Blackwall raises $100M Series C at $2.2B valuation to scale web traffic platform
Estonian web infrastructure firm Blackwall secured $100 million in Series C funding to expand its bot mitigation and traffic management ecosystem for cloud providers.
Key points
- Blackwall raised $100 million in Series C funding, reaching a $2.2 billion valuation according to SiliconANGLE.
- The Estonia-based company builds tools to filter malicious bots, DDoS attacks, and brute-force attempts for web hosts.
- AVP led the round, with participation from Dawn Capital, MMC Ventures, and Tera Ventures.
Blackwall, a web infrastructure and cybersecurity firm headquartered in Estonia, announced it has closed $100 million in Series C funding. The investment values the company at $2.2 billion and aims to scale its platform for managing and optimizing global web traffic, according to SiliconANGLE.
The capital injection will support the company’s expansion into new global markets and deepen its existing technology stack. Blackwall provides solutions for web-hosting companies, cloud providers, and managed service providers seeking to protect their clients’ websites from automated threats. The firm operates at the edge of the internet, inspecting traffic before it reaches end-user applications.
Platform Capabilities and History
Blackwall’s flagship product, GateKeeper, filters incoming web traffic to block malicious bots, application-layer distributed denial-of-service attacks, and brute-force login attempts. The broader service suite includes firewalls, load balancing, and optimization tools designed to distinguish legitimate human or AI traffic from potential attackers. This allows infrastructure providers to reduce operating costs while speeding up legitimate traffic delivery.
The company rebranded from BotGuard in March 2025, coinciding with its Series B funding round. The name Blackwall references a digital barrier in the video game Cyberpunk 2077, which protects the Net from rogue artificial intelligences. Co-founder and Chief Executive Nikita Rozenberg stated the new funding will help build a unified traffic management ecosystem for a fragmented web infrastructure.
Investor Perspective and Market Position
AVP led the Series C funding round, with existing investors Dawn Capital, MMC Ventures, and Tera Ventures participating. Warda Shaheen, General Partner at AVP, noted that Blackwall has built a security layer in front of millions of websites. Shaheen indicated that as more web traffic originates from agents, the company’s position becomes increasingly indispensable to the internet’s infrastructure.
Rozenberg emphasized that the web is becoming more automated and distributed, yet the underlying infrastructure remains fragmented. The company’s ambition is to bridge these gaps by providing hosting and infrastructure providers with the technology needed for the next generation of web interactions. Blackwall partners directly with these providers to catch unwanted traffic and improve performance.
What should you do?
Security professionals should review their current web traffic management strategies to ensure they can distinguish between legitimate AI agents and malicious bots. Organizations using Blackwall’s services should verify that their configurations align with the latest updates to the GateKeeper platform. Infrastructure providers should assess whether their current partners offer sufficient protection against application-layer DDoS attacks and brute-force attempts.
What to do and how to stay safe: Blackwall
- Audit current web application firewall rules to ensure they effectively filter malicious bots and automated traffic.
- Verify that load balancing configurations are optimized to handle increased volumes of AI-generated web traffic.
- Monitor for signs of application-layer distributed denial-of-service attacks that may bypass traditional perimeter defenses.
- Review partnerships with web hosting and cloud providers to ensure they offer robust traffic inspection capabilities.
Step-by-step guide: Mobile Device Security: How to Protect Data Beyond Passwords
General security guidance from the Threat Times newsroom. It is not confirmed advice from the organisations named in this story.
Frequently asked questions
How much funding did Blackwall raise in its Series C round?
Blackwall raised $100 million in its Series C funding round, according to SiliconANGLE.
What is Blackwall's current valuation?
The company is valued at $2.2 billion following the Series C investment.
Who led the Series C funding round for Blackwall?
AVP led the round, with participation from existing investors Dawn Capital, MMC Ventures, and Tera Ventures.
