Estonia-based Blackwall said Tuesday it raised $100 million at a $2.2 billion valuation. The company builds web traffic security tools for hosting providers as websites deal with growing volumes of bots and AI agents.
AVP led the Series C, with existing investors Dawn Capital, MMC Ventures and Tera Ventures participating. Executive chairman Roi Carthy told TechCrunch the valuation is four times what it was at Blackwall’s previous fundraise in 2025.
Hosting providers sell the tools to clients
Blackwall sells through web hosting, managed service and cloud providers rather than directly to websites. Providers can customize its tools, offer them under their own brands and keep control of their customer relationships.
Co-founder and CEO Nikita Rozenberg told TechCrunch that providers can choose security components, set prices and share revenue with Blackwall. A free tier shows the traffic and threats hitting a customer’s network. Blackwall charges for protection and other tools to address those threats.
Blackwall sorts visitors from bots
The company offers threat intelligence, certificate management, DDoS protection and traffic routing. It also examines traffic to distinguish real visitors and legitimate AI agents from malicious bots, intruders and disruptive requests. Rozenberg said digital fingerprinting can identify software sending a request, such as Microsoft Office or Codex. Blackwall also uses its own AI models at customer endpoints to assess requests’ intent and behavior.
That work puts Blackwall in a market that also includes Cloudflare, Akamai and Imperva. Web infrastructure companies face DDoS attacks, scraping, botnets, malicious requests and AI agent traffic. Cloudflare’s AI Crawl Control already lets website owners allow or block individual AI crawlers and offers an option to charge them for access.
Read nextTenstorrent raises $1.5 billion at a $6.2 billion valuationRozenberg expects websites will eventually need ways to decide which AI agents can access them, on what terms, and how those agents can make authorized payments. He argues that Blackwall’s provider-focused approach lets hosts offer traffic management while retaining their customer relationships.
Blackwall plans to use the funding to expand across North America, Europe, Asia-Pacific and the Middle East, and to develop more security tools for hosting, cloud and managed service providers.
