Series A Cybersecurity companies in New York
Companies defending or attacking software, networks, and cloud infrastructure. Filtered to Series A-stage companies headquartered in New York.
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Ranked by current headcount across Series A Cybersecurity companies in New York. Refreshed daily.
- 1TypingDNA· Brooklyn, New York, United States
Recognize people by the way they type. AI based Authentication and Fraud Detection.
- Series A
- 149 employees
- Founded 2016
- 2Seal Security· New York, New York, United States
Seal Security’s AppSec Remediation Agent delivers real, human-vetted, production-ready fixes for open source vulnerabilities - resolving risk directly in your applications without slowing teams down.
- Series A
- 114 employees
- Founded 2022
- 3LayerX Security· New York, New York, United States
LayerX agentless AI & Browser Security Platform protects organizations against AI, SaaS, web & data leakage risks across any browser, application, device, and identity, with no impact on user experience.Delivered as an Enterprise Browser Extension, LayerX secures all last-mile user interactions with AI, SaaS & web applications and offers the most comprehensive visibility and enforcement capabilities for AI and browsing risks, including: shadows AI and SaaS discovery, data leakage prevention across GenAI, web and SaaS channels, protection against malicious browser extensions, protection against zero-hour web attacks, identity governance over work and personal identities, and more.
- Series A
- 99 employees
- Founded 2021
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- 4Gambit Security· New York, New York, United States
Gambit's Balens is the AI native resilience platform that ensures digital continuity never expires. Designed to bridge the fragmented nature of recovery operations, Gambit provides a unified governance and control plane across cloud, backups, security tools, and Infrastructure as Code (IaC) to reconcile intent with live reality. By mapping applications, identifying resilience gaps, and validating recovery paths in real-time, Gambit turns resilience assumptions into business certainty - before an incident ever occurs. Already trusted by global enterprises to minimize disruption and automate compliance, Gambit enables organizations to stay ahead of ransomware attacks, innovate at speed while proving their recoverability on demand.
- Series A
- 80 employees
- Founded 2024
- 5Clutch Security· New York, New York, United States
Clutch is the identity security platform for the AI era. As AI agents multiply across the enterprise, the identity landscape has fundamentally changed. Agents inherit human access, act autonomously, and authenticate through the same credentials that have been ungoverned for decades: service accounts, API keys, OAuth apps, tokens, and secrets.Clutch's Identity Lineage® graph maps every non-human identity, AI agent, and secret to its origin, the people connected to it, and the resources it can reach. That context is what makes risk actionable, detection accurate, and governance possible at scale.Built by practitioners. Trusted by Fortune 500 enterprises.
- Series A
- 77 employees
- Founded 2023
Find engineers at Series A Cybersecurity companies in New York
Searching for “engineers at top Series A 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 A, by current headcount, drawn from public LinkedIn and Crunchbase records. With 33 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 A, 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.
Refolk converts this list into a live search. Ask for “senior engineers at Series A Cybersecurity companies in New York hiring” or “founders of Series A Cybersecurity companies in New York who left in the last year” and Refolk returns a ranked shortlist with the evidence behind each match.
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Last refreshed: Wed, 05 Aug 2026 21:29:16 GMT
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How is this ranking built?
The list draws on the public company graph - headcount and growth signals, funding history, and recency. The criteria chips at the top show exactly which filters produced it, and the methodology section explains the ranking.
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- Staff backend engineers in NYC who shipped Rust in production
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