Estonian Cybersecurity Startup Blackwall Raises $100M at $2.2B Valuation
Estonian cybersecurity startup Blackwall has completed a $100 million Series C funding round, bringing its valuation to $2.2 billion. This represents a fourfold increase compared to its previous valuation in 2025. The substantial valuation jump highlights investors' growing confidence in security tools tailored for managing the rising wave of automated web traffic and AI agents. It also shows how specialized cybersecurity providers are scaling through channel partner ecosystems. Rather than selling directly to websites, Blackwall uses a channel partner model to supply custom security tools to web hosting and cloud service providers. Its platform provides threat intelligence, certificate management, DDoS protection, and traffic analysis to differentiate human users from AI agents and bots.
## BACKGROUND
Distributed Denial-of-Service (DDoS) mitigation refers to a set of network management techniques and tools designed to protect targeted servers or websites from malicious attacks that disrupt normal service by overwhelming them with traffic. Effective mitigation involves analyzing traffic patterns and separating legitimate human users and legal bots from malicious intruders.