Abby

Abby is a feature management and A/B testing platform built around a simple, statically typed API, so flags and experiments are declared in the same language as the application that reads them. Alongside the SDKs it ships a dashboard, which keeps the people who do not write code out of the codebase.

The repository is a Turborepo monorepo managed with pnpm and written entirely in TypeScript. A Next.js app on the T3 stack serves the dashboard, a second Next.js app with Nextra serves the documentation, and one core SDK sits underneath every framework client.

What ships is deliberately small.

• Typed SDKs: a core JavaScript package backs the React, Next.js, Angular and Svelte clients.
• Dashboard: teammates who do not write code manage flags and experiments without opening a pull request.
• Privacy: no personalized user data is tracked and no marketing cookies are set.
• Self-hosting: the platform runs from this repository, with a hosted version for anyone who would rather not operate it.
• Tooling: TypeScript, ESLint and Prettier are wired across every package in the workspace.

Getting a local instance up is a clone, a pnpm install, a package build, a database start, an environment file copy, a migration and the dev server. Sign-up runs through email, and the bundled MailHog inbox catches the one-time link so an account can be created without any mail provider configured.