Arcanna is the Trust Layer for AI in the SOC: one platform for grounded decisions and governed agentic investigations. Two core components work together. The Decision Layer grounds every verdict in your team's trained judgment, per tenant, with confidence and supporting context. The Investigation Layer runs agentic investigations in minutes, gathering missing evidence within the same tenant boundary and working inside the guardrails of those decisions. Adoption is gradual: Shadow, Suggest, then Auto-close once trust is established.