Blackwall, a web-security startup headquartered in Estonia, has secured a $100 million Series C round that values the company at $2.2 billion—four times its previous valuation from 2025. The company’s tools are aimed at helping hosting providers and websites cope with rising volumes of bot traffic, including hostile AI agents.
Channel Sales Model Over Direct-to-Customer
Unlike many security vendors that sell directly to website owners, Blackwall works through channel partners like web hosts, managed service providers, and cloud infrastructure firms. These partners integrate Blackwall’s suite of tools under their own brands and then offer them to their clients. Hosting companies choose which security modules to bundle, set pricing, and share revenue with Blackwall.
The offering starts with a free tier that reveals traffic and threat data. But protection and mitigation tools—such as for DDoS attacks—are paid features. Additional capabilities include threat intelligence, SSL/TLS certificate management, traffic routing, and advanced bot detection. This includes distinguishing legitimate human users and benign AI agents from malicious bots using techniques like digital fingerprinting and endpoint AI models.
Why the Surge in Demand?
Web infrastructure firms are increasingly stressed by a spectrum of threats: brute-force or distributed denial-of-service attacks, indiscriminate scraping, massive bot farms, and lately flocks of AI agents acting with malicious intent. As websites become more dynamic and automated agents proliferate, the need for nuanced traffic control has intensified. Blackwall aims to fill that gap.
Current competitors have similar offerings—Cloudflare, for example, has its AI Crawl Control feature which lets site owners allow or block specific AI crawlers and even monetize access. But Blackwall believes its distribution model—selling through hosting providers rather than directly to end users—gives it an advantage because it enables partners to maintain client relationships and tailor service catalogs.
With the new funding, Blackwall plans to expand its footprint in North America, Europe, Asia-Pacific, and the Middle East, while also developing new security tooling targeted at hosting, cloud, and managed service providers.
Blackwall’s rise reflects broader shifts in internet infrastructure. As AI agents start interacting more autonomously with websites—making purchases, filling out forms, or engaging in transactions—websites will need more advanced systems to authenticate, authorize, and filter those interactions. What Blackwall is doing isn’t just about stopping attacks; it’s about shaping how traffic is managed in a more automated, agent-rich web.
For hosting providers and site operators, the implications are huge. Blackwall’s approach could shift security decisions upstream, embedding traffic filtering as a core courtesy of hosting rather than an optional bolt-on. It also signals where the next wave of internet defense is focused: making sense of requests, not just blocking bad ones, and enabling trusted AI agents while screening out the rest. For competitors, the challenge will be matching this model—and for regulators and web standards bodies, the questions about who controls access in an increasingly agent-mediated web are only just starting.
