The Blackwall funding round has raised $100 million, valuing the Estonian cybersecurity company at $2.2 billion. The investment quadruples its 2025 valuation as demand grows for tools that protect websites from malicious bots and AI-generated traffic.
AVP led the Series C, with participation from Dawn Capital, MMC Ventures, and Tera Ventures. Executive chairman Roi Carthy said the company’s valuation had increased fourfold since its previous funding round.
Blackwall Funding Round Supports Web Security Expansion
Unlike traditional cybersecurity providers that sell directly to businesses, Blackwall focuses on web hosting, cloud and managed service providers. These partners integrate its technology into their infrastructure and offer security services under their own brands.
Co-founder and CEO Nikita Rozenberg said providers can combine different protection tools, set their own prices and share revenue with Blackwall. The company offers free traffic visibility tools but charges for protection services.
Its platform includes DDoS protection, threat intelligence, certificate management and traffic routing. Blackwall also examines incoming requests to distinguish legitimate visitors and authorized AI agents from malicious automation.
The company uses digital fingerprinting to identify software generating requests. Its AI models also analyze traffic behavior and intent, helping providers determine whether an automated request is legitimate or potentially harmful.
AI Agents Create New Challenges for Website Security
Web infrastructure providers face growing volumes of automated traffic, including scraping bots, malicious requests, and AI agents. These systems can generate significant workloads even when their activities are not intentionally harmful.
The challenge is increasingly about distinguishing authorized automation from abuse. TechAmerica.ai recently examined how AI agents run into website restrictions when security systems cannot reliably distinguish legitimate activity.
Cloudflare is developing similar controls. Its AI Crawl Control service lets website operators allow or block individual AI crawlers, with paid access options under development. The company has also introduced broader AI crawling restrictions intended to give publishers greater control over automated access.
Blackwall takes a different commercial approach by letting hosting providers manage these services themselves. Rozenberg believes demand will rise as AI agents begin completing transactions and making purchases on users’ behalf
Those activities could require additional controls to verify agent identities, authorize access and manage payments securely.
Blackwall plans to use its new funding to expand across North America, Europe, Asia-Pacific and the Middle East. The company also intends to develop additional security capabilities for hosting and cloud providers.
Its growth strategy depends on helping infrastructure companies manage increasingly complex web traffic while retaining control of their customer relationships.
