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Shadow Networks

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Privately-held company led by an experienced management team comprising former

Santa Clara, CubaFounded 2010Semiconductors
Valuation $0–100M Latest valuation · 2015
Headcount <100 Current team size
Total funding $10–50M Disclosed equity funding
Unlock exact values This page shows ranges. Dealroom has the exact numbers for Shadow Networks and the history behind them.

About Shadow Networks

Shadow Networks, Inc. operated as a provider of advanced threat detection services, focusing on the enterprise and government sectors. Founded in 2010 by Eric Winsborrow, the company was initially known as Zanttz. Winsborrow, who served as CEO, has an extensive background in the high-technology sector, with executive roles at major security and networking companies including McAfee, Symantec, and Cisco. This experience shaped the company's approach to cybersecurity, which was centered on combating threats that had already infiltrated a network's perimeter.

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The company's core business was providing active threat deception solutions. Its technology was built upon patented virtualization and software-defined networking (SDN) principles to create "shadow networks." These were essentially decoy systems designed to look and behave like real components of a client's network. The purpose was to lure attackers who had already bypassed traditional defenses, allowing Shadow Networks to observe, record, and analyze their methods without putting the client's actual assets at risk. This approach assumed that sophisticated attackers were already inside the network and focused on deception and disruption as the primary mitigation strategy. The business model targeted demanding and security-sensitive organizations, including entities like the US Department of Homeland Security and the Office of the Secretary of Defense.

Over its history, the company secured approximately $16.2 million in funding over several rounds, including a significant Series A round in March 2015 that raised $13.6M. Key investors included Rho Canada Partners, Paladin Capital Group, and angel groups like Alliance of Angels and Keiretsu Forum. In February 2016, Shadow Networks was acquired by Acalvio, a competitor in the threat deception space, marking its exit as a venture-backed entity.

Source: Dealroom company data

At a glance

Status
Acquired
Founded
2010
Headquarters
Santa Clara, Cuba
Employees
3
Open positions
None listed
Dealroom signal
54.2/100
Industry
Semiconductors
Sector
Semiconductors, Hard Tech, DT and LS, science-based
Technology
Deep Tech
Client focus
b2b

Latest news

Press, funding announcements and product moves mentioning Shadow Networks.

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Funding history

4 recorded events

Company financing events and reported valuations.

Deal typeDateAmountValuationInvestorsSource
ACQUISITIONExit Feb 2016 $0 Acalvio Technologies
DEBTDebt Aug 2015 $1.4M Undisclosed
Showing the latest 2 of 4 recorded eventsBook a demo for the full funding history →

Growth signals

Shadow Networks website traffic

Latest recorded traffic for Shadow Networks is 0 monthly website visits. Shadow Networks's team grew 0% over the past year.

Latest monthly visits0 1-year team growth0%
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Investors

6 investors on the cap table

From Dealroom's funding and investor records, grouped by the round each investor first entered.

Series A3 investors entered at this stage

  • Yaletown Partners
  • Rho Canada Ventures
  • Paladin Capital Group

Series B and later2 investors entered at this stage

  • David Arnsdorf
  • Alliance of Angels

Other known investors1 additional known investor

  • Acalvio Technologies
Team profiled 5 named & role-tagged
Founders Hidden — book a demo/100 quality score
Key operators 3 quality Hidden — book a demo/100
Potential founders Hidden — book a demo likely future founders
Startup mafia Hidden — book a demo alumni-founded startups
Talent movements Hidden — book a demo in · Hidden — book a demo out past 12 months

Source: Dealroom Talent Intelligence.

Global footprint

Workforce and web traffic by country
Workforce by country
🇨🇺 Cuba · Santa Clara HQ
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Market sentiment

Posts on X, past 7 days

An AI-synthesised read of the highest-engagement posts about Shadow Networks on X, ranked by likes and reposts, corporate channels excluded.

Reading the room on X — pulling top posts and synthesizing themes…

Source: X recent search ranked by engagement (likes + retweets) · Synthesis by Claude · Cached for 1 hour

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