Legion Security vs Andesite AI
Legion Security
Legion Security helps enterprise security teams scale detection, investigation and response using agentic AI. The platform learns from the real workflows security teams already run, across the SOC and beyond, and turns that institutional knowledge into agentic playbooks the team can trust and audit. This lets organisations adopt frontier AI models gradually while preserving operational trust, cutting manual effort and building toward autonomous security capabilities. Rather than depending on API integrations, Legion combines vision models with other methods to observe how practitioners actually work, so teams can codify those processes as they are or optimise them into transparent, inspectable agentic workflows, extending the same approach beyond the SOC to security operations across the enterprise. Legion Security has offices in New York and Tel Aviv and is backed by Coatue, Accel and Picture, with investors from Island, CrowdStrike, Wiz and Google DeepMind. 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)
Pricing:
Andesite AI
Andesite AI, based in McLean, Virginia, sells what it calls the Human-AI SOC, connecting SIEM, SOAR, identity and other sources so configurable agents can automate investigation, high-volume alert handling and enrichment. Vendor pages describe threat hunting to determine scope, assessing scope and blast radius, and launching remediation directly from investigation findings, with an Evidentiary AI audit trail behind each conclusion. Founded in 2023, it has raised $38.25m from General Catalyst and Red Cell Partners, and announced FedRAMP High Authorized status on 31 March 2026. Deployment is SaaS, air-gapped self-managed, or hybrid.
Pros
- FedRAMP High Authorized status announced March 2026 (vendor press release)
- Air-gapped self-managed deployment is offered, which is rare in this category (vendor FAQ)
- SOC 2 Type II and ISO 27001, 27701 and 42001 stated by the vendor on the product page
- $38.25m raised from General Catalyst and Red Cell Partners (vendor release; SiliconANGLE February 2025)
Pricing: Not published. The vendor FAQ describes pricing as outcome-based rather than AI-usage-based; contact sales.