Co-Brain Questionnaire Agent (security questionnaire automation) vs Plerion Pleri (AI security engineer)
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.
| 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. |
| Framework tags (Agent Index) | — | — |
| 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 |
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 Plerion Pleri (AI security engineer). Open a pair page or the use-case table — this is not a ranking.
- 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.
- 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.
Use-case comparisons
- TPRM and vendor-risk AI agents — 23 listings (Third-party risk, vendor assessments, security ratings and questionnaire automation)
- Cloud security (CNAPP) AI agents — 7 listings (Cloud and container security posture, exposure and remediation)
- Security questionnaire AI agents — 7 listings (Inbound security questionnaires, SIG/CAIQ-style responses and questionnaire automation)
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