Fána is an open-source feature flagging platform specializing in audience-targeting. Using Fána's robust audience targeting capabilities, developers can build confidence in their feature releases by progressively deploying to larger subsets of users and controlling feature toggles in real-time.

📃 To read more about why and how we built Fána, check out our technical case study.

• 🐳 Deploy locally in one step using Docker, or
• ☁️ Use Fána's AWS Cloud Development Kit

Fána offers a simple, straightforward frontend interface to manage flags and their audiences, making for an intuitive user experience with a minimal learning curve. Fána allows developers to selectively serve experiences to particular audiences, while allowing for remote toggling in real-time.

Fána has three closely related entities at its core: Attributes, Audiences, and Flags. Together, they enable Fána users to target intentional segments of users within their application. To starting using Fána, users should first create these entities in the Fána dashboard.

• Attributes are qualities that serve to describe a user. The values can be of data types strings, numbers, or booleans, and are used to evaluate a user’s eligibility against the conditions within an audience.
• Audiences are reusable collections of logical conditions.
  • Conditions are made up of attributes, operators, and a target value.
  • Users can create robust audiences by evaluating conditions with the ANY or ALL combinations.
• Flags are the core entity of Fána. Each flag is meant to represent a specific feature that the Fána user wishes to test.
  • Flags are toggled off by default when created
  • Users can specify audiences within a flag to target specific users

At a high level, Fána's main components are:

1. Manager Platform:

• Backend API & PostgreSQL database
• React dashboard UI for developers to manage feature flags and create audiences

2. Fána Software Development Kits (SDKs) to embed in either client-side or server-side applications that want to use Fána's feature flagging service

• React
• NodeJS

3. Flag Bearer reverse proxy designed to stream and serve flag data to SDKs

https://fana-io.github.io/fana-docs/