Co-Brain Questionnaire Agent vs Plerion Pleri
Quick answer
Co-Brain Questionnaire Agent (security questionnaire automation) (Co-Brain (Co-Brain GmbH)) and Plerion Pleri (AI security engineer) (Plerion) are both listed in the Security category of Agent Index.
They share no framework tags in our dataset.
This is not a ranking.
Co-Brain Questionnaire Agent (security questionnaire automation) (Co-Brain (Co-Brain GmbH)) and Plerion Pleri (AI security engineer) (Plerion) 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 |  Co-Brain Questionnaire Agent (security questionnaire automation) |  Plerion Pleri (AI security engineer) |
|---|---|---|
| Vendor | Co-Brain (Co-Brain GmbH) | Plerion |
| HQ | Germany · Europe | Australia · Australia and New Zealand |
| Primary category | Security | Security |
| Also listed in | Security, Compliance, Risk | Security |
| 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. | Sydney-based cloud and AI security platform with Pleri, an agent that investigates findings, checks real exploitability, raises fix PRs and Jira tickets, and follows each change through to merge. |
| Frameworks (vendor-stated) | DORA | — |
| Frameworks (vendor-claimed) | TISAX, ISO 27001, DORA, GDPR | — |
| Capabilities / tasks | questionnaire automation, workflow automation | cloud security, vulnerability management, remediation, exposure management |
| Pricing (as published) | Not published | Published estimator on plerion.com/pricing: a fixed monthly Plerion bill set by combined monthly AWS/Azure/GCP spend (example shown: $100,000–$130,000 cloud bill → about $3,100–$3,700/month, USD), all capabilities and the agent included; 'Start free' option. |
| Pricing model | quote | published-tiers |
| Primary source | https://co-brain.ai/en/questionnaire-agent | https://www.plerion.com/agents |
| Last checked | 2026-10-19 | 2026-10-18 |
| Official site | https://co-brain.ai/en/questionnaire-agent | https://www.plerion.com/agents |
FAQ (from this dataset)
What is the difference between Co-Brain Questionnaire Agent and Plerion Pleri?
Both are listed under Security. They share no task tags in this dataset. Co-Brain Questionnaire Agent-only tasks: questionnaire-automation, workflow-automation. Plerion Pleri-only tasks: cloud-security, vulnerability-management, remediation, exposure-management. Differences are from stored category and task tags, not a ranking.
Which one publishes pricing?
Co-Brain Questionnaire Agent (security questionnaire automation): Not published Plerion Pleri (AI security engineer): Published estimator on plerion.com/pricing: a fixed monthly Plerion bill set by combined monthly AWS/Azure/GCP spend (example shown: $100,000–$130,000 cloud bill → about $3,100–$3,700/month, USD), all capabilities and the agent included; 'Start free' option.
Where are Co-Brain Questionnaire Agent and Plerion Pleri headquartered?
Co-Brain Questionnaire Agent (security questionnaire automation) publishes HQ in Germany. Plerion Pleri (AI security engineer) publishes HQ in Australia.
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 Plerion Pleri (AI security engineer). 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.
- 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
- TPRM and vendor-risk AI agents — 40 listings (Third-party risk, vendor assessments, security ratings and questionnaire automation)
- Cloud security (CNAPP) AI agents — 9 listings (Cloud and container security posture, exposure and remediation)
- Security questionnaire AI agents — 10 listings (Inbound security questionnaires, SIG/CAIQ-style responses and questionnaire automation)
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