# Kastle funding: rounds and investors

> Kastle has raised $24M across 1 round since 2026. Investors include Y Combinator, Insight Partners and Commerce Ventures. Every round with its source.

Source: https://millionrounds.com/company/kastle (Millionrounds; every figure on the page links to its filing or article)

United States · [Series A startup](https://millionrounds.com/companies)

# Who invested in *Kastle*

One round we have observed, with the 4 investors named in it. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it.

AI

Raised 2 months ago

Funding summary Updated 26 Oct 2026

**$24M** raised across 1 round since 2026, from 1 source

- **Latest round:** Series A, $24M Sept 2026
- **Investors:** 4

See who backed them

## The rounds

- **Sept 2026** Series A **$24M** [Y Combinator](https://millionrounds.com/fund/y-combinator) [Insight Partners](https://millionrounds.com/fund/insight-venture-partners) [Commerce Ventures](https://millionrounds.com/fund/commerce-ventures) [Fifth Wall](https://millionrounds.com/fund/fifth-wall) Source recorded

## Everyone who backed them

[Y Combinator](https://millionrounds.com/fund/y-combinator) Accelerator **1** round

[Insight Partners](https://millionrounds.com/fund/insight-venture-partners) VC firm **1** round

[Commerce Ventures](https://millionrounds.com/fund/commerce-ventures) VC firm **1** round

[Fifth Wall](https://millionrounds.com/fund/fifth-wall) VC firm **1** round

Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=kastle).

## Quick answers about Kastle

### Who invested in Kastle?

Kastle's investors include Y Combinator, Insight Partners, Commerce Ventures and Fifth Wall.

### 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.

## Companies like Kastle

In the same sector, and raised in the last eighteen months.

[**SpaceX** $42B · Oct 2026](https://millionrounds.com/company/spacex)[**xPay** $1.5M · Oct 2026](https://millionrounds.com/company/xpay)[**Albert Invent** $20M · Oct 2026](https://millionrounds.com/company/albert-invent)[**FORT Robotics** $39M · Oct 2026](https://millionrounds.com/company/fort-robotics)[**Pika** $216M · Oct 2026](https://millionrounds.com/company/pika)[**Vertical Semiconductor** $84M · Oct 2026](https://millionrounds.com/company/vertical-semiconductor)

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