Founders & startup ecosystem · Core
Co-founder
Also called: cofounder
ELI5
One of several people who start a company together.
Used in conversation
“The co-founders need explicit decision rights.”
Definition
One of two or more people who establish and initially build a company together.
Here “Co-founder” means: One of two or more people who establish and initially build a company together.
Pitch context
You will see “Co-founder” in fundraising decks, data rooms, term sheets and investor conversations when the discussion reaches founders & startup ecosystem.
Why it matters: It helps a reader interpret founders & startup ecosystem without confusing the measure, decision, role or evidence being discussed.
Sources & evidence · 5
Supporting source families. This entry is an editorial synthesis rather than a quotation from one canonical glossary.
- U.S. Securities and Exchange Commission — Small Business Capital Formation GlossarySupporting source family · primary · checked 2026-08-16
- U.S. Securities and Exchange Commission — Exempt OfferingsSupporting source family · primary · checked 2026-08-16
- National Venture Capital Association — Model Legal DocumentsSupporting source family · institutional · checked 2026-08-16
- Y Combinator — Safe financing documentsSupporting source family · practitioner · checked 2026-08-16
- Y Combinator — Series A Term Sheet TemplateSupporting source family · practitioner · checked 2026-08-16