Fundraising Fox
Spencer Tall
InvestorManaging Director at AllegisCyber Capital · Managing Director at ALLEGIS CAPITAL
San Francisco Bay Area
Writes $3M – $5M checks · typically $4M
Find your path to Spencer
Sign up to see every warm intro you have to Spencer
- Paths you didn't know you had: your email and LinkedIn already hold routes to Spencer. We find them for you
- 2nd- and 3rd-degree connections: the friend-of-a-friend routes that take hours to manually find through your inbox or LinkedIn
- Answers now, not in days: momentum is everything in a raise. Skip asking around whether someone knows someone
Days of research, done the moment you sign in, with every route ranked by how warm it is.
About
Spencer Tall advocates secure browser adoption and microsegmentation, emphasizing browsers as the primary ransomware/malware vector and favoring pragmatic, people-centric architectures and tools that automatically detect and isolate suspicious activity.
Contact· self-published, not guessed
Invests in
AI & Machine LearningCybersecurityData & InfrastructureEnterprise SoftwareSaaS
Deals · 4
ConcealBoard seat
via AllegisCyber Capital · filed Nov 2025 · $26.7M raise
PolygrafBoard seat
via AllegisCyber Capital · filed Oct 2025 · $9.5M raise
Social SafeGuard, Inc.Board seat
via AllegisCyber Capital · filed Jun 2020 · $3.5M raise
Lucidworks, Inc.Board seat
via AllegisCyber Capital · filed Nov 2015 · $15M raise
Attribution from SEC filings, press coverage, and firm rosters.
Other disclosed investments
Board seats
Investor
AvaLAN Wireless SystemsElisityhealthŌmeIMVUMaritzCXMokiMyAssociationPrevailionSafeguard CyberSolera NetworksSymplifiedSynack
Sources: SEC Form D filings · curated public sources.
Colleagues at AllegisCyber Capital
Network3
Investors connected to Spencer in public investor directories — a warm-intro map.
Frequently asked questions
- Who is Spencer Tall?
- Spencer Tall advocates secure browser adoption and microsegmentation, emphasizing browsers as the primary ransomware/malware vector and favoring pragmatic, people-centric architectures and tools that automatically detect and isolate suspicious activity.
- Where does Spencer Tall work?
- Spencer Tall is Managing Director at AllegisCyber Capital and Managing Director at ALLEGIS CAPITAL.
- What does Spencer Tall invest in?
- Spencer Tall invests in AI & Machine Learning, Cybersecurity, Data & Infrastructure, Enterprise Software, SaaS.
- What check size does Spencer Tall write?
- Spencer Tall typically writes checks of $3M – $5M.
- What boards does Spencer Tall sit on?
- Spencer Tall holds tracked board seats at Conceal, Lucidworks, Inc., Moki, Polygraf, Social SafeGuard, Inc..
- What companies has Spencer Tall invested in?
- Investments tracked here include AvaLAN Wireless Systems, Conceal, Elisity, healthŌme, IMVU, Lucidworks, Inc., MaritzCX, Moki, MyAssociation, Polygraf, Prevailion, Safeguard Cyber, and 3 more.
About this profile. Compiled from public sources — AllegisCyber Capital's own website, regulatory filings and public professional profiles — and summarised by Fundraising Fox; every fact is kept with where it came from. Spotted an error, or would rather not be listed? Email privacy@fundraisingfox.com · How we build profiles · Your rights