YC startup Momentic launches autonomous QA agent Mo

Momentic (YC W24) launched Mo, a QA agent that autonomously plans, explores and bug-bashes web, iOS and Android apps. The team argues LLM-generated Playwright scripts are misaligned with agentic development, so Mo uses a self-organizing agent graph. It costs $2.67 per bug found versus $0.80 for Codex, but less than Claude Code and Devin, according to the company.

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