Prophet Security vs Legion Security
Prophet Security
Prophet Security builds an agentic AI SOC platform whose main component, Prophet AI SOC Analyst, autonomously triages, investigates and responds to security alerts, alongside an AI Threat Hunter and an AI Detection Advisor aligned to MITRE ATT&CK. The platform shows its full reasoning, investigation plans, queries and evidence for each investigation. It deploys by taking read-only API access to existing tools such as SIEM, identity providers, cloud platforms and EDR, and returns results in an investigation workbench. The company was co-founded by Kamal Shah and Vibhav Sreekanti, whose prior company StackRox was acquired by Red Hat.
Pros
- Raised a $30M Series A led by Accel with participation from Bain Capital Ventures, following an $11M seed led by Bain Capital Ventures (Pulse2, Help Net Security)
- Founders' prior company StackRox was acquired by Red Hat (company blog)
- Company reports over 1 million investigations conducted and 360,000 analyst hours saved in a six-month period (Pulse2, company-reported)
- Docker is a named customer with an executive quote in funding coverage (Pulse2)
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Legion Security
Legion Security offers an agentic AI security operations platform that deploys through the analyst's browser rather than through API integrations. The system observes analyst investigations, playbooks and past cases in a learning mode, then executes workflows in the browser with human oversight (companion mode) or with reduced intervention (autonomous mode). Press coverage describes it as a browser extension AI SOC companion that works across tools such as Chrome, Edge and Island. The company was founded in 2024 by former Microsoft Sentinel team members and emerged from stealth in July 2025.
Pros
- Raised $38M total: an $8M seed led by Picture Capital and Accel, and a $30M Series A led by Coatue (Calcalist, Fortune)
- Founding team includes former members of Microsoft's Sentinel product, per Calcalist
- Browser-based deployment is designed to avoid custom API integration work, per the company
- Customers cited on the vendor site report outcomes such as an 81% reduction in MTTI/R (WELL Health Technologies, vendor-cited)
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