How Sigilo Profissional Built Zero-IP Logging and AI Privacy Into Its Whistleblowing Platform

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Sigilo Profissional, a Brazilian B2B SaaS platform for workplace climate surveys and whistleblowing channels, has detailed the privacy-first architecture underpinning its ISO 37002 and GDPR/LGPD-compliant system. The platform enforces tenant data isolation at two independent layers — application-level SQLAlchemy filters and PostgreSQL Row Level Security — to prevent cross-tenant data leakage even if application code contains bugs. Whistleblower anonymity is maintained through NGINX-level IP stripping and cryptographic protocol tokens, ensuring no IP addresses or session data are ever stored. To safely use large language models for report structuring and sentiment analysis, the company routes all AI requests through a LiteLLM proxy that strips personally identifiable information before prompts reach external models. Administrative actions are recorded in immutable, cryptographically hashed audit logs to meet compliance requirements without compromising user anonymity.

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