Zencoder announced the public beta of Zentester, an AI-powered agent that transforms end-to-end (E2E) testing from a bottleneck into an accelerator. This breakthrough enables development teams to move from “vibe coding” to production-ready software by accelerating quality assurance and providing instant verification within developer workflows. While AI coding assistants have revolutionized code generation, the gap between writing code and shipping reliable software remains vast. Teams need faster feedback loops, and E2E testing – the final verification that software actually works – continues to be a manual, brittle process that can add days or weeks to release cycles. Zentester sees and interacts with applications as users do—clicking buttons, filling forms, navigating flows, and validating both UI state and backend responses. The agent can take scenarios in plain English without wrestling with scripting frameworks. This brings comprehensive E2E testing directly to the engineer’s fingertips—both in their IDE through Zencoder’s existing integrations and in CI/CD pipelines via Zen Agents for CI. It enables five mutually supportive use cases: Developer-Led Quality, QA Acceleration, Quality Improvement for AI Coding Agents, Healing Tests, and Autonomous Verification.