Web browsers have quietly become the new battleground for cybersecurity threats — and most organizations aren’t fully ready for it.

That’s exactly why SquareX just raised $20 million in Series A funding, led by SYN Ventures, with participation from Peak XV Partners (formerly Sequoia Capital SEA).

I want to break down why this matters and what SquareX is actually offering — because it could seriously change how we think about browser security moving forward.

SquareX has introduced what it calls Browser Detection and Response (BDR) — and it’s a refreshingly practical idea.

Instead of forcing companies to rip and replace the browsers employees already use, SquareX layers enterprise-grade security directly into existing browsers via a lightweight extension. That means you get the benefits of a dedicated secure browser without all the painful change management.

Here’s what the extension is designed to defend against:

• Malicious browser extensions
• Phishing attacks
• GenAI-driven data leaks
• Insider threats
• Other web-based risks

According to Vivek Ramachandran, CEO of SquareX, the goal is to eliminate the trade-off between strong security and a smooth user experience — something I know has been a real pain point for IT teams trying to lock down browser environments without upsetting productivity.

“The browser is the new endpoint, yet it remains a major blind spot for most organizations,” Vivek said. “We built SquareX to eliminate this compromise.”