Series C Cybersecurity companies in New York

Companies defending or attacking software, networks, and cloud infrastructure. Filtered to Series C-stage companies headquartered in New York.

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Ranked by current headcount across Series C Cybersecurity companies in New York. Refreshed monthly.

1
Filigran· New York, New York, United States
Filigran, a cybersecurity company, delivers a unique open-source, threat-informed approach to Continuous Threat Exposure Management (CTEM). Underpinned by an agentic foundation, Filigran’s eXtended Threat Management (XTM) platform delivers proactive security by combining threat intelligence, exposure validation, and cyber risk quantification. The platform includes OpenCTI, OpenAEV, and OpenGRC (forthcoming).
- Series C
- 272 employees
- Founded 2022
2
Zenity· New York, New York, United States
Zenity is the first security and governance platform purpose-built for AI agents - spanning SaaS, home grown platforms (Cloud), and end-user devices (Endpoint). Trusted by Fortune 500 enterprises, Zenity helps security teams confidently adopt AI by delivering defense in depth with full-lifecycle coverage: from agent discovery and posture management to real-time detection, prevention, and response. As enterprises adopt Microsoft Copilot, Salesforce Agentforce, AWS Bedrock, and developer tools like GitHub Copilot, Zenity eliminates blind spots and enforces consistent policy across environments so organizations can innovate with AI, without compromising security. Learn more at www.zenity.io.
- Series C
- 268 employees
- Founded 2021
3
CHEQ· New York, New York, United States
CHEQ is the leading identity, security and intelligence platform for the open web, trusted by the world's leading brands across industries including cybersecurity, financial services, retail and ecommerce, and technology. Human, bot, or AI agent—CHEQ instantly reveals the entity behind it, its authenticity, and its intent with industry-leading accuracy. More than 15,000 companies, from the Fortune 50 to industry innovators, rely on CHEQ to secure their websites, protect their marketing investments, and govern who interacts with their digital experiences. CHEQ's platform combines the industry's only triple-layer traffic, trust, and identity intelligence engine with the world's largest independent identity graph for fraud and trust.
- Series C
- 252 employees
- Founded 2016
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4
DataDome· New York, New York, United States
DataDome delivers real-time bot and agent trust management, giving businesses complete visibility and control over all traffic—human, bot, or AI. Named a Leader in The Forrester WaveTM: Bot And Agent Trust Management Software, Q2 2026, DataDome is trusted by enterprises like Etsy, PayPal, and Soundcloud. Acting as a traffic control plane, DataDome's multi-layered AI engine leverages thousands of models and 5 trillion signals daily to analyze intent and stop fraud in under 2 milliseconds—letting legitimate users through seamlessly across websites, apps, APIs, and MCPs. Backed by a 24/7 SOC and expert threat researchers, DataDome stops 20k+ attacks every second. With 30+ global PoPs, and 80+ ready-made integrations, DataDome is a recognized Leader on G2 across several categories—delivering protection that outperforms.
- Series C
- 223 employees
- Founded 2015
5
OLIGO Security· New York, New York, United States
Oligo is the industry's leading runtime security platform that solves today's toughest challenge: stopping attacks in real time in the AI era. Oligo transforms security from passive visibility to active protection across applications, cloud services, workloads, AI applications, and AI agents. By uncovering the deepest layers of what actually runs in production, Oligo empowers customers to prioritize exploitable vulnerabilities, detect malicious behavior as it happens, and stop modern attacks in their tracks.
- Series C
- 131 employees
- Founded 2022

6
Perimeter 81, a Check Point Company· New York, New York, United States
Perimeter 81 is a robust, yet easy-to-use, converged networking and network security platform which connects all users, in the office or remote, to all resources, located on-prem, or cloud. It is a cloud-native service that includes advanced capabilities such as Zero Trust remote access, Internet access control, malware protection and firewall as a service. It enables any business to build a secure corporate network over a private global backbone, without hardware and within minutes. The entire service is managed from a unified console and is backed by an award-winning global support team that has you covered 24/7.
- Series C
- 98 employees
- Founded 2018
7
Morphisec· New York, New York, United States
We empower organizations with resilient, self-healing capabilities that prevent  and neutralize even the most advanced cyber threats.
- Series C
- 98 employees
- Founded 2014
8
Intezer· New York, New York, United States
Intezer AI SOC delivers measurable security results, not just productivity gains. By combining AI agents with proven forensics that includes endpoint analysis, memory scanning, file reverse engineering, and threat intelligence, Intezer provides fast, consistent, and accurate alert triage. This hybrid approach reduces heavy AI processing and achieves median triage times under one minute with predictable cost.
- Series C
- 89 employees
- Founded 2016
9
Beyond Identity· New York, New York, United States
Beyond Identity secures every identity—human, machine, and AI.The only Identity Defense Platform built secure-by-design to prevent unauthorized access. We pioneered Device Identity: hardware-bound cryptographic credentials that eliminate passwords, prevent credential attacks, and deliver continuous device trust.From passwordless workforce access to customer authentication that accelerates conversions and stops fraud, to frictionless code signing for developers and AI agent identity, Beyond Identity ensures only verified identities on secure devices can access your resources.Trusted by global enterprises like Snowflake, SAP Taulia, and World Wide Technology.
- Series C
- 69 employees
- Founded 2020
10
Safend· New York, New York, United States
A single-agent solution, Safend DPS protects sensitive company data via comprehensive data encryption of ports and devices restriction, as well as control and content inspection. Safend’s product suite includes: 1.Protector: controlling port and device endpoints and media encryption2.Encryptor: transparent encryption on laptops and PCs3.Inspector: inspects, classifies and blocks sensitive data leakage 4.Reporter: regulatory compliance reports and security log summaries 5.Auditor: immediate risk detection on WiFi ports/devices connected to endpoints6.Discoverer: locates and maps sensitive data at rest Safend DPS is silent policies and rules-based solution, answering the following compliances: Sarbanes Oxley, (SOX), HIPAA, PCI, FISMA, BASEL II, UK Data Protection Act (DPA). Furthermore, Safend’s customers include multi-national enterprises, government agencies, healthcare organizations and mid-sized companies worldwide.
- Series C
- 31 employees
- Founded 2003

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Find engineers at Series C Cybersecurity companies in New York

Searching for “engineers at top Series C Cybersecurity companies in New York” surfaces this slice of the market. The list above ranks Cybersecurity companies headquartered in New York whose latest disclosed round is Series C, by current headcount, drawn from public LinkedIn and Crunchbase records. With 11 matching companies in Refolk’s index, this is a tight read on where the Cybersecurity talent in New York is heating up.

Three filters at once narrows the field hard. The companies that survive all three - Series C, Cybersecurity, in New York - are usually the most targeted recruiting pool a hiring manager can ask for. Senior engineers, founding designers, and product leads here are about to become Cybersecurity’s next operators and angel investors.

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Refolk pulled Cybersecurity companies headquartered in New York whose latest disclosed funding round is Series C from public LinkedIn and Crunchbase records, ranked them by current employee count, and kept those with at least 3 employees. The list refreshes monthly.

Last refreshed: Fri, 18 Sep 2026 07:53:17 GMT

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