Hosting providers can sell Blackwall’s web traffic security tools under their own branding, rather than send customers to another security provider. The Estonia-based company, whose products help websites deal with surging bot traffic, particularly from AI agents, said on Tuesday that it had raised $100 million at a $2.2 billion valuation.
AVP led the Series C, joined by returning investors Dawn Capital, MMC Ventures and Tera Ventures. Blackwall’s executive chairman, Roi Carthy, told TechCrunch that the valuation was four times that of its previous funding round in 2025.
For web infrastructure companies such as Cloudflare, Akamai, Imperva and Blackwall, managing unwanted traffic has become both a more valuable business and a tougher job. Their work involves tackling DDoS attacks, indiscriminate scraping, botnet farms, malicious requests and now swarms of AI agents going rogue. Helping websites and hosting providers handle that traffic is a revenue opportunity for them.
Blackwall isn’t trying to go head-to-head with the sector’s biggest players. Instead of selling its platform to websites, it uses a channel model: web hosting, managed service and cloud providers explain what they need, and Blackwall supplies tools they can customize. The providers then offer those tools to their clients, keeping both their own branding and control of the customer relationship.
Co-founder and CEO Nikita Rozenberg told TechCrunch that hosting companies choose which security components to combine according to what they want to offer end customers. They also decide the prices, with Blackwall receiving a share of the revenue. To start, customers get a free tier that displays network traffic and threats; protection and tools for dealing with those threats are paid services.
Blackwall’s services include threat intelligence, certificate management, DDoS protection and traffic routing. It also analyzes customers’ web traffic, separating actual visitors and legitimate AI agents from malicious bots, intruders and disruptive traffic.
According to Rozenberg, techniques including digital fingerprinting help identify which software sent a request, such as Microsoft Office or Codex, so Blackwall can filter out bots. Its own AI models also run at customers’ endpoints, examining incoming requests for intent and behavior. That analysis is intended to tell a person-directed agent making a real request apart from a malicious bot.
Rozenberg sees a big opportunity in the coming years as AI agents start interacting and transacting with websites on behalf of their users. Such activity should eventually call for systems that govern agent access, establish its terms and manage authorization for payments.
Blackwall isn’t the only one going after this. With Cloudflare’s AI Crawl Control, website owners can permit or block individual AI crawlers and optionally charge them for access. Rozenberg’s argument for Blackwall is that hosting providers can deliver traffic management themselves, without passing the customer relationship to a separate security provider.
Blackwall plans to spend the funding on expanding its operations in North America, Europe, Asia-Pacific and the Middle East, as well as building more security tools for hosting, cloud and managed service providers.
