPs seek emotionally engaging, playful friendships. They thrive on novelty, idea exploration,
and deep conversations, often bringing excitement and creativity to every interaction.
Most compatible types:
- INFJ: Complements ENFP’s curiosity with thoughtful reflection and emotional depth.
- INFP: Shared idealism, imagination, and emotional resonance create meaningful, stimulating friendships.
Potential challenges:
- ISTJ: Structured, cautious energy may feel restrictive.
- ISTP: Detached, low-emotional engagement may feel unfulfilling.
Tips for friendship success:
ENFPs thrive when
interactions are creative, curious, and authentic. To build rapport, engage in meaningful
conversations, share adventures, and explore ideas together. ENFPs value emotional openness,
spontaneity, and flexibility. Avoid dismissing their enthusiasm or restricting their creative
expression. They appreciate friends who can balance their high energy with thoughtful
reflection. Encouraging curiosity, supporting ideals, and celebrating unique perspectives
strengthens the connection. By being open-minded, engaging, and emotionally present, you create
friendships that are inspiring, dynamic, and enduring.
16. ENTP – The Debater
Discover deeper compatibility →Traits: Energetic, inventive, playful, curious, adaptable.
Friendship style:
ENTPs thrive in dynamic, idea-driven friendships. They enjoy debating, exploring possibilities,
and pushing boundaries, often sparking growth and inspiration in friends.
Most compatible types:
- INTJ: Strategic, deep thinkers create intellectually stimulating friendships.
- ENTJ: Energetic, goal-oriented friendships that combine vision with creativity.
Potential challenges:
- ISTJ: Highly structured, cautious energy may feel restrictive.
- ISFJ: Prefers stability over novelty, which may clash with ENTP’s adventurous approach.
Tips for friendship success:
ENTPs thrive when
friends are curious, open to debate, and willing to explore possibilities. Engage in
discussions, challenge ideas respectfully, and participate in creative problem-solving. ENTPs
enjoy spontaneity, humor, and flexibility, so avoid overly rigid or controlling behaviors. They
appreciate friends who can adapt quickly, think critically, and embrace new perspectives.
Providing space for independence while maintaining connection fosters trust and engagement. By
encouraging curiosity, creativity, and honest communication, you cultivate friendships that are
lively, thought-provoking, and mutually enriching.
Conclusion
Understanding MBTI friendship compatibility can provide valuable insights into how different personality types connect and navigate relationships. While MBTI offers a helpful framework for recognizing patterns in communication and preferences, true friendship compatibility goes beyond type alone.
6Clique takes friendship compatibility to the next level by focusing on four core psychological metrics: emotional availability, shared values, communication style, and energy alignment. Unlike MBTI, which only categorizes broad personality traits, these metrics examine the underlying dynamics that make friendships thrive.
Emotional availability measures how open, empathetic, and responsive someone is in relationships, helping you avoid connections that feel one-sided or draining. Shared values ensure that your priorities, ethics, and life goals align, reducing friction and creating a sense of mutual understanding. Communication style accounts for how you express yourself and interpret others, preventing misunderstandings and fostering authentic conversation. Finally, energy alignment considers how your levels of social engagement, pace, and emotional intensity sync with potential friends, ensuring you feel energized rather than exhausted after interactions. Together, these metrics capture the nuanced, real-world qualities that MBTI alone cannot, providing a more accurate and actionable measure of friendship compatibility.
On 6Clique, you can be automatically matched into small groups with people whose psychological profiles align with yours, ensuring conversations are meaningful and connections are deeper from the start. This approach goes beyond MBTI to create friendships that truly resonate.
Discover your ideal friendships today and connect with people who get you on a deeper level through 6Clique’s scientifically-informed compatibility matching.