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    AI security and cyber threats, ranked by the attack you're facing.

    Independent rankings of the firms that defend against AI-powered attacks, deepfake fraud and ransomware, plus plain guides for locking down AI agents and your own team. New AI security lists, comparisons and guides appear here as soon as they’re published.

    • 63 Guides and ranked lists
    • 17 Location lists
    • 71 Domain Rating

    Cybersecurity companies by city and industry

    All 21

    Ranked cybersecurity firms for banks, healthcare, law, accounting, dental, real estate and small businesses, plus city lists from New York to Seattle.

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    Ransomware, fraud and threat response

    All 16

    Ransomware recovery, immutable backup, ITDR, forensics, email and BEC defense, deepfake detection, and how MDR, MSSP and SOC models compare.

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    Patching and vulnerability remediation

    All 2

    Services that close the gaps AI-assisted attackers find first, from patch management to vulnerability remediation.

    Pentesting, AI red teaming and code security

    All 8

    Penetration testing firms by city, AI red teaming, AI-generated code review, and alternatives to the big pentest platforms.

    Securing LLMs and AI agents

    All 5

    AI security companies and tools for prompt injection, agent permissions and MCP integrations, plus guides to locking agents down.

    Compliance, governance and cyber risk

    All 7

    SOC 2, NYDFS, FedRAMP, AI governance, vendor risk, cyber insurance readiness and post-quantum cryptography consultants.

    Guides to AI-era threats

    All 9

    Plain guides on deepfake CEO fraud, AI-powered attacks on law firms, security awareness training and what AI changes for defenders.

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    Ranked Lists

    Compare AI security and threat defense providers

    Our editorial rankings of AI security firms, threat response providers and testing companies. Sponsored placements are always labeled.

    Overall

    Total articles: 26
    Show 21 more Show less — Overall

    For Businesses

    Total articles: 8
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    For People and Executives

    Total articles: 1

    By Sector

    Total articles: 18
    Show 13 more Show less — By Sector

    Common questions

    What is AI security?

    AI security covers two jobs: protecting the AI systems your business runs (LLM apps, agents and MCP integrations) from prompt injection, data leakage and excessive permissions, and defending the business against attackers who use AI for phishing, deepfakes and faster exploitation. Most firms on this hub specialize in one side, so start by naming which problem you have.

    How do deepfake and voice clone fraud attacks work?

    Attackers clone an executive’s voice or face from public video and recorded calls, then pressure finance or IT staff to approve a payment, reset credentials or share data. The strongest defenses pair detection tools on calls and video with process controls: callback verification, dual approval for payments and a code word for urgent requests.

    Do I need AI red teaming or a regular penetration test?

    A penetration test checks your networks, apps and cloud for exploitable flaws. AI red teaming targets the model and agent layer: jailbreaks, prompt injection, data exfiltration through tools and unsafe autonomous actions. If you ship an LLM feature or connect agents to internal systems, you need both.

    How does ReVerb rank these companies?

    Our lists are editorial. We compare each firm on specialization, verified certifications, public client work, team depth and how clearly it scopes and prices engagements. Placement is never sold, and any sponsored slot is labeled.

    Run an AI security or cybersecurity firm?

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