Estonia-headquartered Blackwall, a developer of web traffic security solutions for hosting providers, announced Tuesday it has secured $100 million at a $2.2 billion valuation. The company creates products that enable websites to manage the rapid growth in automated bot traffic, with particular focus on AI agents.

The Series C round was led by AVP and included participation from prior backers Dawn Capital, MMC Ventures and Tera Ventures. Executive chairman Roi Carthy informed TechCrunch that this round lifted the firm valuation fourfold compared with its last raise in 2025.

In recent years, web infrastructure firms including Cloudflare, Akamai, Imperva and Blackwall have operated in a high-value yet challenging arena. They confront DDoS attacks, broad scraping, botnet operations, harmful requests and expanding groups of uncontrolled AI agents. At the same time, this environment offers strong revenue potential by supporting hosting providers and sites in controlling unwanted traffic.

Blackwall avoids direct competition with larger players. Rather than selling its platform straight to websites, it follows a channel model that partners with web hosting, managed service and cloud providers. The firm learns their requirements and supplies a customizable set of tools. Providers can then deliver Blackwall security features to their clients under their own brand while keeping the customer relationship.

Both parties benefit financially. Co-founder and CEO Nikita Rozenberg explained to TechCrunch that hosting firms can combine security elements to create tailored offerings, set pricing and share revenue with Blackwall. Customers receive an initial free tier that displays network traffic and threats, after which protection tools incur charges.

Beyond threat intelligence, certificate management, DDoS protection and traffic routing, Blackwall reviews customer web traffic to separate genuine visitors and authorized AI agents from harmful bots and disruptive sources. Rozenberg noted the use of digital fingerprinting to identify request origins, such as Microsoft Office or Codex, and the deployment of proprietary AI models at endpoints to assess request intent and behavior.

Rozenberg anticipates major growth as AI agents increasingly interact and transact with websites on behalf of users. Future systems will need to govern agent access, define terms and authorize payments.

Blackwall is not the only firm pursuing this space. Cloudflare offers AI Crawl Control that lets site owners permit or restrict specific AI crawlers and includes a paid-access option. Rozenberg maintains Blackwall holds an edge by enabling hosting providers to deliver traffic management services directly instead of transferring customer ties to an external security vendor.

The new capital will support expansion across North America, Europe, Asia-Pacific and the Middle East while advancing additional security tools for hosting, cloud and managed service providers.