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cofounder

American  
[koh-foun-der] / koʊˈfaʊn dər /
Or co-founder

noun

  • cofounders
    plural
  1. a person who founds or establishes something with another.


Other Word Forms

Noun Inflected Forms

Etymology

Origin of cofounder

First recorded in 1595–1605; co- + founder 1

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

This week: The new book Money to Burn goes deep on private-equity behemoth Apollo Global Management and its billionaire cofounder and former CEO, Leon Black.

From Slate Sep. 12, 2026

The four companies were defense technology companies Anduril Industries and Shield AI; Uber cofounder Travis Kalanick’s new venture, Atoms; and El Segundo-based nuclear energy startup Valar Atomics.

From Los Angeles Times Aug. 21, 2026

“It allows for people to not feel so alone,” says Jayme Cyk, cofounder of And Repeat, who’s written about her struggles with anxiety on her Substack “I’m On An Antidepressant.”

From The Wall Street Journal Jul. 7, 2026

"In five years' time, we hope to be able to have a wide range of ingredients" drawing on the company's fermentation platform, says Daryl Pek, a cofounder of Mottainai Food Tech.

From BBC Jun. 4, 2026

In the same burgundy booth a few hours later, Michael A. Wiener, cofounder of the multibillion-dollar Infinity Broadcasting, grabbed a bite with his wife, Zena.

From "Class Matters" by The New York Times

"A particularly hair-raising moment was when my cofounders asked, 'If you have control, what happens when you die?' He said something like '...maybe it should pass to my children.'"

From BBC May 12, 2026

Koyeb’s 16 engineers, including the startup’s three cofounders, will join in March, Mistral said Tuesday.

From The Wall Street Journal Feb. 18, 2026

At the time, Apple’s cofounders, he added, were “putting everything on the line.”

From Los Angeles Times Jan. 13, 2026

The cofounders of Anthropic, who were also executives at OpenAI until 2020, had broken from their employer over disagreements regarding how to ensure AI's safe development and governance.

From Reuters Nov. 22, 2023

“We are relieved and overjoyed to continue helping the many women who come to our clinic seeking help,” said Dede Chism and Abby Sinnett, mother-and-daughter cofounders of Bella Health and Wellness.

From Washington Times Oct. 23, 2023

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