Portal Space Systems

Portal Space Systems

Private
Bothell, WashingtonFrontier & Industrial Techhttps://www.portalsystems.space/

Last Round

Series A

Mar 26, 2026

Est. Valuation

$250M

Total Funding Raised

$67.5M

Momentum Score

100 /100

Company Overview

Portal Space Systems is an aerospace and defense company that provides space maneuverability services with its Supernova spacecraft, which is powered by a novel solar-thermal propulsion system.

Sector

Frontier & Industrial Tech

Verticals

Space Technology, Defense Tech, Freight & Transportation

Business Model

B2G

Customer Profile

Government Contracts, Hardware Sales

AI Layer

Non-AI

Keywords

solar thermal propulsionSTPspace tugorbital transfer vehicleOTVin-space mobilityin-space logisticssatellite busspace domain awarenessSDAsatellite servicingcislunar logisticsspacecraft manufacturingon-orbit servicingsatellite life extensionspace debris removal

Historical Pricing

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Caplight Momentum Score

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Portal Space Systems Comps

Public and private peers based on sector, stage, and business model.

CompanyStatusEst. ValuationRev Multiple
OpenAIPrivate$86.0B~40x
CoherePrivate$5.0B--
Competitor 1Public$XX.XBXXx
Competitor 2Public$XX.XBXXx

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Portal Space Systems Funding Rounds

Historical fundraising activity

RoundDateAmount RaisedValuationInvestorsSources
Series AMar 26, 2026
SeedApr 3, 2025
Series AApr 9, 2024

Key People

Founding team and executive leadership

Ian Vorbach

Co-Founder, COO

Founding Team

Jeff Thornburg

CEO Co-founder

Founding Team

Portal Space Systems Investors

Notable investors and investment history

InvestorRounds
AtypicalSeed
Geodesic CapitalSeries A
AlleyCorpSeries A, Seed
Offline VenturesSeed
Trajectory VenturesSeries A
First InSeed
Booz Allen VenturesSeries A

Market signals

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  • Apr 19, 2026

    Grew 33% QoQ from 21 to 28 employees.

  • Apr 16, 2026

    Monthly visitors grew 75% MoM, from 4.6K to 8K.

Portal Space Systems Filings

SEC and related filings with document metadata.

TypedDateAmount OfferedAmount SoldFillingPagesDownload
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Portal Space Systems Filings

SEC and related filings with document metadata.

Frequently Asked Questions

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Firmographic Details

HeadquartersBothell, Washington
Employee Range28
Year Founded2021
Last FundingMar 26, 2026

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