Tamnoon has announced raising $12 million in Series A funding. The round was led by cybersecurity investment firm Bright Pixel Capital, with participation by new investors Blu Ventures and Mindset Ventures as well as existing investors Merlin Ventures, Secret Chord Ventures, Inner Loop Capital, and Elron Ventures.
Pioneering Hybrid HI / AI Intelligence: Tamnoon’s Unique Approach to Cloud Security Remediation
Tamnoon is the first and only hybrid human-AI managed service developed from the ground up specifically for cloud security remediation. Founded by cloud security and AI/ML industry veterans, Tamnoon fuses artificial intelligence (AI) with human intelligence (HI) to provide an expert-guided automated remediation process at scale for the cloud that does not break business operations. Tamnoon reduces cloud exposures and enhances cloud security by optimizing and fortifying prioritization, triage, remediation, and prevention processes, contributing to a more robust and mature Continuous Threat Exposure Management (CTEM) program.
“Neither fully automated nor human-driven cloud remediation approaches alone can address the complexity of cloud security posture management programs. The idea of relying entirely on automation in remediation is not feasible. It is too risky to apply in critical production environments without human oversight,” said Marina Segal, CEO and Co-founder of Tamnoon. “Tamnoon combines our powerful, purpose-built AI technology for cloud remediation, guided by cloud security experts, to safely reduce critical threat exposures to near zero in just months after deployment. We are grateful to our investors, partners, and customers for supporting us in this mission.”
As more organizations shift to the cloud and invest in visibility and cloud risk detection solutions—such as cloud-native application protection platforms (CNAPP) and cloud security posture management (CSPM)—they demand a similarly scalable approach to the remediation process. On average, it takes 145 hours (approximately six days) for a cloud security alert to be resolved; nearly half of organizations see up to 50 misconfigurations per day; and nearly half of cyber security professionals cite a lack of qualified staff as the biggest challenge when protecting cloud workloads. It is becoming essential to gain control over the expanding volume of vulnerability, configuration, and emerging threat alerts for resource-constrained cloud security teams. While the idea of pure auto-remediation is an appealing approach, poorly implemented automation can do more harm than good; modifying production infrastructure without proper testing and oversight can break business operations and cause production outages due to the complexity of cloud infrastructure. That’s why studies show that only 9% of cloud misconfigurations are fixed in real-time with automation today.
Transforming Cloud Security: Dramatic Results and Resource Savings with Tamnoon
With Tamnoon, customers report significant improvements in their cloud security operations, with 90% critical cloud threat exposure reduction within the first 90 days of service, while investing just 10% of the resources they would typically need using traditional professional services. Without Tamnoon, organizations would need to hire up to 10x the amount of cloud security personnel to achieve similar results.
“As an early investor in the high-growth MDR space, we see Tamnoon transforming cloud security in the same way MDR revolutionized the SOC. By integrating powerful AI with expert human oversight, Tamnoon ensures remediations are efficient and minimize the risk of disrupting production environments,” said Marcos de Castro Osório, Investment Director at Bright Pixel. “As workloads move to the cloud and infrastructure grows more complex, visibility alone can overwhelm teams with noise. Tamnoon addresses this by streamlining prioritization and remediation, positioning itself to drive significant market impact in an era where resource efficiency is paramount. We’re excited to partner with the Tamnoon team and support their next phase of growth.”
“Tamnoon addresses a critical market need, automating remediation of cloud security misconfiguration,” said Bill Phelps, Partner at Blu Venture Investors, “Blu Ventures is excited to invest behind Marina and her visionary team.” Tamnoon sits at a critical intersection of cloud security, the highest growth segment in the global security and risk management market. According to Gartner, spending on cloud security is expected to grow 24% in 2024, totaling $7 billion. Scaling security processes, accelerating the mean time to resolution (MTTR) on alerts, and decreasing attack surface, are at the top of the minds of security and risk leaders of companies that have transitioned to the cloud. Customers rely on Tamnoon to prioritize and fix critical and high CNAPP/CSPM alerts, minimize MTTR, and get the full value of their cloud security stack while enabling collaboration between security and DevOps teams.
“Strengthening our cloud security posture is a key business imperative, and Tamnoon’s innovative blend of hybrid human/AI managed service has delivered real, measurable results in a fast and efficient way for our organization,” said Brian DiPietro, Global Chief Information Security Officer at Warner Music Group. “With Tamnoon, we’ve been able to quickly fix misconfigurations and accelerate our cloud security maturity while ensuring operational continuity. This has allowed us to maintain high performance levels while meeting critical KPIs and SLAs.”
What’s Next for Tamnoon: Scaling Innovation and Expanding Our Impact
This new investment brings Tamnoon’s total funding to over $18 million, just under one year after completing its Seed round led by Merlin Ventures and Secret Chord Ventures. Since then, Tamnoon has more than doubled its customer base and now serves organizations across various industries throughout North America, including insurance, entertainment, healthcare, retail and professional services. Committed to building the cloud partner ecosystem to ensure the most comprehensive and effective managed offering, Tamnoon integrates with all leading cloud CNAPP/CSPM solutions.
Tamnoon will be using the funds to accelerate the product roadmap, expand the partnership ecosystem, and continue to drive innovation in managed cloud security remediation. One of the company’s latest patent pending innovations for proactive cloud exposure management — Tamnoon Prevent — is the first in the industry to provide real time prevention of cloud vulnerabilities and misconfigurations by stopping non-secure configurations created in the console from being deployed.
“We have heard directly from our community of CISOs there is a real hunger to meld human intelligence and experience – which cannot yet be replicated or replaced – with AI capabilities that can drive meaningful results,” said Seth Spergel, Managing Partner at Merlin Ventures, the lead investor in Tamnoon’s seed round. “From the beginning, we have believed strongly in Tamnoon’s mission as well as their founding team, and are thrilled to see the company enter this next stage of growth.”
About Tamnoon
Tamnoon is the Managed Cloud Security Remediation service focused on mitigating cloud security risks. A unique fusion of human intelligence (HI) and Artificial Intelligence (AI) technology, that helps cloud security teams to achieve 90% of exposure reduction in 10% of the time and effort, while keeping developers happy. Tamnoon was selected as an RSA Conference Launch Pad 2024 Finalist. Visit Tamnoon at https://tamnoon.io/.
About Bright Pixel
Bright Pixel Capital, formerly known as Sonae IM, is the technology investment arm of the multinational group Sonae. With special focus on cybersecurity, infrastructure software, retail technologies, business applications and emerging tech, it has a portfolio of more than 50 companies, from early to growth stages. Bright Pixel Capital acts as a partner that brings specialized know-how, global footprint, and a wealth of experience in helping companies from early stage to IPO. Find out more at brpx.com.
About Mindset
Mindset Ventures is a global cross-border early-stage Venture Capital firm focused on B2B enterprise software investments in the US and Israel. The firm is renowned for the significant value it brings to its portfolio companies and LPs.
About Blu Ventures
Blu Ventures, a venture capital firm based in Washington, DC, provides strategic funding and expert guidance in Seed to Series A companies in cybersecurity, healthtech, and B2B software startups. Blu leverages the deep domain expertise of its partners—all former operators with extensive industry experience—to empower visionary entrepreneurs. Learn more at www.bluventureinvestors.com.
About Merlin Ventures
Merlin Ventures is the venture capital affiliate of The Merlin Group, a network of companies with more than 25 years of success bringing technologies to the U.S. Government market. Merlin Ventures rapidly scales visionary companies and introduces disruptive solutions designed to help enterprises address today's most critical cybersecurity challenges. Its unique business model combines robust infrastructure and capital, technical advisory and engineering advisory, market readiness acceleration, and deep-rooted government and industry relationships that enable its portfolio to rapidly grow and scale. Learn more at merlin.vc.
About Secret Chord
Secret Chord Ventures is an early-stage venture firm investing in exceptional entrepreneurs building category-defining companies. It seeks to back founders with an evangelical drive towards their mission and nurture close relationships with them based on deep conviction, as friends and trusted advisors. The firm is committed to leverage its experience and broad strategic network from day one to help companies achieve global success. For further information, please visit www.secretchord.vc.
About Inner Loop Capital
Inner Loop Capital is a pre-seed and seed venture capital firm investing in infrastructure software start-ups in cybersecurity, cloud technology, data science, and AI. Inner Loop Capital is based in Baltimore, MD. For further information, please visit innerloopcap.com.
About Elron Ventures
Elron Ventures is a leading early-stage investor dedicated to transforming promising ideas into global industry leaders, with a proven track record of investments and successful M&As worldwide. Specializing in early-stage investments for cybersecurity and B2B software, Elron Ventures is the ideal home for companies in these sectors. For further information, please visit elron.ventures.
