Confidence SDKs

Confidence provides SDKs for several products. Use this table to find the SDK or tool for what you want to do.

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Feature Flag SDKs

The Confidence flag SDKs support the OpenFeature standard, a project from the Cloud Native Computing Foundation (CNCF) that standardizes feature flagging. Your application calls the OpenFeature API, and a Confidence Provider connects it to Confidence. This documentation calls the overall setup the “Confidence SDK”.

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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

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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.

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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.

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Related Resources