# Alt-X funding: rounds and investors

> Alt-X has raised $500K across 1 round since 2025. Investors include Y Combinator. Every round with its source.

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

United States · [Pre-seed startup](https://millionrounds.com/companies)

# Who invested in *Alt-X*

One round we have observed, with the one investor 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.

Big Data & Analytics

Raised 11 months ago

Funding summary Updated 26 Oct 2026

**$500K** raised across 1 round since 2025, from 1 source

- **Latest round:** Pre-seed, $500K Dec 2025
- **Investors:** 1

See who backed them

## The rounds

- **Dec 2025** Pre-seed **$500K** [Y Combinator](https://millionrounds.com/fund/y-combinator) Source recorded

## Everyone who backed them

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

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

## Also claim to have backed them

This firm lists Alt-X as a portfolio company on their own website, but no report of a round names it. They are the firms' own claims, kept apart from the rounds above.

[Alpha Transform Holdings](https://millionrounds.com/fund/alpha-transform-holdings) VC firm Per its own site

## Quick answers about Alt-X

### Who invested in Alt-X?

Alt-X's investors include Y Combinator.

### How much has Alt-X raised?

Alt-X has raised $500K across 1 round since 2025.

### When did Alt-X last raise?

Alt-X's most recent round was a Pre-seed of $500K in Dec 2025.

### What was Alt-X's biggest round?

Its most recent round, $500K in Dec 2025, is also its largest on record.

### Who backed Alt-X first?

Alt-X's first round on record, in Dec 2025, was backed by Y Combinator.

### What stage is Alt-X at?

Alt-X's latest named round is a Pre-seed, in Dec 2025.

### Where is Alt-X based?

Alt-X is based in the United States.

## Companies like Alt-X

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

[**SpaceX** $42B · Oct 2026](https://millionrounds.com/company/spacex)[**STRIVE** $1.3B · Oct 2026](https://millionrounds.com/company/strive)[**Xona** $512M · Oct 2026](https://millionrounds.com/company/xona)[**DrizzleX** $9.1M · Oct 2026](https://millionrounds.com/company/drizzlex)[**Prism Data** $25M · Oct 2026](https://millionrounds.com/company/prism-data)[**Homa** $5.0M · Oct 2026](https://millionrounds.com/company/homa)

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