Top Series B Cybersecurity companies

XM Cyber is transforming the way organizations prevent attacks that put their business at risk with the most reliable Continuous Exposure Management platform. The platform discovers, prioritizes, and drives remediation of validated exposures across on-prem and cloud environments, from the external attack surface all the way to critical assets. With XM Cyber, you can see all the ways attackers might go, and all the best ways to stop them, pinpointing where to remediate exposures with a fraction of the effort.

• Series B
• 445 employees
• Founded 2016

Bishop Fox is recognized as the leading authority in offensive security, providing solutions ranging from continuous penetration testing, red teaming, and attack surface management to product, cloud, and application security assessments.Enterprises have been told that breaches are inevitable. But we don’t accept that. We focus on offensive security because we believe securing modern organizations requires a "forward defense" approach that proactively uncovers and eliminates exposures before they are exploited.Over the past 20 years, we’ve worked with more than 25% of the Fortune 100, 8 of the top 10 global tech companies, and hundreds of other organizations to improve their security.Security isn’t just a job to us. We do this because we love it — and because we're committed to the common good. In fact, we have authored 20+ open-source tools, shared groundbreaking research, and published more than 50 security advisories in the last 5 years. Learn more about us at bishopfox.com or follow us on X @bishopfox for the latest updates.

• Series B
• 385 employees
• Founded 2005

iboss is a leading Zero Trust Secure Access Service Edge (SASE) cloud security platform that consolidates network and security technologies into a single cloud-based service. By integrating VPN, Secure Web Gateway (SWG), SD-WAN, branch firewalls, Browser Isolation, and Cloud Access Security Broker (CASB) capabilities, iboss replaces legacy solutions to enhance security, reduce complexity, and lower costs. Utilizing Zero Trust Network Access (ZTNA), iboss grants users access only to the applications they need based on their identity, minimizing risks of breaches and data loss. As a unified network and security service with a single-pane-of-glass management console, iboss empowers organizations to enhance security, improve user experience, and support a distributed workforce in today's evolving digital landscape. Leveraging a purpose-built cloud architecture backed by 230+ issued and pending patents and more than 100 points of presence globally, iboss processes over 150 billion transactions daily, blocking 4 billion threats per day. More than 4,000 global enterprises trust the iboss platform to support their modern workforces, including a large number of Fortune 50 companies. iboss was named a Leader in the IDC MarketScape for Worldwide ZTNA, one of the Top 25 Cybersecurity Companies by The Software Report, one of the 25 highest-rated Private Cloud Computing Companies to work for by Battery Ventures, CRN’s top 20 Coolest Cloud Security Companies, and is one of Inc.’s 2024 Best Workplaces.

• Series B
• 357 employees
• Founded 2003

ReversingLabs is the trusted name in file and software security. We provide the modern cybersecurity platform to verify and deliver safe binaries. Trusted by the Fortune 500 and leading cybersecurity vendors, the ReversingLabs Spectra Core powers the software supply chain and file security insights, tracking over 40 billion searchable files daily with the ability to deconstruct full software binaries in seconds to minutes. Only ReversingLabs provides that final exam to determine whether a single file or full software binary presents a risk to your organization and your customers.RL - Trust Delivered.

• Series B
• 327 employees
• Founded 2009

Hoxhunt is a human risk management platform that goes beyond security awareness to drive behavior change and measurably lower risk. We combine AI and behavioral science to create individualized micro-training experiences people love. Employees learn to detect and report advanced phishing attacks. Operations teams respond fast with limited resources. And security leaders gain outcome-driven metrics to document reduced cybersecurity risk. Hoxhunt works with leading global companies such as Airbus, IGT, DocuSign, Nokia, AES, Avanade, and Kärcher and partners with leading global cybersecurity companies such as Microsoft and Deloitte.

• Series B
• 306 employees
• Founded 2016