GreatHorn is a new kind of security platform that prevents email based attacks by automatically helping recipients understand whether an email they just received is safe.
We plug directly into today's major email providers like Google Apps and Office 365, and in realtime, we analyze every message for both externally observable indicators of threat as well as indicators that only we can see, based on the huge amounts of messaging data we analyze on a daily basis.

Company Growth (employees)
Belmont, US
Size (employees)
10 (est)
Greathorn was founded in 2015 and is headquartered in Belmont, US

Key People at Greathorn

Kevin O’Brien

Kevin O’Brien

CEO and Co-Founder
Raymond Wallace

Raymond Wallace

CTO and Co-Founder
Christopher Fraser

Christopher Fraser

Vice President, Strategic Accounts

Greathorn Office Locations

Greathorn has an office in Belmont
Belmont, US (HQ)
116 Beech St

Greathorn Metrics

Summary Metrics

Founding Date


Total Funding

$2.5 m

Latest funding size

$2.3 m

Time since last funding

about 1 year


Greathorn's latest funding round in March 2016 was reported to be $2.3 m. In total, Greathorn has raised $2.5 m

Greathorn Online Presence

Greathorn Company Life

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