I built a private Copilot alternative that never lets your data leave your Microsoft 365 tenant

Short summary

Developer shares Privault, a private AI assistant running inside Microsoft 365 tenants with data residency guarantees using Anthropic's Claude. Built for EU SMBs avoiding Copilot's per-seat pricing and data-residency concerns, it provides SharePoint semantic search, Microsoft Graph integration for email/tasks/calendar, and audit-friendly citations. Key: grounding and citations at production scale are harder than clean demos.

• •Private Copilot alternative running entirely within client's Azure tenant—no data leaves Microsoft 365
• •Addresses EU compliance and per-seat pricing pain points; 90+ language support for bilingual users
• •Architecture uses semantic search, Microsoft Graph for actions, and Anthropic Claude with zero-data-retention agreement

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