Test feature variations in your real product

Generate and compare different versions of product flows and interfaces directly in your application.

Create multiple versions of the same feature

Start from an existing flow and generate alternative versions using your real components and structure, without rebuilding from scratch.

Compare variations based on real behavior

Evaluate how each version performs in context, using real interactions and usage patterns to decide what to keep.

Use cases

Fei Studio empowers the whole team

Including Product Managers, Designers & Engineers

Validate Product Ideas

Turn early ideas into production-ready changes, release them behind feature flags, and learn from real user behavior before committing fully.

Prototype With Real Code

Designers prototype new experiences directly in the product environment instead of relying only on static mockups.

Accelerate Feature Delivery

Move from product requests, screenshots, or tickets to production-aligned pull requests faster by reducing handoffs.

Improve Existing Features

Refine existing product experiences and workflows without rebuilding them from scratch.

Refactor Legacy Interfaces

Modernize legacy UI surfaces and migrate them toward current component standards while preserving the structure of the real codebase.

Rapid Product Iteration

Explore multiple variations of product flows quickly inside the real product environment to accelerate discovery and refinement.

Stakeholder Demos

Create realistic demos using the real product environment instead of static mockups for leadership or customer conversations.

Design System Alignment

Generate product updates that reuse existing components and patterns to maintain consistency across the application.

Turn Support Feedback Into Product Changes

Translate customer feedback, bug reports, and support tickets into concrete product improvements aligned with the codebase.

Explore UX Improvements

Experiment with navigation, layout, and interaction improvements directly in the real product environment.

Build Enterprise Customizations

Create tailored product experiences required for enterprise customers while keeping changes aligned with the existing architecture.

Test Feature Variations

Generate alternative versions of product flows and interfaces to explore new directions before committing to implementation.

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