United States · 
Who invested in Kastle?
Kastle's investors include Y Combinator, Insight Partners, Commerce Ventures and Fifth Wall.
United States · Series A startup
Who invested in Kastle
Funding summaryUpdated 26 Oct 2026
$24Mraised across 1 round since 2026, from 1 source
- Latest round
- Series A, $24MSept 2026
- Investors
- 4
The rounds
- Sept 2026
Everyone who backed them
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Quick answers about Kastle
How much has Kastle raised?
Kastle has raised $24M across 1 round since 2026.
When did Kastle last raise?
Kastle's most recent round was a Series A of $24M in Sept 2026.
What was Kastle's biggest round?
Its most recent round, $24M in Sept 2026, is also its largest on record.
Who backed Kastle first?
Kastle's first round on record, in Sept 2026, was backed by Y Combinator, Insight Partners and Commerce Ventures and 1 others.
What stage is Kastle at?
Kastle's latest named round is a Series A, in Sept 2026.
Where is Kastle based?
Kastle is based in the United States.
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