Blackwall Raises $100M at $2.2B Valuation to Help Hosting Providers Manage Bot Traffic
Estonia-based Blackwall has raised $100 million in Series C funding at a $2.2 billion valuation, quadrupling its valuation as it expands tools for hosting providers to filter bot and AI-agent traffic.
AVP led the round, with participation from existing investors Dawn Capital, MMC Ventures and Tera Ventures, Blackwall said. Executive chairman Roi Carthy told TechCrunch that the round increased the company's valuation by four times since the 2025 fundraise.
Blackwall sells its tools through hosting, managed service and cloud providers rather than directly to websites. Co-founder and CEO Nikita Rozenberg told TechCrunch that providers can mix and match security components, set prices for their own customers and share a cut of the revenue with Blackwall. The company initially gives customers a free tier that shows the traffic and threats hitting their network, then charges for protection and tools to address those threats.
Blackwall provides threat intelligence, certificate management, DDoS protection and traffic routing. It also examines web traffic to distinguish actual visitors and legitimate AI agents from malicious bots, intruders and disruptive requests. Rozenberg said the company uses digital fingerprinting to identify the software sending a request and its own AI models at customers' endpoints to analyze the intent and behavior of incoming requests, separating a person's legitimate request from a malicious bot.
Web infrastructure companies including Cloudflare, Akamai, Imperva and Blackwall are dealing with DDoS attacks, scraping, botnet farms, malicious requests and AI agents going rogue. Cloudflare's AI Crawl Control lets website owners allow or block individual AI crawlers and offers an option to charge them for access. Rozenberg argues that Blackwall's advantage lies in letting hosting providers offer such traffic management services themselves instead of handing the customer relationship to another security provider.
Rozenberg said he sees a large opportunity as AI agents begin interacting and transacting with websites on behalf of their users, which should eventually require systems to manage which agents get access, on what terms and how they are authorized to make payments.
Blackwall plans to use the funding to expand its operations across North America, Europe, Asia-Pacific and the Middle East and to develop more security tooling for hosting, cloud and managed service providers.