Feature flags

Move fast. Without breaking things.

At Spotify, 300+ teams ship independently, without coordinating deployments or waking up to incidents. Feature flags are how we do it. Now you can too, for free.

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Shipping fast shouldn't mean shipping scared

Most teams face a choice: move fast and accept the risk, or move slowly and stay safe. Feature flags remove the tradeoff. Ship code continuously and release features on your terms.

Decouple shipping from releasing

Code goes to production continuously. Features go live when you decide, to whoever you choose, at whatever pace feels right. If something goes wrong, revert in one click, with no deploy and no incident bridge.

One flag, a whole team

Engineers define the schema once. Product managers create variants and adjust behavior without code or a ticket.

From internal test to full rollout, without switching tools

Spotify's teams take every feature through the same proven path. One flag carries the feature from first commit to full release, and reach only grows while health checks and guardrail metrics pass.

Override yourself

See the new experience in production before anyone else does.

Employee test

Validate with real traffic conditions and an internal audience.

Gradual rollout

Ramp from 1% to 100% at your pace, with instant rollback at every stage.

Fully shipped

Keep the flag as a safety net until you're certain it is no longer needed.

Rollout dashboard showing passed health checks, guardrail metrics, and reach progress at 50%.

Flags that do more than switch on and off

A flag in Confidence is a typed schema: strings, numbers, booleans, and nested structs. One flag can govern layout, copy, model versions, timeout values, and feature visibility together.

Target with reusable segments, or load a segment from a SQL query against your warehouse, so your churned-users table becomes a targeting rule.

Fast everywhere, consistent everywhere

Flag resolution has to be instant or it becomes a problem itself. Confidence is built for high performance at every layer.

Mobile

Flags resolve and cache at session start. Every subsequent lookup has zero network latency.

Edge

Resolvers in more than 100 locations keep server-rendered workloads under 10ms.

Sidecar

Run the resolver beside your service and reduce evaluation to an intra-pod call.

Centrally managed

Multi-region, zero-ops resolution with automatic failover for teams that want it handled.

The same user ID gets the same variant on iOS, Android, web, and backend, deterministically, every time.

Which languages and platforms are supported?

Confidence SDKs are OpenFeature providers, so application code stays vendor-neutral. Server SDKs are built on the open-source Rust Confidence Resolver and evaluate flags locally in microseconds.

Server:

Client:

Edge:

Manage flags without leaving your editor

The Confidence Flag MCP Server connects Claude Code, Cursor, and VS Code directly to your live flag environment. A companion Documentation MCP Server gives your AI assistant semantic search across Confidence docs.

Set up MCP

Check status without breaking flow

Ask for a flag's schema, variants, rollout percentage, and targeting rules without leaving the file you are working in.

Create and configure as you code

Set up a flag and its variants in the same conversation as the code that uses it.

Override for testing instantly

Create a personal targeting rule for QA without switching to a separate interface.

Keep your codebase clean

Find flags that are fully rolled out or no longer used and turn flag hygiene into routine work.

Confidence works in the CLI, Slack, the web UI, and IDEs: a flag created from the terminal and enabled for beta users from Slack.

Autonomy with guardrails

Give teams the freedom to move fast, with the controls that keep releases safe at scale.

Review workflows

Require peer review before a flag rule goes live, with the same rigor as a code review.

Role-based access

Give teams ownership of their flags while protecting sensitive surfaces.

Audit logs

Keep a complete record of every change: who made it, when, and from which state.

OpenFeature standard

Keep application code vendor-neutral with the CNCF feature flag standard.

Feature flagging built at Spotify scale

300+: Spotify teams shipping independently
0: Deploy coordination required
< 10ms: Edge flag resolution
100+: Edge locations worldwide

Experiment like Spotify: Feature Flags

Feature flags in Confidence let you ship behind a flag, validate changes in A/B tests, and roll out winners safely. See how Spotify uses flags every day.

January 25, 2024Johan Rydberg

The Feature Flag Toolbox: Cloud, Edge, and Local

Feature flagging with Confidence: compare cloud, local, and edge flag resolution, the latency and resilience tradeoffs, and how to pick the right setup.

December 5, 2025Fabrizio Demaria

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