Radiant Security

One-liner — An AI SOC platform/“co-pilot” that automatically triages and investigates every alert across all data sources — no playbooks or preset rules — and drives containment and remediation.

What it does — Radiant ingests alerts from your existing tooling and uses generative AI / LLMs to triage, investigate, and decide on each one, then automates containment, remediation, and escalation approvals. It markets itself as handling every alert type across all sources with no playbooks required, deployed via API in minutes, claiming up to ~95% reduction in analyst workload. The job is the same as its peers: collapse the Tier-1 triage burden and speed response.

Where it sits in the stack — ai-soc-analysts, Foundation layer; automation/decision layer over siem-soc and edr-xdr. SOC-ops tooling — not an inline prompt/egress control. Trusted security-ops zone.

Deployment & architecture — SaaS, API-deployed; reads from SIEM/EDR/cloud/identity sources and writes investigations/actions back. Emerged from stealth at Black Hat 2023.

Positioning & differentiators — Leadership drawn from former Imperva and Exabeam executives (SIEM/SOC pedigree). Differentiates on the “no-playbook, every-alert-type” claim and tight investigation→response automation. Nearest neighbors: prophet-security, dropzone-ai, 7ai, simbian, torq.

Ownership, funding & M&A — Independent, VC-backed. $15M Series A (Nov 2023) led by Next47 (Siemens’ venture arm), with Lightspeed Venture Partners, Acrew Capital, Uncorrelated Ventures, Jibe Ventures; total ~$22.5M. No M&A; no seed acquisition flag.

Note (resolved, not a contradiction): early web results conflated “Radiant Security” with an unrelated company, Radiant (nuclear microreactors), which raised ~$300M Series D in 2025 with DCVC participating. That is a different company; Radiant Security’s last confirmed round is the 2023 Series A.

HQ: SecurityWeek lists San Francisco; CB Insights lists Milpitas, CA — both SF Bay Area (soft discrepancy, recorded as “SF Bay Area”).

CTO / hedge-fund lens — Day-2. Standard for this category: needs an existing SIEM/EDR and real alert volume. Smaller raise / older vintage than 7ai or torq — evaluate runway and roadmap. Fits a mid-to-large shop with an in-house SOC; a 50-person fund would more likely get this via an MDR. No direct SR 11-7 angle; diligence autonomous-action scope and data handling.

Competitors / alternatives — prophet-security, dropzone-ai, 7ai, simbian, torq.

Open questions / to verify — Exact HQ city; precise total funding (profiles vary $15M–$22.5M); any 2024-2025 raise; founder names; how autonomous the remediation actions are by default.

Sources

• Radiant Snags $15 Million for AI-Powered SOC Technology (SecurityWeek) — fetched 2026-06-28 — supports: $15M Series A, investors, product, exec pedigree; confidence: med.
• Radiant Security — Crunchbase profile — fetched 2026-06-28 — supports: total funding ~$22.5M, independence; confidence: low-med (aggregator).

History

• [2026-06-28] Stub created from seed registry.
• [2026-06-28] Researched; established $15M Series A (Next47, 2023-11), ~$22.5M total, SF-Bay-Area HQ, ex-Imperva/Exabeam leadership, independent. Disambiguated from unrelated “Radiant” nuclear company (DCVC) that some searches surfaced. Set ownership_confidence high. Not an inline prompt/egress control. hedge_fund_fit=medium (Day-2).