Notavia is notification infrastructure built around ASP.NET Core and Blazor. One API call sends email, an in-app inbox message, SMS, or chat (Teams, Discord) — with templates, retries, idempotency, suppression, unsubscribes, and a replayable delivery log handled for you. There's a drop-in Blazor inbox component with real-time updates, SDKs for .NET, TypeScript, Python, Go, and PHP, and an MCP server so AI editors can drive it. White-label, free forever at 1,000 sends a month.