Cool Company Raises · YC F26 · papaya.fyi

Papaya launches at YC (Fall 2026)

Papaya tunes AI agents that are already in production. You connect traces with a one-line SDK or hand over raw data, and it runs 200+ research-backed analyses across thousands of runs to find what is recurring — prompt and caching inefficiency, tool schema drift, context bloat and retrieval strategy, model selection and routing, retry loops and wasted API calls. Findings come back ranked by impact, each with the specific runs affected, an estimated effect on quality, latency and cost, and a confidence level, delivered into Slack, a dashboard or a PR. The company cites cost reductions up to 52%, latency improvements up to 61% and quality gains of +11%, and offers a free 24-hour audit. Founded in 2026 by Macy Mody, Niyaz Puzhikkunnath and Faiz Vadakkumpadath, Papaya has 3 employees in San Francisco.