# Portal Space Systems funding: rounds and investors

> Portal Space Systems has raised $68M across 2 rounds since 2025. Investors include Y Combinator, AlleyCorp and FUSE. Every round with its source.

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

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

# Who invested in *Portal Space Systems*

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

IT Services

Raised 7 months ago

Funding summary Updated 26 Oct 2026

**$68M** raised across 2 rounds since 2025, from 2 sources

**$18M** Seed **$50M** Series A

- **Latest round:** Series A, $50M Apr 2026
- **Step-up i:** 2.9×
- **Investors:** 4

See who backed them

## The funding story

Each circle is a round, placed by date and sized by amount. The line above is the running total.

2026

**$18M** Seed

**$50M** Series A

- **First round:** Seed, $18M
- **Biggest round:** $50M
- **Between rounds:** 12 months

## The rounds

- **Apr 2026** Series A **$50M** *1 new* *3 returning* [Y Combinator](https://millionrounds.com/fund/y-combinator) [AlleyCorp](https://millionrounds.com/fund/alleycorp) [FUSE](https://millionrounds.com/fund/fuse) [Geodesic Capital](https://millionrounds.com/fund/geodesic-capital) Source recorded SEC filing: $61M sold
- **Apr 2025** Seed **$18M** *3 new* [Y Combinator](https://millionrounds.com/fund/y-combinator) [AlleyCorp](https://millionrounds.com/fund/alleycorp) [FUSE](https://millionrounds.com/fund/fuse) Source recorded

## Founders and team

From Portal Space Systems's own website: 7 on the team.

- **Jeff Thornburg** CEO and CTO
- **Ian Vorbach** President and CRO
- **Kimberly Petitt** Executive Assistant to the CEO
- **Mark Bitterman** VP of Government Affairs
- **Prashaanth Ravindran** VP of Engineering
- **Jen Scholten** Director of Marketing & Commercial Business Development
- **Neil Baleva** Supply Chain Director

## Who was in which round

The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.

**Seed** 2025 **Series A** 2026 [Y Combinator](https://millionrounds.com/fund/y-combinator) [AlleyCorp](https://millionrounds.com/fund/alleycorp) [FUSE](https://millionrounds.com/fund/fuse) [Geodesic Capital](https://millionrounds.com/fund/geodesic-capital)

## Everyone who backed them

[Y Combinator](https://millionrounds.com/fund/y-combinator) Accelerator **2** rounds

[AlleyCorp](https://millionrounds.com/fund/alleycorp) Venture studio **2** rounds

[FUSE](https://millionrounds.com/fund/fuse) VC firm **2** rounds

[Geodesic Capital](https://millionrounds.com/fund/geodesic-capital) VC firm **1** round

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

## Quick answers about Portal Space Systems

### Who invested in Portal Space Systems?

Portal Space Systems's investors include Y Combinator, AlleyCorp, FUSE and Geodesic Capital.

### How much has Portal Space Systems raised?

Portal Space Systems has raised $68M across 2 rounds since 2025.

### When did Portal Space Systems last raise?

Portal Space Systems's most recent round was a Series A of $50M in Apr 2026.

### What was Portal Space Systems's biggest round?

Its most recent round, $50M in Apr 2026, is also its largest on record.

### Who backed Portal Space Systems first?

Portal Space Systems's first round on record, in Apr 2025, was backed by Y Combinator, AlleyCorp and FUSE.

### What stage is Portal Space Systems at?

Portal Space Systems's latest named round is a Series A, in Apr 2026.

### Where is Portal Space Systems based?

Portal Space Systems is based in the United States.

## Companies like Portal Space Systems

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

[**Chariot Claims** $23M · Oct 2026](https://millionrounds.com/company/chariot-claims)[**Subeca** $9.0M · Oct 2026](https://millionrounds.com/company/subeca)[**FlexCompute** $53M · Oct 2026](https://millionrounds.com/company/flexcompute)[**Negosh** $3.1M · Oct 2026](https://millionrounds.com/company/negosh)[**StarLifter** $4.0M · Oct 2026](https://millionrounds.com/company/starlifter)[**Litewave.AI** $1.7M · Oct 2026](https://millionrounds.com/company/litewave-ai)

## Find investors like these

Search every investor by what they have actually funded, then narrow to your stage and market. Free.

Open the investor searchOr these rounds in the app