Seed Round Led by Valley Capital Partners

February 18, 2025 08:00 AM Eastern Standard Time

SAN FRANCISCO–(BUSINESS WIRE)–MirrorTab, a provider of advanced web application protection, announced today it has raised $8.5 million in seed funding. The round was led by Valley Capital Partners, with participation from GV, Ludlow Ventures, Altman Capital Fund, NextGen Venture Partners, and Alumni Ventures.

“Attackers have discovered that the browser can be actively and extensively exploited – and that there’s currently no way to stop them”Post this

MirrorTab dynamically protects web applications without impacting user experience or requiring additional software or plugins. Using isolation technology, MirrorTab removes the browser as an attack surface, obfuscating data, code, and Application Programming Interfaces (APIs) to establish the most secure web sessions. This ensures that sensitive business, personal and financial information can be shared with confidence. The company plans to use its seed funding to aggressively build out its innovative capabilities, integrations, and commercialize its availability.

“Browsers have become the battleground for hacking, bots, and malware,” said Brian Silverstein, CEO and founder of MirrorTab. “Cyberattacks have evolved, leveraging browsers, AI and automation to evade detection, mimic human-like behavior, and execute attacks that cannot be prevented with typical web security controls. MirrorTab addresses this critical blind spot in traditional detection-based solutions.”

Before founding MirrorTab, Brian co-founded Honey, the shopping rewards browser extension that helps users save money with coupons. With the rise of AI and increasing attack complexity, he saw how similar technology could be weaponized by bad actors to exploit web sessions without the user or platform ever knowing. When data is rendered into the browser, it becomes exposed to threats such as malware and bad extensions, exposing customers and platforms to fraud and privacy leaks that are invisible to perimeter defenses.

“MirrorTab protects any web platform by securing the session itself—a capability that Web Application Firewalls (WAFs) and bot management tools don’t have,” said Allison Miller, MirrorTab Advisor and Former CISO and VP of Trust at Reddit, who also held cybersecurity roles at Bank of America, Google, PayPal, and Visa. “It creates a secure, bot-proof wrapper. Even if the client is untrusted or compromised, MirrorTab ensures sensitive information doesn’t leak, under all circumstances. In high-stakes interactions, such as account takeovers or fraud, MirrorTab provides the gold standard of protection without disrupting the user experience.”

“Attackers have discovered that the browser can be actively and extensively exploited – and that there’s currently no way to stop them,” said Steve O’Hara, Founder and Managing Partner at Valley Capital Partners. “Recent events have shown just how devastating these attacks can be, with critical personal and financial information easily acquired. The scale of fraud, theft, and damage attributable to these client side attacks is shocking and unacceptable. We believe that MirrorTab has created an innovative and effective solution that is unmatched in stopping these hard-to-detect attacks.”

For more information on how MirrorTab can protect your web applications visit: www.mirrortab.com.

About MirrorTab

MirrorTab is a cyber security company providing advanced web security solutions that defend web applications against cyber threats like hacking and malware. By eliminating the client-side browser attack surface with proprietary isolation technology, MirrorTab blocks harmful extensions, middleware, and malware from accessing APIs, infrastructure, data, and code on any web platform. This server-side solution, with deep integration into existing defense layers (WAF, DDoS, etc.), provides robust protection on any browser without impacting user experience or requiring additional software or plugins. For more information, visit www.mirrortab.com and follow us on LinkedIn.

About Valley Capital Partners

Valley Capital Partners is a leading early stage venture capital firm backing highly technical, mission-driven founding teams in enterprise infrastructure and applied AI. We leverage our deep professional networks and decades-long company building and investment experience to help founders build and scale their businesses into world-class companies. Valley Capital is backed by leading funds, prominent family offices and iconic investors who have built the entrepreneurial, technical and financial fabric of Silicon Valley and beyond. www.valleycapital.vc

Contacts

Jeff Drew
Guyer Group for MirrorTab
P: (617) 233-5109
E: mirrortab@guyergroup.com

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