Blackwall quadruples valuation to $2.2B as websites wrangle an increasingly crowded internet

Estonian startup Blackwall has quadrupled its valuation to $2.2 billion, as the internet becomes increasingly crowded. The company, which builds web traffic security tools for hosting providers, raised $100 million at a $2.2 billion valuation. Blackwall's products help websites tackle the surge in bot traffic, especially AI agents. Led by AVP, the Series C round was supported by Dawn Capital, MMC Ventures, and Tera Ventures.

Blackwall's co-founder and CEO, Nikita Rozenberg, explained that the funding boost increased the company's valuation by four times since its previous fundraise in 2025. As web infrastructure companies like Cloudflare, Akamai, Imperva, and Blackwall face growing challenges with DDoS attacks, scraping, botnet farms, and malicious requests, the need for solutions to manage unwanted traffic is significant.

Blackwall doesn't compete with big players in the space and instead partners with web hosting, managed service, and cloud providers. Co-founders Nikita Rozenberg and Roi Carthy stated that hosting companies can customize Blackwall's tools and offer them to their clients under their branding while sharing a revenue cut with the company. The firm provides free traffic and threat analysis, but charges for protection and tools to counter threats.

Blackwall's analysis techniques include digital fingerprinting to distinguish actual visitors and legitimate AI agents from malicious bots, as well as AI models at customers' endpoints to analyze request intent and behavior. As AI agents start interacting and transacting with websites, Blackwall sees an opportunity to manage agent access, terms, and authorization. The company plans to expand its operations globally and develop more security tools for hosting providers, cloud, and managed service providers.