Horizon3.ai NodeZero (autonomous pentesting) vs ReliaQuest GreyMatter Agentic Teammates (GreyMatter for Government)
Horizon3.ai NodeZero (autonomous pentesting) (Horizon3.ai) and ReliaQuest GreyMatter Agentic Teammates (GreyMatter for Government) (ReliaQuest) are both listed in the Security category of Agent Index. They share no framework tags in our dataset. Only ReliaQuest GreyMatter Agentic Teammates (GreyMatter for Government) is tagged for FedRAMP, TX-RAMP.
| Field |  Horizon3.ai NodeZero (autonomous pentesting) |  ReliaQuest GreyMatter Agentic Teammates (GreyMatter for Government) |
|---|---|---|
| Vendor | Horizon3.ai | ReliaQuest |
| HQ | United States · North America | United States · North America |
| Primary category | Security | Security |
| Also listed in | Security | Security, Compliance |
| Summary | Autonomous pentesting platform that runs unlimited self-directed internal, external, cloud, Kubernetes and AD pentests, plans attack paths, guides remediation and re-tests to verify fixes. | Agentic AI security operations platform whose six persona-based Agentic Teammates investigate and triage alerts and execute approved containment actions; GreyMatter for Government is FedRAMP Authorized (Moderate). |
| Framework tags (Agent Index) | — | FedRAMP, TX-RAMP |
| Frameworks (vendor-claimed) | FedRAMP | FedRAMP, TX-RAMP, FISMA, CMMC, SOC 2, ISO 27001, HIPAA, PCI DSS |
| FedRAMP (Marketplace, listing scope) | — | GreyMatter for Government · FedRAMP Authorized · FR2428740308 · Moderate · authorized 2026-07-08 |
| Capabilities / tasks | pen test management, attack surface, exposure management, vulnerability management | security operations, alert triage, incident response, threat detection, government compliance |
| Pricing (as published) | Not published | Not published (vendor says pricing is based on endpoint count with no AI usage meter). |
| Pricing model | quote | quote |
| Primary source | https://horizon3.ai/nodezero/ | https://reliaquest.com/security-operations-platform/greymatter-agentic-teammates/ |
| Last checked | 2026-10-18 | 2026-10-18 |
| Official site | https://horizon3.ai/nodezero/ | https://reliaquest.com/security-operations-platform/greymatter-agentic-teammates/ |
Side-by-side data is generated from the open dataset. “Vendor-claimed” frameworks are as marketed by each vendor and not verified by Agent Index; framework tags indicate relevance, not certification. Request current quotes from each vendor before buying. This page does not rank or score vendors. Sponsored comparisons, if any, will be labelled.
Also in this use case
Other verified listings that share a task tag or use-case group with Horizon3.ai NodeZero (autonomous pentesting) or ReliaQuest GreyMatter Agentic Teammates (GreyMatter for Government). Open a pair page or the use-case table — this is not a ranking.
- 7AI agentic security platform — Boston-based agentic security platform where swarms of specialised AI agents categorise, investigate and reach a determination on every alert, escalating only what needs a person, with optional managed service (PLAID ELITE). · 7AI agentic security platform pair comparison
- Abnormal AI Security Mailbox (Abnormal AI for Government) — Autonomous agent for email security operations that triages user-reported emails, removes related malicious campaign messages across the organisation and replies to reporters; included in Abnormal AI for Government, which is FedRAMP and GovRAMP Moderate authorized. · Abnormal AI Security Mailbox (Abnormal AI for Government) pair comparison
- AWS Continuum for penetration testing (formerly AWS Security Agent) — AWS frontier agent (formerly AWS Security Agent) that runs on-demand penetration tests of your applications with tailored multi-step attack scenarios, reproducible proof and ready-to-implement fixes, billed per task-hour. · AWS Continuum for penetration testing (formerly AWS Security Agent) pair comparison
- D3 Morpheus (agentic AI SOC platform) — Agentic SOC platform that autonomously triages, investigates and responds across the full alert lifecycle, grading every verdict by its evidence and deferring to a human when uncertain. · D3 Morpheus (agentic AI SOC platform) pair comparison
- Imperum Virtus AI SOC agents (Triage, Pilot, Email Phishing) — Amsterdam-built autonomous SOC platform whose Virtus agents triage every alert through a 7-stage pipeline, return a verdict with confidence and evidence, and hand cases to an investigation agent, with sovereign/on-prem AI options. · Imperum Virtus AI SOC agents (Triage, Pilot, Email Phishing) pair comparison
- Patrowl Agentic AI Penetration Testing — Continuous external pentesting in which Patrowl's AI agents correlate assets, threats and past evidence, choose the next test step every day, and route every finding through a certified pentester before it reaches you. · Patrowl Agentic AI Penetration Testing pair comparison
- Pega AI agents (Pega Cloud for Government) — Enterprise workflow platform whose AI agents (Coach, Knowledge Buddy, Automate, developer agents and the Blueprint design agent) run on Pega's trusted workflows; Pega Cloud for Government, including these gen AI agents, is FedRAMP High authorized.
- Prophet AI (AI SOC Analyst, Threat Hunter and Detection Engineer agents) — Agentic AI SOC platform whose agents investigate every alert end to end, respond through scoped Agent Actions autonomously or with sign-off, hunt threats and tune detections. · Prophet AI (AI SOC Analyst, Threat Hunter and Detection Engineer agents) pair comparison
- RunSybil Sybil (AI offensive security / autonomous pentesting) — AI offensive security platform whose agents run black- or white-box autonomous pentests, chain vulnerabilities across code, APIs, cloud and infrastructure, reproduce every finding, and re-test on each deployment. · RunSybil Sybil (AI offensive security / autonomous pentesting) pair comparison
- SentinelOne Purple AI (agentic AI security analyst) — Agentic AI security analyst in the Singularity platform that runs alert investigations to a verdict and, with Singularity Hyperautomation, triggers response within pre-approved policies; SentinelOne says Purple AI is FedRAMP High authorized. · SentinelOne Purple AI (agentic AI security analyst) pair comparison
- Workiva Agent Studio (finance, audit and GRC agents) — No-code agent builder and prebuilt agents on Workiva's reporting, audit and GRC platform, used for finance tie-outs and roll-forwards and for evidence collection, control testing and remediation, with configurable review and approval steps.
- YesWeHack Agentic Pentest — On-demand pentests of external attack surface run by AI agents shaped by YesWeHack's bug-hunting expertise, with dedicated verification agents, a Pentest Manager, same-day results and reports in its vulnerability-management platform. · YesWeHack Agentic Pentest pair comparison
Use-case comparisons
- AI SOC and security-analyst agents — 20 listings (Security operations, alert investigation and threat detection)
- Agentic pentesting AI agents — 10 listings (Autonomous or AI-assisted penetration testing, attack-surface testing and exploitable-path verification)
- US public-sector and FedRAMP AI agents — 15 listings (US government, FedRAMP and public-sector compliance or security operations)
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