RelativeCI

Automated bundle analysis platform that tracks frontend bundle size and performance metrics across builds. Captures asset, module, and package-level data and surfaces regressions before deployment. Integrates with CI pipelines to provide feedback where teams already work: commit status, check reports, pull request comments, and Slack.

RelativeCI differentiates from standalone bundle analyzers with automated code review driven by project-specific rules, side-by-side comparison between builds, and dependency cost analysis that flags new or duplicate packages. Supports npm, pnpm, and yarn. Integrates with InfluxDB for metrics forwarding when teams need custom dashboards.

Key capabilities:

• Detailed bundle analysis for assets, modules, and packages with size, initial JS, initial CSS, and cache invalidation metrics
• Automated review flow with dynamic rules tailored to the project
• Side-by-side comparison of bundle changes between builds
• Dependency analysis for direct and transitive packages, including duplicate detection
• Support for Webpack, Vite, Rollup, and Rspack
• GitHub Actions, CircleCI, Vercel, Jenkins, and other CI services via env-ci support
• Integrations: GitHub status and check reports, PR comments, Slack, InfluxDB

Teams use RelativeCI to enforce bundle size budgets, catch regressions introduced by new dependencies or code changes, and optimize frontend performance before shipping. Setup options include a GitHub Action for open source, CLI for advanced control, and a webpack plugin for small to medium private projects.