#None #AI Agents #Sublime Security #Email Security

Sublime Security's Major $150 Million Series C Funding

Sublime Security has made headlines by securing a significant $150 million in Series C funding, led by Georgian. This move is poised to catapult the company into the next phase of its expansion, building on its already robust framework of AI-driven email security solutions.

The recent investment marks an important milestone for the company that has revolutionized email protection strategies with its innovative agentic AI approach. Unlike traditional security systems that offer a one-size-fits-all solution, Sublime's platform employs specialized AI agents that operate autonomously to protect, triage, and adapt defenses for email security in real-time.

The funding comes less than a year after Sublime's Series B round, reflecting a burgeoning demand for its AI-native solutions. As email threats such as phishing become increasingly sophisticated due to the capabilities of generative AI, the need for adaptive security mechanisms has never been greater.

Adapting to a New Threat Landscape

According to CEO and Co-founder Josh Kamdjou, adversaries have constraints similar to those of defenders, including budgets and time. The landscape is changing, with AI enabling attackers to execute more complex schemes with less effort. In response, Sublime Security has engineered a cutting-edge platform that empowers security teams with the resources to tackle these challenges. The focus is on providing autonomous defense systems that not only detect real threats but also adapt dynamically, keeping pace with adversaries.

As part of the Series C funding, Sublime plans to further enhance its AI capabilities, building out a framework that allows security teams to spend less time managing threats and more time focusing on their organization's specific requirements. This agile approach opens up transformational possibilities in email security, setting Sublime apart from its competition.

Russell Moore, a Partner at Georgian, emphasized how Sublime's innovative use of agentic AI redefines combat strategies against adversaries. The company is dedicated to establishing a higher standard of proactive, programmable defenses that combine precision, speed, and insightful transparency compared to conventional methods.

Record Growth and Customer Retention

This latest funding comes on the heels of a remarkable growth period for Sublime, which has launched two groundbreaking AI agents within the past six months. These agents are designed to streamline critical security tasks: the Autonomous Security Analyst (ASA) investigates and triages threats in mere seconds, relieving teams from manual assessments, while the Autonomous Detection Engineer (ADÉ) can deploy personalized defenses against new threats in hours, thereby eliminating bottlenecks in the security review process.

Due to such remarkable innovations, Sublime has experienced a 100% increase in annual recurring revenue over the first half of 2025. The company has also attained a perfect record in customer retention, with all enterprise clients—including industry giants like Spotify, Zscaler, and British Gas—staying loyal since the company's inception.

Dmitri Alperovitch, the Co-founder and former CTO of CrowdStrike, remarked on Sublime's disruptive nature in the email security landscape, noting that its capacity to continuously develop new agentic AI functionalities places it ahead of traditional solutions.

In the words of Indu Sajeev, Chief Information Security Officer at ASOS, the adaptability of the platform to evolving threats has been invaluable for their team, allowing them to mitigate risks with significantly decreased manual input.

Moving forward, Sublime intends to leverage the new funding to enhance its platform further and expand its international footprint, intensifying its efforts to combat evolving cyber threats.

As Sublime Security continues to redefine the boundaries of email security with its autonomous platform, the conversation around innovative threat defense systems is more critical than ever. With the rapid pace of technological advancement in AI and the escalating complexity of email threats, organizations can no longer afford to rely on outdated security measures. Sublime represents a forward-thinking solution aimed at providing robust, effective, and real-time defenses for businesses worldwide.

For more details, visit Sublime Security.