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MBTI Friendship Compatibility

ISTP

the one who quietly fixes it

ISTP friendship compatibility: best friends with ISTJ. As a friend, ISTP is the one who quietly fixes it — the bike chain, the wobbly table, the broken phone screen — and then changes the subject. The stereotype says ISTPs are calm, independent and practical, the friend who is great in a crisis and happy with a long comfortable silence. They bond by doing things side by side: climbing, gaming, cooking, driving nowhere. In our friendship rule ISTP scores highest with ISTJ, who shares the S, I and T and supplies the plan an ISTP will happily ignore half of. The hardest friendship on paper is with ENFP, the midnight texter, whose stream of feelings and ideas can overload someone who answers with a thumbs-up.

Best friend type
ISTJ
96% · the one who actually brings the charger
Hardest match
ENFP
64% · the “are you up?” texter

Top 3 friends for ISTP

The hardest friendship for ISTP

All 16 types as ISTP's friend

Friend scores follow one rule we designed ourselves: base 46; S/N same +18 or different +2; E/I same +14 or +6; J/P different +10 or same +6; T/F same +8 or +4. Not an official MBTI product.

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Frequently asked questions

Who is ISTP's best friend type?

In our friendship rule ISTP scores highest with ISTJ (96%), the type that shares three letters and differs only in J/P. Next come ISFJ (92%), ESTJ (88%). The rule is our own design and not a science, so treat it as a conversation starter.

Which type is the hardest friend for ISTP?

The lowest friend score for ISTP goes to ENFP (64%): different E/I, S/N and T/F but the same J/P. It means more negotiating, not a ban — plenty of opposites stay friends for life.

Is ISTP's best friend the same as its best love match?

Not here. In our love-match rule ISTP's top match is ESFJ (99%), while its top friend is ISTJ (96%), because the love rule rewards opposite E/I and T/F and the friendship rule rewards sharing them.