AppOmni Marlin AI vs Co-Brain Questionnaire Agent
Quick answer
AppOmni Marlin AI (autonomous SaaS and agentic-AI risk investigation) (AppOmni) and Co-Brain Questionnaire Agent (security questionnaire automation) (Co-Brain (Co-Brain GmbH)) are both listed in the Security category of Agent Index.
They share no framework tags in our dataset.
This is not a ranking.
AppOmni Marlin AI (autonomous SaaS and agentic-AI risk investigation) (AppOmni) and Co-Brain Questionnaire Agent (security questionnaire automation) (Co-Brain (Co-Brain GmbH)) are both listed in the Security category of Agent Index. They share no framework tags in our dataset. Only Co-Brain Questionnaire Agent (security questionnaire automation) is tagged for DORA.
| Field |  AppOmni Marlin AI (autonomous SaaS and agentic-AI risk investigation) |  Co-Brain Questionnaire Agent (security questionnaire automation) |
|---|---|---|
| Vendor | AppOmni | Co-Brain (Co-Brain GmbH) |
| HQ | United States · North America | Germany · Europe |
| Primary category | Security | Security |
| Also listed in | Security | Security, Compliance, Risk |
| Summary | US SaaS-security product whose Marlin AI engine autonomously correlates posture, identity and threat signals across SaaS and AI apps, opens investigations without a prompt, and delivers expert-guided remediation steps so teams can cut investigation and resolution time. | 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. |
| Frameworks (vendor-stated) | — | DORA |
| Frameworks (vendor-claimed) | FedRAMP, SOC 2, HIPAA, GDPR | TISAX, ISO 27001, DORA, GDPR |
| Capabilities / tasks | alert triage, case investigation, security operations, identity governance | questionnaire automation, workflow automation |
| Pricing (as published) | Not published | Not published |
| Pricing model | quote | quote |
| Primary source | https://appomni.com/platform/marlin-ai-autonomous-security/ | https://co-brain.ai/en/questionnaire-agent |
| Last checked | 2026-10-20 | 2026-10-19 |
| Official site | https://appomni.com/platform/marlin-ai-autonomous-security/ | https://co-brain.ai/en/questionnaire-agent |
FAQ (from this dataset)
What is the difference between AppOmni Marlin AI and Co-Brain Questionnaire Agent?
Both are listed under Security. They share no task tags in this dataset. AppOmni Marlin AI-only tasks: alert-triage, case-investigation, security-operations, identity-governance. Co-Brain Questionnaire Agent-only tasks: questionnaire-automation, workflow-automation. Differences are from stored category and task tags, not a ranking.
Which one publishes pricing?
AppOmni Marlin AI (autonomous SaaS and agentic-AI risk investigation): Not published Co-Brain Questionnaire Agent (security questionnaire automation): Not published
Where are AppOmni Marlin AI and Co-Brain Questionnaire Agent headquartered?
AppOmni Marlin AI (autonomous SaaS and agentic-AI risk investigation) publishes HQ in United States. Co-Brain Questionnaire Agent (security questionnaire automation) publishes HQ in Germany.
Also in this use case
Other verified listings that share a task tag or use-case group with AppOmni Marlin AI (autonomous SaaS and agentic-AI risk investigation) or Co-Brain Questionnaire Agent (security questionnaire automation). Open a pair page or the use-case table — this is not a ranking.
- Covasant TPRM (agentic third-party risk management) — Third-party risk product from Hyderabad-headquartered Covasant. Purpose-built AI agents onboard vendors through due-diligence workflows, chase vendors who are slow to respond, keep watching news, sanctions and financial data, and, when risk thresholds break, open remediation workflows, track vendor responses, escalate unresolved issues and produce DORA, SOX and NIST reporting packages.
- SOCRadar AI Agents (specialist threat-intelligence, attack-surface, digital-risk and alarm-triage agents) — Roster of specialist agents inside the SOCRadar threat-intelligence platform: customers deploy agents, set each one's skills, scope and access, and green-light sensitive steps. Agents cover threat-actor and ransomware intelligence, detection-rule writing, IoC enrichment, identity/credential exposure, vulnerability analysis, brand and dark-web monitoring, phishing-domain hunting, external attack surface and Shodan recon, and alarm triage that records verdicts and asks before changing an alarm's status. · SOCRadar AI Agents (specialist threat-intelligence, attack-surface, digital-risk and alarm-triage agents) pair comparison
- Strike48 agentic SecOps platform (pre-built SOC agent team and no-code agent builder over federated logs, cloud or air-gapped on-prem) — Agentic orchestration platform for SOC and IT teams from the company behind the Devo log platform: purpose-built micro agents triage and investigate alerts, analyse phishing, hunt threats, write and tune detections and help with compliance over logs queried in place across SIEMs and data lakes, with configurable human approval and an audit trail; available as SaaS, isolated compute or an air-gapped on-prem appliance. · Strike48 agentic SecOps platform (pre-built SOC agent team and no-code agent builder over federated logs, cloud or air-gapped on-prem) pair comparison
- trail Governance Agents (GRC and AI governance agents) — Munich-based trail's Governance Agents run GRC busywork in the background: they read your project files and sources to collect and link evidence, assess controls, classify systems, run risk and vendor assessments and draft policies, proposing changes that a human approves before anything is written.
Use-case comparisons
- AI SOC and security-analyst agents — 51 listings (Security operations, alert investigation and threat detection)
- TPRM and vendor-risk AI agents — 40 listings (Third-party risk, vendor assessments, security ratings and questionnaire automation)
- Security questionnaire AI agents — 10 listings (Inbound security questionnaires, SIG/CAIQ-style responses and questionnaire automation)
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