# Early > Early is Regression Guard: Regression Intelligence for engineering and QA teams shipping fast with AI. Early analyzes a release candidate or group of PRs against production behavior to find changed behaviors and downstream regressions before release. It helps teams stop guessing what the next release breaks, protect what already works, and make better-informed release decisions. > > Early complements tests, code review, and QA. It does not replace them, guarantee complete coverage, block releases automatically, or claim automatic discovery of every business flow across an organization. ## Product (current) - [Regression Guard for Software Releases](https://www.startearly.ai/): Early compares release candidates with production behavior and shows which business flows the release puts at risk before release. - [Regression Guard for Release Candidates](https://www.startearly.ai/regression-guard/): Early Regression Guard compares a release candidate with production behavior to trace release impact and identify regressions. - [How Regression Guard Works](https://www.startearly.ai/regression-guard/how-it-works/): See how Early compares a release candidate with production behavior, maps affected flows and identifies regressions before deployment. - [Early Access and Team Plans](https://www.startearly.ai/pricing-early/): Choose Early access to test Regression Guard on a known regression, or contact Early about a team pilot, security review, and procurement. ## Use cases - [Software Release Risk Use Cases](https://www.startearly.ai/use-cases/): Explore release risks across components, AI-driven development, infrastructure and security-sensitive workflows. - [Downstream Regression Use Case](https://www.startearly.ai/use-cases/downstream-regression/): A code change in one service can create a regression in another component, customer flow or team. - [Infrastructure Change Regression Use Case](https://www.startearly.ai/use-cases/infrastructure-regressions/): Versioned configuration and routing changes can alter customer-facing behavior while application code stays untouched. - [AI and Release Cadence Use Case](https://www.startearly.ai/use-cases/release-cadence/): AI accelerates code creation and pull requests, but verification can leave production release cadence unchanged. - [Security-Sensitive Regression Use Case](https://www.startearly.ai/use-cases/security-compliance/): A code or package change can alter authorization, validation or data handling across a customer workflow. ## Regression Case Files - [The Rspack Build Completed. The Import Failed.](https://www.startearly.ai/regression-case-files/rspack-commonjs-default-export-regression/): A historical Rspack replay traced a production-only CommonJS export regression introduced between v2.1.0-rc.0 and v2.1.0. - [A Pydantic AI Regression Inside a 47-File Fix](https://www.startearly.ai/regression-case-files/pydantic-ai-release-replay/): A Pydantic AI release replay traced incomplete streaming responses to one drain loop removed during a 47-file cancellation cleanup. - [A Hono Form Parsing Regression Inside a Small Fix](https://www.startearly.ai/regression-case-files/hono-parsebody-release-replay/): A historical Hono replay found a form parsing regression in v4.12.28 after a small Content Type handling change. ## Regression and release-risk insights - [Vibe Coding Guardrails for Production Teams in 2026](https://www.startearly.ai/post/vibe-coding-prompt-to-production---part-2/): Vibe coding guardrails for 2026 connect change scope, access limits, code review where applicable, business regression review, and accountable release approval. - [Vibe Coding Grew Up. Production Got Harder.](https://www.startearly.ai/post/vibe-coding-prompt-to-production---part-1/): Vibe coding moved from prompting for snippets to directing coding agents. See what Claude Code and Codex changed, and what production still demands. - [You Did Not Touch It. It Broke Anyway.](https://www.startearly.ai/post/you-didnt-touch-it-it-broke-anyway/): Why regressions are becoming the hardest problem in software delivery, and the question no stage of your pipeline was built to answer. - [Verifying AI-Generated Code Is a Different Job Than Reviewing It](https://www.startearly.ai/post/verifying-ai-generated-code/): Verifying AI-generated code is a different job than reviewing it: understand whether clean-looking changes altered behavior outside the diff. - [5 Ways to Check Agent-Generated Code for Regressions](https://www.startearly.ai/post/reduce-regression-risk-with-ai-test-code-generation/): Use five practical checks to find regression risk in agent-generated code before production, from intended behavior through release-level evidence. - [Which Change Caused the Incident?](https://www.startearly.ai/post/which-change-caused-the-incident/): When production breaks, teams ask which change caused it. The better question is whether the regression could have been caught before release. - [Reviewing the Diff Was Never the Hard Part](https://www.startearly.ai/post/reviewing-the-diff-was-never-the-hard-part/): AI lets teams turn English into code and ship far more pull requests. It did not make them better at knowing what each change did to the rest of the system. ## Company - [About Early: Mission, Team and Investors](https://www.startearly.ai/about-early/): Early helps teams find downstream regressions before release and protect the business flows that already work. Meet the team. - [Regression Guard Frequently Asked Questions](https://www.startearly.ai/faqs/): Answers to common questions about Early Regression Guard, release candidate comparison, production behavior, Expected changes and Regressions. - [Contact Early for Team and Business Questions](https://www.startearly.ai/contact-us/): Contact Early about Regression Guard pilots, team plans, security reviews, partnerships, or general questions using the web form. ## Optional - [12 Best AI Test Automation Tools for 2026](https://www.startearly.ai/post/top-12-ai-test-automation-tools/): Compare 12 AI test automation tools for agentic testing, test creation, visual validation, and release verification. Find the right fit for your team. - [Best VS Code Extensions for Developers in 2026](https://www.startearly.ai/post/25-best-vscode-extensions-for-developers/): Compare the best VS Code extensions for AI coding, code quality, testing, Git, and remote development, with a practical 2026 setup guide. - [Best AI Code Review Tools in 2026](https://www.startearly.ai/post/top-11-ai-code-review-tools/): Compare 11 of the best AI code review tools in 2026 on context, signal, and workflow, and see where code review ends and regression analysis begins. - [7 AI Code Review Best Practices for 2026](https://www.startearly.ai/post/ai-code-review-how-to-make-it-work-for-you/): Apply seven AI code review best practices for 2026, including clear scope, maintained context, bounded tools, evidence, evaluation, and human approval. - [9 Best AI Coding Tools for Developers in 2026](https://www.startearly.ai/post/top-13-ai-code-generation-tools/): Compare nine leading AI coding tools for developers in 2026 by workflow, autonomy, model choice, and the teams they fit best.