Fundz

SubImage raises $4.2M in seed funding from FundersClub, Y Combinator, Phosphor Capital, and Transpose Platform to enhance cloud security solutions.

PRIVATENov 17, 2025

Amount Raised

$4.2 Million

Round Type

Seed

San FranciscoArtificial IntelligenceSecurityCyber Security

Investors

FundersclubTranspose PlatformPhosphor CapitalY Combinator

Description

SubImage has announced the closure of a $4.2M seed funding round. The funding will be used to grow its engineering team and expand customer pilots. SubImage aims to deliver features that reduce the time needed to address security issues. The investment round included notable backers such as FundersClub and Y Combinator.

Quick answer

SubImage raised $4.2 Million in a Seed round, dated November 17, 2025. Investors: Fundersclub, Transpose Platform, Phosphor Capital and Y Combinator. SubImage is based in San Francisco, California, United States.

How much did SubImage raise?
SubImage raised $4.2 Million in a Seed round on November 17, 2025.
Who invested in SubImage?
Fundersclub, Transpose Platform, Phosphor Capital and Y Combinator are named as investors in this round.
What does SubImage do?
SubImage is the first company to bring an open-core cloud security graph to the enterprise.
Where is SubImage based and how big is it?
SubImage is based in San Francisco, California, United States. Fundz records about 5 employees.
Who are the decision-makers at SubImage?
Fundz holds 1 contact at SubImage. Names and contact details are shown to Fundz members.

Source: Fundz verified event record.

Who else raised in Security and Cyber Security around the same time

Companies in the same sectors as SubImage that raised within 45 days of this round, from Fundz verified event records.

  • Adaptive Security raised $81M (Series B) on December 16, 2025.
  • CurlSek raised an undisclosed amount (Angel) on December 15, 2025.
  • Cyphlens raised $3.8M (Seed) on December 11, 2025.
  • Prime Security raised $20M (Series A) on December 9, 2025.
  • Helmet Security raised $9M (Funding Round) on December 4, 2025.
  • 7AI raised $130M (Series A) on December 4, 2025.

Who to call at SubImage, and when

A new round usually means SubImage is about to hire and buy. The teams that reach out first get the meeting.

  • An alert the day SubImage raises, hires an executive or expands, scored against what you sell
  • The decision-makers there, with verified emails
  • Who you already know at SubImage, from your own LinkedIn network

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Company Information

Company

SubImage

Location

San Francisco, California, United States

About

SubImage is the first company to bring an open-core cloud security graph to the enterprise. It maps your entire infrastructure so you know exactly what’s exposed, misconfigured, or needs attention first. Security teams use SubImage to fix vulnerabilities, identify ownership, and respond to incidents faster. Developed by the team behind Lyft's Cartography open source project, SubImage is focused on bridging the gap between visibility and action in cloud security.

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