New York is home to major banks, hospitals, and tech firms that rely on constant digital protection. Now, as these companies deploy AI agents, attackers have found new ways to target them. Securing cloud apps, private data, and physical systems requires a brand-new approach.
Here are 15 cybersecurity startups in New York tackling these challenges in 2026. Each was chosen for its funding momentum, practical solutions, and strong connection to the New York market.
15 Cybersecurity Startups in New York Building the Future of Threat Defense
Cybersecurity matters because one breach can cause major financial loss. IBM’s 2026 report found that the average cost of a data breach in the U.S. reached $10.22 million.
This list of NYC cybersecurity startups was selected based on recent funding, New York ties, product focus, and the security problems each company aims to solve. It includes both established firms and newer startups across AI security, data protection, and more. The companies are not ranked.
1. Cyera
Cyera is one of the cybersecurity startups in New York helping firms find and protect sensitive data in cloud and AI systems. In June 2026, it raised $600 million in Series G funding at a $12 billion valuation. Its appeal is its size and focus on a clear need: knowing what data AI can access.
2. Onyx Security
Onyx Security helps firms control AI systems and agents. The New York and Tel Aviv firm raised $113 million in Series B funding in July 2026. Total funding reached $153 million. Investors should watch customer growth and competition as more security firms enter the AI market.
3. Vega
Vega builds security analytics tools that use AI to spot and respond to threats. In February 2026, it raised $120 million in Series B funding. Total funding reached $185 million. Security teams have many tools to manage. Vega aims to give them a better single view. Investors should watch repeat sales and sales costs.
4. Torq
Torq uses AI agents to automate security work, such as alert review and response. It announced a $140 million Series D round in January 2026 at a $1.2 billion valuation. Key tests of success are accuracy, trust, and cost savings.
5. Claroty
Claroty protects systems that link computers to real-world equipment in plants, hospitals, and other key sites. It raised $150 million in Series F funding in January 2026 to fuel growth. Investors should watch sales time, setup time, and renewals. These can shape growth in a market with long buying cycles.
6. Linx Security
Linx Security is among the cybersecurity startups in New York focused on managing access for people, machines, apps, and AI agents. It raised $50 million in Series B funding in March 2026, taking total funding to $83 million. The market is growing as more systems need their own digital IDs. That can make identity control a larger part of security budgets.
7. GitGuardian
GitGuardian helps teams find exposed passwords, keys, and tokens in code. It raised $50 million in Series C funding in February 2026, led by Insight Partners. For investors, watch user growth and expansion beyond code scanning. A wider product range could help the company reach more security teams.
8. Reco
Reco helps firms find and secure SaaS and AI apps. In February 2026, it raised $30 million in Series B funding. Total funding reached $85 million. More workers now use cloud apps and AI tools. Investors should keep an eye on whether Reco becomes a core security tool or stays a small add-on.
9. Runlayer
Runlayer helps firms build and manage AI agents while keeping access controls in place. It raised $30 million in Series A funding in June 2026, bringing total funding to $42 million. Investors should watch paid use and daily use. The key question is how fast firms move from AI tests to real work.
10. Frame Security
Frame Security focuses on human risk, such as phishing, deepfakes, and social tricks. The New York and Tel Aviv startup launched in May 2026 with $50 million in funding. AI can make fake messages and images more real. The key test of growth is whether the product cuts real attacks.
11. Cinder
Cinder builds tools to fight digital abuse and manipulation. In May 2026, it raised $41 million in Series B funding and opened its main office in New York City. Its market sits between cybersecurity and trust and safety. For investors, check whether demand spreads beyond online platforms.
12. Astelia
Astelia helps teams find the weaknesses that create the most risk. In February 2026, the New York firm announced $35 million in seed and Series A funding. Its pitch is focused on better risk choices. Look for proof of faster fixes and less risk.
13. Beacon Security
Beacon Security is building an AI platform for security teams. In July 2026, it raised $13 million in seed funding, led by Notable Capital. It is still an early-stage bet. Watch customer growth, usage, and results versus older tools.
14. Cantina
Cantina helps teams find and fix security flaws with automation. It came out of stealth in July 2026 with $8 million in new funding. Total funding reached $16.5 million. The company targets a basic problem: security teams have more flaws to fix than time to fix them. Test whether its tools save time without missing major risks.
15. Project Eleven
Project Eleven works on security for the post-quantum era. It raised $20 million in Series A funding in January 2026. This is a long-term, high-risk theme. Investors should watch tech progress and market timing.
More Info: Top 9 SaaS Companies in NYC: Leaders, Unicorns, and Rising Startups
Why are Cybersecurity Startups in New York Attracting Investors?
New York gives security startups access to big buyers in finance, health care, media, and tech. These sectors hold valuable data and face high security needs. The city also has many investors and a large pool of tech talent.
One major theme in 2026 is AI security. CrowdStrike’s 2026 Global Threat Report found that attacks by AI-enabled adversaries increased by 89%. AI agents can also access systems, data, and tools, creating new risks around access and control. Funding for Onyx, Runlayer, and Beacon shows investor interest in this market.
Still, the market is crowded. Sales can take time, and customer needs can change fast. In addition, the competition is strong.
What Should Investors Check Before Backing a Cybersecurity Startup?
When reviewing cybersecurity startups in New York, do not use funding size as the main test. Shlomo Kramer, a longtime cybersecurity entrepreneur and investor, advises that the product should have a clear hook, the potential to become a platform, and the ability to be monetized. This is especially important in a crowded security market. He also said that every startup needs a “good combination of team, market, product.”
- Problem: Is the risk urgent and costly?
- Buyer: Who owns the budget?
- Product: Does it solve the problem better than current tools?
- Proof: Are customers renewing and expanding?
- Economics: Are margins and sales costs healthy?
- Moat: Does the firm have strong data, tech, or integrations?
- Scale: Can it sell beyond one niche?
- AI value: Does AI create real demand, or is it mostly part of the pitch?
For early firms, product fit and customer growth may matter most. For later firms, also study retention, margins, sales costs, and the exit path.
Learn More: 25 NYC Startups Everyone Will Be Talking About in 2027
Conclusion
The current group of cybersecurity startups in New York shows how broad the market is. Large rounds are going to data security, AI control, security work, and critical systems. Younger firms target identity, agent security, flaws, and new digital risks.
That range gives investors many ways to enter the market. It also makes careful checks more important. A large round can show investor interest, but it does not prove a strong business. Retention, product value, tech strength, market size, and costs still matter.
FAQs
1. What are the top cybersecurity startups in New York?
Cyera, Onyx Security, Vega, Torq, and Claroty are among the notable companies that raised large rounds in 2026.
2. What types of cybersecurity companies are investors funding?
Key areas include AI security, data protection, identity, and security operations. Other areas include SaaS security, vulnerability management, and critical systems.
3. Why is New York a strong cybersecurity hub?
New York combines large enterprise buyers, skilled tech workers, venture capital, and finance companies.
4. How should investors evaluate cybersecurity startups?
Review market needs, customer retention, product strength, margins, tech advantage, competition, and the team’s ability to scale.
5. Are investors still funding cybersecurity startups in New York?
Yes. 2026 has included deals from seed rounds to more than $100 million for later-stage security companies.
Sources:
