Estonia-based web traffic security company Blackwall raised a $100M Series C led by AVP at a $2.2B valuation, after raising a $49.2M Series B in March 2025

Hosting providers can now offer advanced AI agent traffic management as a branded service, blurring the lines between infrastructure and security.

Estonia-based Blackwall, a company specializing in web traffic security tools for hosting providers, has successfully closed a $100 million Series C funding round, achieving a valuation of $2.2 billion. This represents a quadrupling of its valuation since its Series B raise in March 2025. The round was led by AVP, with participation from existing investors Dawn Capital, MMC Ventures, and Tera Ventures. Blackwall develops products to help websites manage the increasing volume of bot traffic, including AI agents. The company employs a channel approach, partnering with web hosting, managed service, and cloud providers who then offer Blackwall's customizable security tools to their own clients under their branding. This allows hosting companies to offer tailored security solutions, set their own prices, and share revenue with Blackwall. The funding will be used to expand Blackwall's global operations and develop new security tooling for its partners.

Blackwall's strategy of empowering hosting providers to rebrand and offer sophisticated bot and AI agent traffic security directly to their end customers differentiates it from competitors like Cloudflare. This channel-first approach allows hosting providers to maintain direct relationships and control over their client base, while Blackwall gains scalable distribution without direct sales to individual websites. The company's focus on providing adaptable toolkits for providers to customize and price suggests a growing trend toward more modular and partner-driven security solutions in the crowded web infrastructure market.

The significant valuation increase signals strong investor confidence in Blackwall's model for addressing the escalating challenges of bot and AI agent traffic. As AI agents become more prevalent in interacting with web services, the demand for granular control and security over this traffic is projected to grow substantially. Blackwall is positioning itself to capitalize on this by enabling infrastructure providers to be the first line of defense and management for this evolving threat landscape.