Launch HN: Propolis (YC X25) – Browser agents that QA your web app autonomously

Propolis is an autonomous QA platform that deploys swarms of browser agents to simulate user behavior, identify bugs, and generate e2e tests for web applications. The agents collaboratively explore websites, flag friction points, and propose tests that integrate into CI/CD pipelines. Available at $1000/month with flexible pricing options, it addresses the gap between deterministic testing and real-world usage coverage by treating agents as a canary group for quality assurance.

Key Points

• •Deploy 10s-100s of collaborative browser agents that autonomously explore web applications and report bugs without impacting real users
• •Agents generate e2e tests that can be integrated into CI/CD pipelines, reducing manual test maintenance while improving coverage breadth
• •LLM-powered checks enable detection of non-deterministic bugs (e.g., product recommendations that don't match search results) beyond traditional deterministic testing
• •Addresses the coverage gap in traditional testing by simulating realistic user journeys rather than relying on mocked/stubbed dependencies
• •Two-minute setup process with free trial available; production-ready at $1000/month with flexible pricing for smaller projects
• •Agents identify user friction points and pain points during exploration, providing qualitative feedback alongside quantitative test generation
• •Tests generated by agents run more cheaply on any trigger (not just during exploration), enabling cost-effective continuous validation
• •Suitable for organizations from startups to public companies seeking to increase automated testing breadth without proportional maintenance overhead

Workflow Diagram

Concepts