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Tallinn-based Blackwall raised a $100M Series C led by AVP at a $2.2B valuation, quadrupling its value since its 2025 round as bot and AI traffic grows.
Key Takeaways
- Blackwall raised $100M in a Series C led by AVP at a $2.2B valuation, announced October 20, 2026.
- Dawn Capital, MMC Ventures and Tera Ventures, all existing backers, joined the round.
- The company says it is Europe's most valuable cybersecurity scale-up.
Lead
Blackwall, the Estonian web-security company formerly known as BotGuard, raised $100M in a Series C round on October 20, 2026. AVP led the financing at a $2.2B valuation, which the company says is four times the level of its previous round in 2025. The announcement came weeks after Blackwall was valued at about €1B in Estonia's annual TopTech ranking, where it placed fifth.
What Does Blackwall Actually Sell?
Blackwall sells web traffic security and management software to hosting providers, cloud companies and managed service providers, not to website owners directly. Its tools cover bot mitigation, DDoS protection, a web application firewall, load balancing, server-side encryption and management of AI agent traffic. The flagship product, GateKeeper, inspects incoming requests and filters out malicious bots, DDoS attacks and brute-force attempts.
The channel model is the distinguishing feature. Hosts can rebrand and configure the suite as their own offering, which puts Blackwall inside the infrastructure of the providers that serve millions of websites. The company says it filters billions of requests daily. Competitors such as Cloudflare, DataDome and Netacea mostly sell protection to the site operator directly.
Who Backed the Round and Why Does the Valuation Stand Out?
AVP led the round, with general partner Warda Shaheen describing Blackwall as "a security company that grows with the internet itself." Existing investors Dawn Capital, MMC Ventures and Tera Ventures returned. Blackwall did not disclose revenue, customer counts or headcount alongside the announcement.
That omission matters. A $2.2B price tag on undisclosed revenue is a bet on a thesis, namely that automated traffic, including AI agents that crawl and transact on the open web, will force hosts to buy filtering they once treated as optional. The prior round, a €45M Series B in March 2025, coincided with the rebrand from BotGuard to Blackwall. Quadrupling the valuation in roughly 19 months implies investors are pricing growth that the public numbers do not yet show.
How Did Blackwall Get Here?
Blackwall was built around a simple observation by co-founders Nikita Rozenberg, the chief executive, and Denis Prochko: hosting providers carry the abuse traffic but rarely have enterprise-grade defenses. The name borrows from the digital barrier in the video game Cyberpunk 2077. Since the 2025 rebrand, the company has widened from bot filtering into a fuller traffic-management platform.
Estonia has produced several unicorns, mostly in fintech and mobility, and cybersecurity has been a thinner category. Blackwall's valuation puts it at the top of European security scale-ups by the company's own measure, a claim that rests on private-market marks rather than audited comparisons.
What Will the Money Fund?
Blackwall plans to expand across North America, Europe, Asia-Pacific and the Middle East, covering 12 strategic regions. Rozenberg said the funding allows the company to "expand globally" and to build what he called a traffic management ecosystem. He described the web as increasingly automated while its infrastructure remains highly fragmented.
Expansion into North America puts Blackwall into closer contact with US incumbents that have larger sales forces and brand recognition. The channel strategy may blunt that, since a single hosting partner can bring thousands of small customers at once. It also concentrates risk: losing a large host partner would remove many end users in a single step.
What Comes Next for Blackwall?
The next test is disclosure and durability. A $2.2B valuation sets expectations for revenue growth that a private company can defer reporting, but a later round or listing would not. If AI agent traffic keeps rising, hosts have a commercial reason to buy filtering from a supplier that can both block abusive bots and let legitimate agents through.
The risk is that large network providers fold similar features into existing bundles, narrowing the gap that a specialist fills. How quickly Blackwall signs hosts outside Europe will show which outcome is more likely.
Outlook
Blackwall closed a $100M Series C at $2.2B under AVP, with all three earlier investors returning. The company enters a global expansion phase with a distinctive channel model and an undisclosed revenue base. Execution in North America and Asia-Pacific, and the pace of AI agent traffic growth, will determine whether the valuation holds.
