United States · 
Who invested in Castle?
Castle's investors include Boost VC and Winklevoss Capital.
United States · Pre-seed startup
Who invested in Castle
Funding summaryUpdated 26 Oct 2026
$1.0Mraised across 1 round since 2025, from 1 source
- Latest round
- Pre-seed, $1.0MJun 2025
- Investors
- 2
CastleReal estate1 / 14Their pitch deckCastle's pitch deck, 14 slidesEach slide read for what it argues, against the decks that raised at the same stage.→The rounds
- Jun 2025
Founders and team
From Castle's own website: 1 founder, 1 on the team.
John DomsyFounder of Cardata
- Scott BurnsCTO of SeQent
Everyone who backed them
Missing a round, or an investor who was in one? Tell us.
Also claim to have backed them
These 6 firms list Castle as a portfolio company on their own websites, but no report of a round names them. They are the firms' own claims, kept apart from the rounds above.
Quick answers about Castle
How much has Castle raised?
Castle has raised $1.0M across 1 round since 2025.
When did Castle last raise?
Castle's most recent round was a Pre-seed of $1.0M in Jun 2025.
What was Castle's biggest round?
Its most recent round, $1.0M in Jun 2025, is also its largest on record.
Who backed Castle first?
Castle's first round on record, in Jun 2025, was backed by Boost VC and Winklevoss Capital.
What stage is Castle at?
Castle's latest named round is a Pre-seed, in Jun 2025.
Where is Castle based?
Castle is based in the United States.
Companies like Castle
In the same sector, and raised in the last eighteen months.
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