Co-Brain Questionnaire Agent (security questionnaire automation) vs SentinelOne Purple AI (agentic AI security analyst)
Co-Brain Questionnaire Agent (security questionnaire automation) (Co-Brain (Co-Brain GmbH)) and SentinelOne Purple AI (agentic AI security analyst) (SentinelOne) are both listed in the Security category of Agent Index. They share no framework tags in our dataset. Only SentinelOne Purple AI (agentic AI security analyst) is tagged for FedRAMP, GovRAMP, TX-RAMP.
| Field |  Co-Brain Questionnaire Agent (security questionnaire automation) |  SentinelOne Purple AI (agentic AI security analyst) |
|---|---|---|
| Vendor | Co-Brain (Co-Brain GmbH) | SentinelOne |
| HQ | Germany · Europe | United States · North America |
| Primary category | Security | Security |
| Also listed in | Security, Compliance, Risk | Security, Compliance |
| Summary | German agent that completes incoming security questionnaires (vendor assessments, TISAX, ISO 27001, DORA) in Excel, PDF, Word or vendor portals from the customer's policies, certificates and past answers, with a source citation on every answer, consistent answers to re-worded questions, expert routing and team approval. | 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. |
| Framework tags (Agent Index) | — | FedRAMP, GovRAMP, TX-RAMP |
| FedRAMP (Marketplace, listing scope) | — | SentinelOne Singularity Platform High · FedRAMP Authorized · FR1919071020A · High · authorized 2024-09-10 |
| Frameworks (vendor-claimed) | TISAX, ISO 27001, DORA, GDPR | FedRAMP, GovRAMP, TX-RAMP |
| Capabilities / tasks | questionnaire automation, workflow automation | security operations, alert triage, case investigation, threat detection, government compliance |
| Pricing (as published) | Not published | Purple AI pricing not published; Singularity platform tiers listed from $179.99 per endpoint/year (Complete) and $229.99 (Commercial) on sentinelone.com/pricing. |
| Pricing model | quote | quote |
| Primary source | https://co-brain.ai/en/questionnaire-agent | https://www.sentinelone.com/platform/purple/ |
| Last checked | 2026-10-19 | 2026-10-18 |
| Official site | https://co-brain.ai/en/questionnaire-agent | https://www.sentinelone.com/platform/purple/ |
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 Co-Brain Questionnaire Agent (security questionnaire automation) or SentinelOne Purple AI (agentic AI security analyst). Open a pair page or the use-case table — this is not a ranking.
- Arctic Wolf Aurora Agentic SOC (Swarm of Experts agents) — Agent-led managed SOC on the Aurora Superintelligence Platform: a 'Swarm of Experts' of oversight, authoritative and process agents runs triage, investigation, response, threat hunting, threat intel and detection engineering, with Arctic Wolf's human experts in the loop for novel cases and critical decisions. · Arctic Wolf Aurora Agentic SOC (Swarm of Experts agents) pair comparison
- CLEAR Investigate (agentic AI investigations for government, risk and fraud teams) — Agentic investigation tool built on Thomson Reuters CLEAR public-records data. From a plain-language question it plans and runs searches across CLEAR data and the open web, resolves conflicting records and returns concise cited findings with a record of the searches it ran, for AML, fraud, program-integrity and law-enforcement investigators.
- CleverChain AI agents (VERA autonomous due diligence and LUMA screening) — KYB, KYC, AML and third-party due-diligence platform where the VERA agent runs end-to-end investigations (ownership chain, business activity, sanctions and adverse media) into a cited, policy-mapped report, and LUMA handles AML screening and ongoing monitoring, with analysts approving high-risk decisions.
- Fortinet FortiSOC (agentic AI SOC platform with FortiAI-Assist) — Cloud-delivered SOC platform (SIEM, SOAR, UEBA, ITDR, threat intelligence and case management in one SaaS) whose agentic AI investigates and correlates alerts across assets and identities, then recommends or executes response actions under analyst oversight. · Fortinet FortiSOC (agentic AI SOC platform with FortiAI-Assist) pair comparison
- NTT DOCOMO BUSINESS WideAngle AI SOC (AI Agent log analysis with managed SOAR auto-response) — Japanese managed AI SOC service in which NTT DOCOMO BUSINESS's own AI Agent periodically reviews Microsoft Sentinel incidents, correlates endpoint, network and authentication logs and writes an analysis report back, and Sentinel's managed SOAR playbooks then respond to the alerts automatically, with NTT security experts on call. · NTT DOCOMO BUSINESS WideAngle AI SOC (AI Agent log analysis with managed SOAR auto-response) pair comparison
- Optivalue.ai questionnaire agents (security questionnaires, TISAX and third-party collection) — French platform whose agents answer incoming security questionnaires, TISAX catalogues, DDQs and tenders from the customer's own evidence with document, page and version on every answer, score and gap-check the result and draft missing documents with the team before named sign-off, while its Reach product sends questionnaires to suppliers and chases non-responders automatically. · Optivalue.ai questionnaire agents (security questionnaires, TISAX and third-party collection) pair comparison
- RiskXchange The Agency (32 AI agents for third-party risk) — AI workforce of five lead agents and 27 specialists that runs third-party risk end to end: vendor outreach, onboarding and questionnaire chasing, document assessment, outside-in breach and score monitoring, regulatory gap analysis and remediation, and regulator-ready reporting, with Manual, Assisted or Autonomous mode set per vendor.
- Vulcan Justinian (AI agent for government legal, regulatory and permitting work; VulcanGov) — AI agent for US government knowledge workers, grounded in a large corpus of federal and state statutes, regulations, court cases and fiscal data. It runs 50-state research in parallel with citations, monitors legal changes, reviews permit applications against the code, drafts memos and comment responses, and builds internal tools inside the agency boundary.
- Zscaler Agentic SOC (specialized AI agents for triage, investigation and inline containment) — AI-first security operations product launched September 2026. Specialized autonomous AI agents triage alerts, investigate root cause, assign evidence-backed verdicts and trigger response workflows, and Zscaler's inline Zero Trust controls can automatically isolate users, block command-and-control traffic and cut off lateral movement. · Zscaler Agentic SOC (specialized AI agents for triage, investigation and inline containment) pair comparison
Use-case comparisons
- AI SOC and security-analyst agents — 33 listings (Security operations, alert investigation and threat detection)
- TPRM and vendor-risk AI agents — 23 listings (Third-party risk, vendor assessments, security ratings and questionnaire automation)
- US public-sector and FedRAMP AI agents — 24 listings (US government, FedRAMP and public-sector compliance or security operations)
- Security questionnaire AI agents — 7 listings (Inbound security questionnaires, SIG/CAIQ-style responses and questionnaire automation)
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