ZeamiCyberSecurity
A very early-stage Tokyo startup building a no-install, browser-based continuous threat exposure management service for Japanese enterprises.
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ZeamiCyberSecurity is a Tokyo startup founded in March 2024 that is building a browser-based threat detection and continuous threat exposure management (CTEM) service under the brand Zeami Intelligence. The pitch is that organizations should not need to install specialized agents or software to get visibility into their exposure: the service instead analyzes information it collects alongside publicly available threat intelligence through a proprietary AI algorithm to flag issues and suggest countermeasures.
Strategically, the company is aiming to combine external attack surface management (EASM), internal network visibility (which it calls iASM), and third-party risk management (TPRM) into a single CTEM offering, a consolidation path several larger, better-funded vendors globally are also pursuing. ZeamiCyberSecurity raised a pre-Series A round in July 2026 (reported at roughly ¥50 million, bringing cumulative funding to about ¥90 million, or under $1 million total) led by Acestart Inc. with Japanese SaaS and identity vendor HENNGE K.K. as a follow-on investor.
The company is extremely early-stage: Dealroom describes it as a 10-person team, and its own reporting indicates the core Zeami Intelligence platform is still in development, with a full rollout targeted for autumn 2026. There is no independent evidence yet of the platform’s real-world detection accuracy or customer outcomes, and basic company details (CEO’s name, exact HQ address) are inconsistently reported across Japanese sources.
Innovation Matrix Assessment
The team has moved from founding to a second funding round within about two years, but its flagship Zeami Intelligence platform remains in development with full rollout only planned for autumn 2026.
A no-install, browser-based model that unifies EASM, internal visibility, and third-party risk could meaningfully reduce tooling overhead for smaller Japanese security teams, but this remains a design intent rather than a demonstrated operational outcome.
Total disclosed funding is under $1 million, the team is reported at roughly 10 people, and no enterprise customers have been publicly named; momentum is honestly very limited at this stage.
Consolidating EASM, internal visibility, and TPRM into one CTEM platform follows an industry-wide trend rather than introducing a fundamentally new approach, though the no-agent browser delivery model is a notable implementation choice.
The core product has not yet fully launched, so there is no independent or vendor-reported evidence of real-world detection efficacy to evaluate.
Continuous threat exposure management is a growing, durable priority globally and in Japan specifically as regulatory and ransomware pressure increase, so the underlying problem space remains highly relevant even if this entrant's execution is unproven.
Why CISOs Should Care
For a resource-constrained Japanese security team, a no-install CTEM service promises exposure visibility across external, internal, and third-party risk without deploying and maintaining separate agents or tools.
What Makes It Different
ZeamiCyberSecurity's main structural bet is a browser-based, agentless delivery model combined with consolidating three normally separate disciplines (EASM, internal asset visibility, and TPRM) into one service.
The Matrix Verdict
43/100 — EMERGING / UNRANKED
ZeamiCyberSecurity lands in the Emerging/Unranked tier: a real, verifiably funded company with a sensible strategic thesis, but at a stage (10 people, sub-$1M total funding, pre-launch flagship product) too early for any dimension to be scored on more than directional promise.
Editorial Note: Claims vs. Verified Findings
Japanese-language press coverage disagrees on basic facts such as the CEO's given name and the exact headquarters address; none of the company's detection or coverage claims have independent verification since the core product has not fully launched.
Sources
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