Provider provides the connection to Confidence.
This documentation refers to the overall setup as “Confidence SDK” for
simplicity.
Server SDKs
Confidence offers Server SDKs built on an open source Confidence Resolver—a Rust-based flag resolver that can run natively or as WebAssembly. These SDKs evaluate flag rules to flag values entirely on your infrastructure. The resolver syncs flag rules and logging with the Confidence backend periodically, in the background. This enables:- Ultra-low latency: Flag evaluations happen locally in microseconds
- High reliability: No network dependency at evaluation time
Go
Go SDK
Java
Java SDK
JavaScript/Node.js
Node.js SDK
Next.js
Next.js with App Router
Rust
Rust SDK
Python
Python SDK
Ruby
Ruby SDK
.NET
.NET SDK (server)
PHP
PHP SDK
Client SDKs
Client SDKs are a specialized form of local resolve designed for mobile and web applications. They resolve all flags once according to the evaluation context, and flag values are then read from a local cache. This approach works well when the evaluation context doesn’t change often—for example, a mobile client that sets the context on login or app start and maintains it throughout the session.iOS (Swift)
Swift SDK
Android (Kotlin)
Kotlin SDK
JavaScript (Web)
JavaScript SDK
Flutter
Flutter SDK
Unity
Unity SDK
.NET
.NET SDK (client)
Edge Resolve
The WebAssembly based resolver is also packaged to run on edge computing platforms. This enables flag evaluation as close to your users as possible, minimizing latency for geographically distributed applications.Cloudflare Worker
Edge resolver for Cloudflare Workers
Fastly Compute
Edge resolver for Fastly Compute
Related Resources
Context
Configure evaluation context
Apply Events
Track flag assignments
Flags Introduction
Overview of feature flags