County Mayo · Ireland · All-Ireland champions 2026

Built in Mayo

Mayo is known for plenty. Croagh Patrick, Achill, the Wild Atlantic Way, and, after 75 years of waiting, the All-Ireland champions. Sam Maguire is finally home. What gets talked about a wee bit less is the people quietly building companies here.

This page pulls together what Dealroom knows about them: who they are, who backs them, where they learned the ropes and who has bought them. The footballers have set the bar high this year, and the founders are well able for it.

Where they are

StartupEstablished businessDot size shows headcount

Companies per town

Ones to watch

When and what they build

Companies started or headquartered in Mayo, by founding year and industry.

Companies founded per year

Top industries

A company can carry up to two industries.

Venture funding raised, all time

Connections

Who funds Mayo companies, where the founders worked and studied before, and who has bought Mayo businesses. Built from funding and deal records and founder career histories.

Who backs whom

Backs two or more Mayo companiesBacks oneMayo company

Hover or tap an investor or company to trace its links. Acquirers are shown separately below.

Shared roots

Employers and universities that turn up in more than one Mayo founder's background, plus the medtech firms several founders came through.

Who bought Mayo companies

Acquisitions recorded by Dealroom, newest first.

Mayo to the world

Distance and direction from Castlebar

Founders with a Mayo company in their pastInvestorsAcquirers

Each spoke points the true compass direction from Castlebar; the distance scale is logarithmic so Galway and Sydney both fit. Hover a city for who is there.

Founders elsewhere with Mayo on their CV

The builders

How this was counted