Seal Security, a provider of application security solutions specializing in securing open-source components, has raised $13 million in a Series A funding round. This new investment brings the company’s total funding to $20 million. The funding round was led by Vertex Israel, with participation from Crew Capital, More Investments, SBI Group, and CCL.
Seal’s platform is designed to secure software supply chains by providing production-ready patches that protect applications, operating systems, and container base images without requiring version upgrades. The company has experienced significant growth in its customer base and annual recurring revenue (ARR), resulting in a doubling of its headcount over the past year.
Seal Security’s solutions help organizations resolve critical vulnerabilities within hours or minutes, providing an industry-leading 72-hour remediation Service Level Agreement (SLA). The platform is designed to address core challenges faced by security and development teams, including vulnerability backlogs and legacy codebases, while also ensuring compliance with standards such as PCI DSS, FedRAMP, and DORA.
How the funding will be used: The new funding will be used to enhance the company’s go-to-market efforts and accelerate the expansion of its core platform.
KEY QUOTES:
“Modern development moves faster than ever, and traditional AppSec solutions can’t keep up. At Seal, we believe the security of the code we build should be accelerated by LLMs, rather than having it exponentially grow our vulnerability backlog. This investment, along with the increased customer demand, validates the demand for our patching-first approach, empowering teams to automatically fix vulnerabilities, maintain compliance, and deliver secure software without altering their workflow.”
Itamar Sher, CEO of Seal Security
“Seal is emerging as the de facto remediation layer for open source and container environments, in a market that’s rapidly shifting from passive detection to automated, scalable remediation. Leading global cyber companies and highly regulated enterprises are already relying on Seal to eliminate vulnerability backlogs, maintain compliance, and secure even legacy systems without code rewrites or production disruptions. CISOs aren’t just adopting Seal; they’re embedding it into their core AppSec strategy. Seeing the depth of customer impact and the team’s ability to execute at scale, we’re proud to deepen our partnership. Seal isn’t just meeting the need, it’s shaping the future of secure software delivery.”
Tami Bronner, General Partner, Vertex Ventures Israel
