ZeamiCyberSecurity
Category: AI in Cybersecurity
Japanese AI-powered cybersecurity intelligence platform providing browser-native internal attack surface management (IASM), third-party risk management (TPRM), and continuous threat exposure management (CTEM). ZeamiCyberSecurity was founded in 2024. The company is led by Sho Ooi (大井 翔). Based in Tokyo, Japan. Team size: 2-10. Total funding raised: $630K. Latest round: Pre-Series A. Key investors include Abelia Capital, aSTART (エースタート), HENNGE.
- Founded
- 2024
- Headquarters
- Tokyo, Japan
- Team size
- 2-10
- Total funding
- $630K
Value proposition
Browser-native AI security intelligence platform that requires no agents or special hardware — lightweight configuration only. Provides continuous monitoring of internal network assets, external attack surfaces, and third-party risks through a unified intelligence architecture.
Products and solutions
Zeami Intelligence (core AI security intelligence platform), Zeami TPRM (Third-Party Risk Management cloud service), Zeami ASM (Attack Surface Management), Zeami Health Check (ゼアミ健康診断 - security assessment service), LDOC AI Agent (Layered Domain Observation Center AI agent for intelligence gathering)
Unique value
Pure browser-based (純ブラウザ型) security platform — no agents, no dedicated hardware needed. AI-driven threat intelligence that continuously monitors dark web, OSINT, attacker infrastructure, and leaked data to proactively identify risks before they become breaches. Designed specifically for Japanese enterprise security needs with a "Japan-made" approach.
Target customer
Enterprise organizations with multi-site operations, group companies, supply chain partners, and remote work environments. Specifically targeting companies with 1000+ employees in Japan.
Industries served
Enterprise cybersecurity, Supply chain risk management, Internal IT security, Third-party vendor risk assessment
Technology advantage
Pure browser-based architecture (no agents/software needed); AI-powered threat intelligence combining dark web monitoring, OSINT, and attacker infrastructure analysis; Continuous Threat Exposure Management (CTEM) approach; Japan's first dedicated security intelligence organization (LDOC); AI agent integration for automated intelligence gathering
How they differentiate
Unlike traditional security solutions requiring agents or dedicated hardware, ZeamiCyberSecurity's pure browser-based approach enables instant deployment with minimal configuration. Their AI-driven intelligence platform continuously monitors across dark web, OSINT, and attacker infrastructure — not just perimeter defenses. As a Japan-made security product, they address specific Japanese enterprise compliance and supply chain security needs that foreign vendors may not fully cover.
Main competitors
RiskIQ (Microsoft), UpGuard, BitSight, SecurityScorecard, Japanese TPRM/ASM vendors
Key partnerships
HENNGE (strategic investment and business synergy for browser-based security solutions)
Major milestones
Founded March 2024, Seed round ¥40M from Abelia Capital (June 2025), Launched Zeami Intelligence platform (October 2025), Established LDOC (Layered Domain Observation Center) — Japan's first private security intelligence organization (2025), Launched Zeami TPRM beta (November 2025), Pre-Series A ¥50M from aSTART and HENNGE (July 2026)
Market positioning
Early-stage Japanese cybersecurity startup focused on AI-powered threat intelligence and internal attack surface management. Positioned as a "Japan-made" alternative to foreign security vendors, targeting the growing Japanese enterprise market for TPRM and ASM solutions.
Geographic focus
Japan (domestic market focus)
About Sho Ooi (大井 翔)
Ex-Sansan株式会社 Security Engineer (2018-2024); CSIRT, RedTeam, penetration testing, SOC, incident response, security consulting
Official website: https://zeami-cs.com/