# cofounder

/ˈkoʊˈfaʊndɝ/ (US) · CEFR B2 · Noun

Source: https://englishreference.com/word/cofounder
Updated: 2026-10-18

## Definition

a person who starts a company or project together with one or more other people. You share the work and decisions from the beginning.

For teachers: a person who jointly establishes a company, organization, or venture with one or more others, sharing responsibility for its creation.

## Examples

- She is the cofounder of a small bakery.
- As cofounder of the startup, he handles product design while his partner manages sales.
- The cofounder reflected on the early years, when limited funding forced the team to work from a garage and test every idea directly with customers.

## Synonyms

founder

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.