not invented here

Reject outside ideas

Not invented here describes a bias against adopting ideas, products, or solutions that originated outside one's own organization or group.

The phrase captures a kind of institutional pride or defensiveness that leads people to reject or reinvent perfectly good external solutions simply because they didn't create them.

The engineering team dismissed the open-source library—classic not invented here syndrome.

It's often shortened to NIH, especially in tech and business contexts.

Related

phenomenon · turf wars · aversion · echo chambers · mindset · disdain · tribalism · closed shop · dismissal · prejudice · exclusion · distrust · cognitive dissonance · skepticism · groupthink · slippery slope · homegrown · inside job

Opposites
openness to external ideas

not invented hereopen-mindedness

Acceptance of differing viewpoints

cosmopolitanism · eclecticism · intellectual humility · pragmatism · internationalism

collaboration stance

not invented hereknowledge sharing

Transferring expertise between people

crowdsourcing · open standards · community-driven · cross-pollination · interoperability

Family

not, invent, invented, here, invention, inventions, inventor, inventors, inventive

Familiarity
Top 500,000
Profile
Used worldwide · Timeless · Abstract · Rated G