Who invested in Fathom Online?
Fathom Online's investors include Constellation Ventures.

United States · Series A startup
Funding summaryUpdated 26 Oct 2026
$6.0Mraised across 1 round since 2004, from 1 source
From historical deal records. Wrong? Tell us.
Fathom Online's investors include Constellation Ventures.
Fathom Online has raised $6.0M across 1 round since 2004.
Fathom Online's most recent round was a Series A of $6.0M in Jul 2004.
Its most recent round, $6.0M in Jul 2004, is also its largest on record.
Fathom Online's first round on record, in Jul 2004, was backed by Constellation Ventures.
Fathom Online's latest named round is a Series A, in Jul 2004.
Fathom Online is based in the United States.
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