English UsageComparison guide
Co-founder vs. Cofounder
Cambridge records both “co-founder” and “cofounder” for the same role. The difference is orthographic, so house-style consistency matters more than treating one form as universally wrong.
Both “co-founder” and “cofounder” are recorded. Follow your house style and use one form consistently.
Key details
Confusion Familyhyphenation variant
Rule Familyword-boundaries
TermsCo-founder, Cofounder
Variant ScopeCambridge records “co-founder” and also gives “cofounder” as an alternate form.
Further guidance
Core difference
Both “co-founder” and “cofounder” are recorded forms for a person who establishes an organization with one or more other people.
Usage Boundary
Because both forms are documented, follow the spelling preferred by your publication or organization and keep it consistent.
Sources and evidence
Sources are shown with the role they play in this guide. Historical or style-sensitive claims are kept within the evidence boundary described above.
- Co-founder — Cambridge Dictionary (opens in a new tab)Cambridge University Press · Dictionary evidence recording co-founder with cofounder as an accepted alternate form.