Cybersecurity startup Echo has raised $35 million in a Series A funding round, taking its total funding to $50 million less than six months after announcing its seed investment.
The latest round was led by N47, with participation from Notable Capital, Hyperwise Ventures and SentinelOne’s S Ventures. The rapid follow-on funding highlights growing investor confidence in Echo’s approach to tackling vulnerabilities in cloud-native environments.
Based in Tel Aviv, Echo develops AI-driven technology designed to eliminate security vulnerabilities at their source by rethinking how container images are built and maintained. The company uses autonomous AI agents to create Docker images that are free from known common vulnerabilities and exposures (CVEs).
Echo’s approach focuses on stripping open-source container images of non-essential components, significantly reducing the attack surface while preserving full functionality. These hardened images are designed as drop-in replacements for standard Docker images and can be adopted by changing a single line of code in a Dockerfile, according to the company.
Beyond building images from scratch, Echo’s AI agents continuously maintain them as new security flaws emerge. When a vulnerability is disclosed, the agents automatically research the issue, identify which images are affected from a library of more than 600, source or develop fixes, apply patches, run compatibility tests and generate pull requests.
Founded in 2025 by Eilon Elhadad and Eylam Milner, Echo builds on the founders’ previous experience in the cloud security space. Elhadad and Milner previously founded Argon, which was acquired by Aqua Security. Echo raised $15 million in seed funding earlier this summer before closing its Series A round.
“Large organisations with thousands of cloud services inherit millions of security issues before their engineers write a single line of code,” said Milner, who serves as Echo’s chief technology officer, noting that the majority of container vulnerabilities originate in base images.
Echo claims its solution delivers immediate impact for customers by removing inherited vulnerabilities as soon as its images are deployed.
“Our time-to-value is instant, with customers immediately seeing their vulnerability count drop to zero when moving to Echo images,” said Elhadad, the company’s chief executive.
The new funding will be used to accelerate product development, expand Echo’s AI capabilities and support growing demand from enterprises seeking to reduce cloud security risk without slowing down development teams.
