Project Healthy Minds is a startupy mental health nonprofit focused on building a comprehensive dataset of mental health services and outcomes while prioritizing user privacy. They aim to help people access care across the full treatment spectrum and understand outcomes by collecting anonymized outcome data.

Promise (YC W18) is building modern payment infrastructure for the government. We help people stay on track with rent, utilities, court fines, and more—without falling into cycles of debt or incarceration. It’s complex, high-scale work with real human impact.

Prompt Health is a fast-growing Healthcare SaaS company with over $100M in ARR, growing 100%+ YoY. We build software used by large healthcare organizations to operate more efficiently and deliver better patient care.

Promptfoo is building open-source pentesting tools for LLMs. Backed by a $5.3M seed round led by Andreessen Horowitz.

Promptless builds AI agents that automatically update customer-facing documentation. YC-backed with a seed round from top VCs and angels; customers include startups, CNCF projects, and Fortune 500 companies.

Promptless helps technical writers become uber-productive by embedding AI right into their daily workflows. Every year, U.S. companies spend >$9bn on dedicated technical writers to evolve public-facing documentation, and while AI has made superficial inroads in the space (like embedded chatbots in API docs), Promptless directly improves the quality of public documentation and makes technical writers many times more effective.

We’re helping companies rank and be visible in AI search / ChatGPT, Google AI mode etc. (GEO)

Developing player-focused games on the blockchain.

Millions of messy unstructured real estate data points. Thousands of edge cases. One mission to make it all sing. We're building the infrastructure to turn chaotic real estate data into precise location intelligence - backed by Y Combinator, General Catalyst, MetaProp, and Singularity Capital. At PropRise, we're using AI to analyze millions of real estate data points daily—uncovering hidden deals even smart money miss. We are making unstructured and messy real estate data usable to help institutional real estate teams spot their next multi-million dollar location.

Propel is on a mission to empower low-income Americans by simplifying access to government benefits with modern technology. All of our users deserve first-class experiences in their daily interactions with the social safety net and financial services. We’re a passionate team of 100 Propellers - all working to help our users get through the month, every month.