Skip to content
whatismyalternative

Antigen

AI-powered continuous pentesting

Visit Antigen

Antigen is a continuous offensive security platform that maps an organization's attack surface, exploits vulnerabilities, opens pull requests with fixes, and retests remediations. An AI agent called tCell performs the attacks, chaining weaknesses into working attack paths and attaching reproducible exploits to each finding, while a dedicated human security expert reviews findings before they reach the customer.

The platform includes an Infrastructure Graph that assembles a live map of exposed assets, a vulnerability board tracking findings through discovery, remediation, and verification, and integrations with services such as AWS, GitHub, Linear, Okta, Vercel, and Supabase. Antigen writes fixes as pull requests for engineer review, updates project management tools, and reattempts exploits after deployment. Enterprise features include data retention policies, audit trails, SAML/IdP single sign-on, and an API/SDK for CI/CD pipelines. Deployment is available as a managed service or self-hosted within your own network on AWS, Azure, GCP, or Kubernetes.

Antigen is built for software teams, financial services, healthcare, and government organizations. Pricing details are not shown.

12 alternatives to Antigen

Ranked by how well each tool replaces Antigen: shared features, audience, price and popularity.

  1. The always-on AI security engineer

    Covers 13 of 15 key features, has a free plan and is open source.

    Free planOpen source
    68 out of 100 matchFree
  2. An AI agent platform that reasons across code, infrastructure and runtime to identify what

    Covers 12 of 15 key features.

    67 out of 100 matchContact sales
  3. Application security built and trusted by hackers.

    Covers 10 of 15 key features and has a free plan.

    Free plan
    66 out of 100 matchContact sales
  4. Continuous Threat Exposure Management platform combining AI with a community of security

    Covers 6 of 15 key features.

    66 out of 100 matchContact sales
  5. Offensive security for teams that are 100x outnumbered.

    Covers 9 of 15 key features.

    65 out of 100 matchContact sales
  6. AI-powered continuous pentest platform for apps, APIs and cloud

    Covers 7 of 15 key features.

    65 out of 100 match$69/mo
  7. Continuous pentesting for teams that ship every day. Surface to seabed.

    Covers 12 of 15 key features.

    64 out of 100 match—
  8. Agentic AI security platform covering API discovery, posture management, and runtime threa

    Covers 10 of 15 key features.

    64 out of 100 match—
  9. Human-centric cybersecurity protecting people, data and brands against cyber attacks

    Covers 8 of 15 key features.

    63 out of 100 match—
  10. The AI operating system for end-to-end third-party cyber risk management

    Covers 7 of 15 key features and has a free plan.

    Free plan
    63 out of 100 matchContact sales
  11. AI-powered next-gen SIEM for cloud-first environments

    Covers 4 of 15 key features.

    63 out of 100 matchContact sales
  12. Harden the logic. Secure the code. Automate the rest.

    Covers 7 of 15 key features.

    62 out of 100 matchContact sales