Simon Boisset
Keystone Stack

A solid, AI-ready SaaS stack.

Build fast. Stay stable.

Auth + orgsShared SDKAI-ready

Ship fast

Everything wired to launch an MVP in days.

Quality guardrails

Strict TypeScript, Biome, no bypasses.

Consistent multi-platform

Shared SDK, oRPC, and TanStack Form.

Keystone Stack icon

What you get

End-to-end

Web app

Vite + TanStack Start + Tailwind + shadcn UI.

Mobile

Expo + React Native + shared SDK + EAS workflows.

API layer

Hono + oRPC + Zod + Better Auth.

Database

Drizzle ORM + Postgres + migrations.

TanStack StartExpoHono + oRPCDrizzle ORMPostgres

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Drop your email to get early access when it ships.

What you get, immediately usable

Core apps and shared types wired to ship fast.

Web app

Vite + TanStack Start + Tailwind + shadcn UI.

Mobile

Expo + React Native + shared SDK + EAS workflows.

API layer

Hono + oRPC + Zod + Better Auth.

Database

Drizzle ORM + Postgres + migrations.

Ship fast, regain control

Start with vibe coding, then take the wheel with clean code and clear rules.

MVP in days

Launch a working product quickly with the core flows already wired.

Vibe-code friendly

Move fast early without breaking structure or getting stuck later.

Controlled code + rules

Strict conventions, shared contracts, and rules you can enforce.