|
Sublime Security Raises $20M Series A Led by Index Ventures to Redefine Email Security
Thursday, May 2, 2024
Investment accelerates commitment to securing cloud email environments with advanced protection, visibility, and control
WASHINGTON, April 24, 2024 /PRNewswire/ -- Sublime Security, the AI-powered, programmable email security platform, announced today that it has raised $20 million in Series A funding, led by Index Ventures with participation from previous investors Decibel Partners and Slow Ventures. Cybersecurity visionary and Crowdstrike Co-founder & former CTO Dmitri Alperovitch is also joining the investment round and Board of Directors. The added funding will be used to further invest in the platform and improve the customer experience. In a rapidly evolving threat landscape, email remains a top security concern for businesses. Sublime gives security teams the ability to detect and prevent these attacks with out-of-the-box protection and unprecedented visibility into their cloud email environments, with additional controls for customized detections, attack surface reduction, threat hunting, and more.
Increasing financial impact
According to the most recent 2023 FBI Internet Crime Report, Business Email Compromise (BEC) accounted for over $2.9 billion in losses, although the actual number is likely much higher due to underreporting. The volume and scope of attacks are escalating as bad actors deploy large language models (LLMs) to wage advanced and varied malicious attacks that include BEC, QR code phishing, extortion, malware/ransomware, fraud, spam, and more.
Email security that's not a black box
Email security has traditionally been driven by vendors that offer black box, one-size-fits-all solutions. However, security teams can no longer afford to wait weeks or months for vendors to address false positives or missed attacks, during which time legitimate emails continue to get blocked and the same attack campaigns continue to land successfully.
As the email threat landscape continues to evolve rapidly, defensive tools must be equally adaptable. Sublime's AI-powered detection engine gives teams visibility, transparency, and ultimately control to protect their organizations against complex email-borne attacks, unlike the traditional black box approach.
"On the offense, Generative AI enables attackers to rapidly create diverse, sophisticated campaigns at scale, but on the defense, it's a powerful tool for automated detection, triage, and explainability," said Josh Kamdjou, Founder and CEO of Sublime Security. "The Sublime Platform is a modern take on email security that delivers immediate out-of-the-box protection, with the added ability for teams to tailor email security controls to fit organizational needs and benefit from community-driven protections as the threat landscape evolves."
Historically, defenders have had difficulty exercising meaningful control or collaborating within the email domain due to a lack of tooling and common language for expressing complex attacker behavior. Sublime's Core Detections are open source on GitHub where anyone can contribute to and benefit from new protections against the latest threats. Advanced teams that want granular control to tailor detections, create exclusions, or mitigate false positives for their organization also have access to Sublime's detection engine with a purpose-built domain-specific language (DSL), Message Query Language (MQL), which works universally across Microsoft 365 and Google Workspace via API integrations.
Kamdjou spent 10 years at the Department of Defense engaged in various offensive cyber initiatives and also worked in the private sector as a red teamer. Email phishing was always the easiest way for him to gain initial access to a system, and he set out to build a product capable of stopping him. Co-founder and COO Ian Thiel was an early team member at Optimizely and most recently led growth at Alto. The team publicly launched Sublime in February 2023 and the platform is already experiencing significant demand and impressive traction, with customers including some of the world's top security teams at Spotify, Ramp, Vanta, Brex, Centrica, and others.
"Email security has become a high priority for businesses as they face GenAI-powered attacks, and we believe that Sublime's impressive technology, the founders' backgrounds, and their unique go-to-market strategy put them in a strong position to tackle this problem," said Jahanvi Sardana, Partner at Index Ventures. "Sublime is pioneering a bottoms-up, security practitioner-led approach that promotes community-driven collaboration, and given the massive market opportunity for email security, we are excited to see Sublime continue its trajectory of hyper-growth."
In addition to the funding, Sublime is also announcing the launch of Attack Score, its latest feature that uses transparent, explainable machine learning to prioritize email threats. Attack Score aids security analysts in quickly understanding and prioritizing detected threats based on the detailed context of observed attack indicators. Security teams have full control over Sublime's Attack Score output, enabling them to combine it with other logic using detection-as-code.
Sublime's Core Platform can be self-hosted for free at any scale, and the first 100 inboxes are also free in Sublime's hosted SaaS environment. For more information, visit: https://sublime.security/
About Sublime:
Sublime is the AI-powered, programmable cloud email security platform that detects and blocks attacks like Business Email Compromise (BEC), malware/ransomware, credential phishing, and more. The open platform enables security teams to have better visibility and control over their email environment, customize and tailor the platform to suit their unique needs, and collaborate with their peers against novel attacks to reduce risk and prevent email-borne incidents. The company was co-founded by Joshua Kamdjou and Ian Thiel in 2019 with funding from investors including Index Ventures, Decibel Ventures, and Slow Ventures. Deploy a free, self-hosted Core version of the platform or Sublime Enterprise at https://sublime.security/start
View original content to download multimedia:https://www.prnewswire.com/news-releases/sublime-security-raises-20m-series-a-led-by-index-ventures-to-redefine-email-security-302126119.html
SOURCE Sublime Security
|
|
|
|
|
|
 |
Weekly Recap: 11 Tech Press Releases You Need to See | Jan 22, 2026
|
|
Sup AI Sets New Benchmark Record with 52.15% on Humanity's Last Exam | Jan 22, 2026
|
|
DEADLINE ANNOUNCED FOR 2026 NEW TOP-LEVEL DOMAIN APPLICATIONS | Jan 22, 2026
|
|
Trigent Partners with WeWork India to Expand its GCC Footprint | Jan 22, 2026
|
|
Skunk Works® and XTEND Expand Joint All Domain Command and Control for Advanced Mission Execution | Jan 22, 2026
|
|
Exia Labs Brings Keystone to the U.S. Navy via DIU's Blue Object Management Challenge | Jan 22, 2026
|
|
Altair HyperWorks 2026 Delivers Design and Simulation at Scale with AI | Jan 22, 2026
|
|
Glasswall Brings Defense-Level File Sanitization to Every Government Agency and Business Using Microsoft 365 | Jan 22, 2026
|
|
Buyers Edge Platform Appoints Jaime Selga to Lead Expansion Across the Middle East, Africa & Asia | Jan 22, 2026
|
|
Genpact Named a Leader in ISG Provider Lens(TM) 2025 for Insurance GCCs and Agentic AI Services | Jan 22, 2026
|
|
|
|
