KoumaVisual Regression Testing

Pixel-based screenshot comparison solution for catching visual bugs before they reach production.

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Pixel-Based Comparison

Precise visual regression detection comparing screenshots pixel-by-pixel with configurable color thresholds and antialiasing support. Catch even the smallest unintended visual changes.

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Web Dashboard

Inspect test results, review visual mismatches, and maintain baseline builds through an intuitive interface. Quickly approve intentional changes or flag regressions.

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Go Engine

High-performance comparison engine written in Go with concurrent goroutine processing for fast results. Designed for speed and accuracy in visual diff generation.

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CLI & Client Library

Zero-dependency TypeScript client with CLI, programmatic API, built-in Cypress plugin, and Playwright reporter. Seamless integration with your favorite testing tools.

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Docker Ready

Quick local setup with Docker Compose and production-ready Kubernetes deployment via Helm charts.

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Flexible Authentication

Secure your dashboard with multiple authentication methods including passcode, Microsoft OAuth, and Google OAuth with optional domain restriction.

Screenshots

Kouma Home Kouma Project Kouma Build Kouma Case Compare Slider Kouma Case Diff Overlay Kouma Case Exclusions Kouma Webhooks Kouma Analytics Kouma Logs