SquareX Raises $20 Million for Revolutionary Browser Detection and Response Solution

SquareX discovers how polymorphic extensions impersonate legitimate extensions to harvest credentials.

Be Fearless Online with the Leading Browser Security Solution

SquareX is pioneering the industry’s first Browser Detection and Response (BDR) solution on the market that empowers organizations to proactively detect, mitigate, and threat-hunt sophisticated client-side attacks, enabling secure browsing without compromising productivity or user experience.

See SquareX in Action

Our Vision

Empower Enterprise Users to Be Fearless Online

Our driving vision is simple yet powerful: Allow enterprise users to be fearless online. We believe security should enable, not hinder, teams to work, connect, and innovate confidently in the digital world.

Our Mission

Build A Pioneering Browser Detection and Response Solution

SquareX's mission is to protect enterprises with its Browser Detection and Response (BDR) solution by empowering organizations to proactively detect, mitigate, and threat-hunt client-side web attacks. We focus on securing the browser – the most critical platform for employee activity today – against modern threats.

Learn how our Browser Detection and Response (BDR) solution protects your enterprise

Learn More

Revolutionizing Security Where Attacks Happen Most: The Browser

Legacy security approaches often leave a critical gap: the browser, where nearly all work and consequently a vast majority of cyberattacks occur today. SquareX addresses this head-on, revolutionizing browser security by pioneering the industry’s first Browser Detection and Response (BDR) solution. Our BDR platform delivers critical protection against a wide spectrum of sophisticated browser-native threats, including:

Malicious browser extensions
Advanced spearphishing attacks
Browser-native ransomware
Identity attacks in the browser
Generative AI data loss/leakage
Other client-side web attacks

See it in action

Seamless Security, Uncompromised Productivity

Unlike cumbersome enterprise browsers that come with significant change management, SquareX integrates seamlessly with any major browser that your teams already use and love, including Chrome, Edge, FireFox and Safari. This unique approach offers Enhanced Security and Reduced Enterprise Risk, Unparalleled Visibility & Control and Uninterrupted Productivity.

SquareX fills a critical security gap, enabling IT and cyber leaders to break free from outdated paradigms and secure their enterprise effectively.

Schedule a demo

Enhanced Security and Reduced Enterprise Risk

Proactively detect and mitigate threats directly within the browser to radically shrink your attack surface while strengthening your overall cybersecurity posture.

Unparalleled Visibility & Control

Enable granular control with deep, actionable insights on any attack targeting employees online.

Uninterrupted Productivity

Robust protection without sacrificing user experience or slowing down workflows.

Our Core Values

Foundation of SquareX

These principles guide our decisions, drive our product development, and define who we are as a company dedicated to securing the enterprise:

Attacker Mindset

With decades of experience in offensive security, SquareX has a deep understanding of the attacker mindset and takes a proactive approach in researching and predicting the evolution of attacks before they happen. SquareX has discovered and disclosed multiple zero days, which have been highlighted in major publications and conferences such as DEFCON and RSA.

Maniacal Obsession on User Experience

SquareX believes that security should not come at the cost of user experience and productivity. This obsession is reflected in every design choice in the product to achieve the goal of being as invisible and seamless as possible to the end user.

Relentless Pursuit of Innovation

At SquareX, we are constrained by traditional ways of building technologies. We are relentless about learning the newest technologies and not only how they can be exploited by adversaries, but also how they can be leveraged creatively to elevate an enterprise's defense strategy to the next level.

Guided by Visionary Leadership & Deep Expertise

SquareX is powered by a team of cybersecurity experts, unconventional technologists, deeply curious geeks and passionate problem-solvers, with decades of collective experience in building and scaling global IT and security solutions.

Vivek Ramachandran

Founder & CEO

Vivek is the driving force behind SquareX.

A globally recognized cybersecurity expert—with more than 20 years of experience building security products and sharing his knowledge with the community—Vivek brings unparalleled expertise in offensive security and threat analysis. He discovered the infamous Caffe Latte Attack, has authored multiple books and research papers on offensive cybersecurity techniques, and has spoken at major security conferences including DEFCON, Black Hat, and RSA Conference. His deep understanding of attacker methodologies shapes SquareX's unique BDR strategies, focusing on proactive defense where enterprises need it most – the browser.

He also serves as a Regional Director of Cybersecurity for Microsoft and sits on the Black Hat Arsenal Review Board.

Prior to starting SquareX, he founded Pentester Academy, a revolutionary cloud-based cybersecurity training company that trained more than 100,000 students globally before it was successfully acquired in 2021. Prior to Pentester Academy, Vivek built wireless monitoring solutions, pentesting gadgets, and other security tools that were acquired by government organizations.

David Smith

Chief Revenue Officer

Dave leads SquareX's global revenue generation and enterprise go-to-market strategy. As a veteran with over 30 years of experience scaling IT and security companies, Dave is focused on building strong partnerships with enterprise clients and channel partners to ensure maximum security and business value is delivered. Key highlights in Dave’s career include leading the commercial teams at WhiteHat Security and Mocana until their respective successful exits to NTT Global and DigiCert. Across his leadership roles, Dave has consistently demonstrated his unique ability to drive hypergrowth in organizations with bleeding edge products.

Mary Yang

Chief Marketing Officer

Mary spearheads SquareX's marketing and communications initiatives, driving brand awareness and demand for SquareX’s pioneering BDR solutions. Mary has more than 20 years of experience building impactful marketing and communications strategies for IT companies and cybersecurity startups, with multiple successful exits. She was named by SC Media as a 2024 Women in IT Security Honoree, has supported the publication of multiple papers with the National Institute of Standards and Technology (NIST) and Center for Internet Security (CIS), and has spoken at major cybersecurity events such as RSA Conference.

John Carse

Field CISO

John is the strategic security advisor to SquareX's enterprise customers, helping them strengthen their browser security posture and translate complex technical concepts into business value for executive stakeholders. In this role, he bridges the gap between SquareX's browser detection and response solutions and the evolving needs of its global client base.

Throughout his career, John has established robust security frameworks across diverse geographies and industries—ranging from the U.S. military to finance and technology companies. His global security leadership spans globally recognized household brands, including Expedia and JP Morgan Chase. Prior to joining SquareX, he served as CISO at Dyson, where he was honored as the Cybersecurity Defender of 2023 for the Asia Pacific region. Before Dyson, he was the CISO for Rakuten Mobile and Rakuten Symphony, where he led IT engineering and operations for the world's first fully virtualized Open RAN mobile network.

Jeswin Mathai

Chief Architect

Jeswin leads the design and implementation of SquareX’s infrastructure. Previously, he was part of Pentester Academy (acquired by INE) where he was responsible for managing the company’s lab platform, which was used by thousands of customers. A seasoned speaker and researcher, Jeswin has showcased his work at prestigious international stages such as DEFCON US, DEFCON China, RootCon, Blackhat Arsenal, and Demo Labs at DEFCON. He has also imparted his knowledge globally, training in-classroom sessions at Black Hat US, Asia, HITB, RootCon, and OWASP NZ Day. Jeswin is also the creator of popular open-source projects such as AWSGoat, AzureGoat, and PAToolkit.

Shourya Pratap Singh

Principal Software Engineer

Shourya is responsible for building SquareX's security-focused extension and works on researching methods to counteract web security risks. As an upcoming figure in cybersecurity, Shourya has shared his research on global stages like DEFCON and Blackhat Arsenal EU and delivered several workshops at prestigious events such as the Texas Cyber Summit. He earned his bachelor's degree from IIIT Bhubaneswar and is a patent holder. Shourya’s professional passions are centered around enhancing the security of browser extensions and web applications.

Mridula Kapur

Chief of Staff

Mridula Kapur serves as Chief of Staff at SquareX, where she partners closely with the founder to accelerate the company’s growth and establish the emerging BDR category. With over a decade of experience scaling startups, Mridula has been part of multiple high-growth journeys from seed funding to IPO, bringing a unique operator’s perspective to every stage of company building. She has led go-to-market strategy, built global B2B operations, and driven cross-functional alignment across sales, marketing, and product teams. Prior to SquareX, she served as Vice President at Binary Security Group (Pentester Academy, acquired by INE), where she built the sales engine from the ground up and successfully steered the company through acquisition. Known for her ability to navigate critical inflection points, Mridula has consistently built high-performing teams and driven enterprise adoption across new and competitive markets

Audrey Adeline

Founder’s Office

Audrey is part of the Founder’s Office at SquareX, where she works with the management team to drive key strategic initiatives and cross-functional operational projects. She leads SquareX’s market research and analyst relations. She has a deep understanding of cybersecurity and technology businesses from her time at Sequoia Capital, where she advised on the investment and company building of multiple cybersecurity and software startups. Due to her interest in the industry, she occasionally dabbles in research and has presented in various conferences such as RSA and BSides SF. She also co-authored The Browser Security Field Manual and is an active member of the Women in Security and Privacy (WISP)’s HQ Committee.

Junice Liew

Head of PR

Junice Liew is the Head of Public Relations at SquareX, leading global visibility efforts through strategic media outreach and press engagement. She brings international experience in PR, marketing communications, influencer strategy, and brand storytelling. At SquareX, she has secured coverage in top publications such as Bleeping Computer, Forbes, and TechRadar, strengthening the company’s credibility and thought leadership. Her integrated background ensures that SquareX’s public voice resonates with both enterprises and the cybersecurity press and community.