Series B Cybersecurity companies in New York

AppViewX is trusted by the world’s leading enterprises to prevent outages, reduce risk, and ensure compliance through automated Certificate Lifecycle Management (CLM) and PKI solutions. Our platform delivers end-to-end visibility, automation, and policy control while enabling crypto-agility. Today, mid-size enterprises to Fortune 500 companies—including 6 of the top 10 global banks and 5 of the top 10 healthcare providers—rely on AppViewX as the foundation for their digital trust.

• Series B
• 561 employees
• Founded 2008

Adaptive Security is the security layer for the AI era, protecting organizations and their employees from modern cyberattacks. AI has changed how every company works, and it's changed how every company gets attacked. Employees use AI tools IT doesn't know about. Attackers craft deepfakes, vishing calls, and spear phishing emails that get past filters. Adaptive addresses all of it in one unified platform: managing AI tool usage before it becomes a liability, training employees on the threats they'll actually face, simulating AI-powered attacks in a safe environment, and protecting the inbox and browser so threats never reach their intended targets. Because it's one platform, Adaptive develops a complete risk picture and uses it automatically, applying targeted training, attack simulations, real-time interventions, and policy controls to lower risk over time. More than 1,000 organizations run Adaptive to manage their human security program, and the company has raised $150M+ from investors including NVIDIA, Andreessen Horowitz, Bain Capital Ventures, and Citi Ventures.

• Series B
• 272 employees
• Founded 2024

CertiK is the largest Web3 security services provider, founded in December 2017 in New York by two professors from Yale and Columbia University.CertiK offers a wide range of products and services to support the Web3 industry, project teams, and users alike. CertiK's products and services span the entire lifecycle of project development, from incubation and early stages, to growth and maturity. CertiK is one of the most globally recognized companies in the Web3 industry, serving users across 150 countries/regions.To date, CertiK has worked with more than 5,000 enterprise clients, secured over $600 billion worth of digital assets, and detected more than 180,000 vulnerabilities in blockchain code. CertiK's clients include industry-leading projects such as Aptos, Ripple, Sandbox, Polygon, BNB Chain, and TON.Since its inception, CertiK has secured investments from 12 top-tier funds, including Sequoia, Coatue, Goldman Sachs, Shunwei Capital and Insight Partners, with a valuation of more than $2 billion. With a highly skilled technical team, CertiK stands out for its expertise in formal verification technology, artificial intelligence, and academia. CertiK's leaders also collaborate closely with global government bodies to develop supportive Web3 compliance and regulatory frameworks.

• Series B
• 206 employees
• Founded 2018

Sentra is the AI Data Readiness and Data Security Posture Management (DSPM) platform for the enterprise.Organizations are deploying AI agents, Copilots, and LLM pipelines faster than they're governing the data underneath them. Sentra fixes that. We discover, classify, and secure the sensitive data across your entire data estate - cloud, SaaS, and on-premises - so AI systems only reach what they're supposed to reach.What we do: - Continuous data discovery and classification across AWS, Azure, GCP, Salesforce, Databricks, Snowflake, and more - 98% classification accuracy, context-aware and without custom rules - AI data governance: know what your Copilot, agents, and RAG pipelines can access before go-live - Least privilege enforcement at the data layer to reduce breach blast radius - Agentless, in-environment scanning; no data ever leaves your environment - Compliance-ready posture for GDPR, HIPAA, CCPA, PCI, EU AI Act, and moreWho we work with: CISOs, security engineers, data privacy officers, and cloud architects at enterprises who can't afford to find out what their AI can see after the fact.Real findings in week one. No tuning. Petabyte scale.🌐 sentra.io

• Series B
• 204 employees
• Founded 2021

OX Security removes risk at the source - eliminating exposures from AI code generation through cloud runtime - preventing security debt before it ever reaches production. Unlike conventional tools that cannot keep pace with modern, AI-driven development, or cloud-specific solutions that are infrastructure-only, the OX Platform pinpoints vulnerabilities at creation and remediates runtime exposures at the source.

• Series B
• 204 employees
• Founded 2021