Realm.Security, an AI-native cybersecurity company, has secured new funding as it closes out 2025 with rising global interest in its technology.
The firm has raised $2m from Presidio Ventures, the corporate venture arm of Sumitomo Corporation. Sumitomo, a Japanese-headquartered global trading group with a 400-year history, oversees a wide range of subsidiaries, including SCSK, which delivers managed IT and cybersecurity services to more than 8,000 enterprise clients.
Realm.Security specialises in building AI-driven infrastructure that helps security teams sort, filter and manage vast volumes of security data. Its platform is designed to ease the strain on overstretched internal teams that increasingly struggle with data overload, escalating storage costs and the operational complexity of modern cyber environments.
The company plans to use the new funding to accelerate its expansion across the Asia-Pacific region by working with channel partners and strengthening its executive leadership. Realm.Security sees significant potential in Japan, where many organisations outsource their security operations and face growing shortages of cybersecurity talent.
In recent months, the firm has been recognised as an “Emerging Leader” in the SDPP category by analyst group SACR and has earned a 2025 BostInno Fire Award as one of the region’s most impactful early-stage companies.
Its platform has already demonstrated measurable results: Vensure Employer Solutions reported an 83% reduction in firewall log volumes, generating annual savings of $250,000. Realm.Security has also expanded rapidly, increasing its global workforce by 250% this year and announcing new senior hires, including Holly Cappello as chief revenue officer and Colin Jermain as vice president of data science.
Realm.Security CEO Pete Martin said, “We’re excited to bring on Presidio Ventures as a strategic investor as we meet rising global demand for our platform from security teams who are drowning in data noise and facing spiraling storage and compute costs.” He added, “This investment caps an impressive first full calendar year for Realm, and we believe Sumitomo’s deep connections will help us enter the Asia-Pacific market and scale quickly in 2026. The region is now the third-largest cybersecurity market globally, and Japan is a particularly compelling entry point for our channel-led strategy, given that many enterprises there outsource their Security Operation Centers.”
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