Organization · Venture Capital
First In
First In is an early-stage venture capital firm based in the US, focusing on investments in cybersecurity, defense technology, and data intelligence. The firm supports mission-driven founders and emphasizes unique technologies that address significant challenges in national security and commercial markets.
Overview
What First In does
What First In is
First In is an early-stage venture capital firm based in the US, focusing on investments in cybersecurity, defense technology, and data intelligence. The firm supports mission-driven founders and emphasizes unique technologies that address significant challenges in national security and commercial markets.
How it participates in the startup ecosystem
The current public profile supports funder capabilities. Each capability below is shown separately so organization identity and role-specific information do not get conflated.
Operational profile
Organization status and context
Organization status describes the entity itself. Funding and program availability appear within the relevant capability profile.
- Operational status
- Active
- Organization type
- Venture Capital
- Founded
- Founded in 2020
- Approximate age
- About 6 years
- Structured capabilities
- Funder
- Last reviewed
- April 23, 2026
Official channels
Find First In elsewhere
Open the official website or a supported primary organization account.
Capability profile
First In as a funder
Investment thesis
First In employs a 'Systemic Security Investing' framework, focusing on interconnected domains of cybersecurity, defense technology, and data/intelligence to support innovative solutions addressing national security challenges.
Focus narrative
First In primarily invests in cybersecurity, defense, and data companies, focusing on the seed stage of development. The firm partners with emerging security technology companies that tackle significant challenges faced by both commercial and government enterprises, emphasizing unique and protectable technologies led by experienced founding teams.
Value beyond capital
First In adds value to its portfolio companies by leveraging its deep expertise in security technology and access to a network of industry contacts. The firm frequently leads seed rounds and provides strategic guidance to help companies navigate the complexities of the security landscape.
Terms and economics
- Typical check
- $500,000–$5,000,000
Focus and fit
- Stages
- Pre-seed · Seed · Seed+
- Sectors
- CybersecurityDefence Tech
- Regions
- United StatesNorth America
Availability
- Currently deploying
- Yes
Portfolio and track record
- Recorded notable exits
- Adlumin
Portfolio context
First In's notable portfolio includes companies such as Adlumin, a cybersecurity platform acquired by N-able; Castelion, specializing in hypersonic missile systems; and Shift5, which focuses on operational technology security for defense platforms. Other investments include Tidal Cyber, Immuta, and Phylum, among others.
Common questions
What to know about First In
Upseed classifies First In under the Venture Capital organization type. Its current public profile includes funder capabilities.
Source and update disclosure
Know what this page is based on
Source basis
Public organization and program material, official websites, and structured Upseed records.
Last reviewed
April 23, 2026
Known limits
Capability profiles appear only when a structured public profile also contains decision-useful role evidence. Terms and availability can change.
Upseed is an independent guide. It is not affiliated with or endorsed by the organization described on this page.