Under construction. We published before finishing, on purpose: better that you watch it grow than that it doesn't exist.
NSail

The Stack

A .NET framework for building business systems without starting from scratch every time. Open under the MIT licence.

What's in it

What every business system needs and nobody wants to write again: messaging, data, security, multi-tenancy, and Blazor and React clients. On top go the kits for each trade, and on top of the kits, the apps.

Data

PostgreSQL, multi-tenant, backups and restores that are actually tested.

Security

Sign-in with Google, Apple and Meta, and role-based permissions.

Messaging

Commands, events and background jobs with telemetry built in.

Clients

Blazor for the system, React for whatever faces the public.

Public, no fanfare

The repository has been open since October 2026. We're hardening it before presenting it: docs, tests and examples. If you want to look first, the code waits for nobody.

Want to contribute, or use it for your own thing? Write to us. →

What it's made of

The Stack and everything around it, from code to server.

.NET
Blazor
React
PostgreSQL
Docker
Caddy
OpenTelemetry
GitHub
Cloudflare
Claude