Substrate Labs is a company founded by Ben and Rob, who have backgrounds at Venmo, Stripe, Fin, and Substack. They started their first product, Substrate, in 2023, a platform for building agentic workflows, and raised an $8M seed round led by Lightspeed. They are now gearing up to launch their latest vision, a consumer AI application.

Subtle Medical is a global leader in AI-powered medical imaging, using deep learning to enable faster, safer, and smarter scans. Our technology helps healthcare providers deliver high-quality imaging more efficiently—reducing scan times, improving image quality, and expanding access to care without the need for new hardware. We are on a mission to transform the imaging experience for both providers and patients. By building responsible AI solutions that integrate seamlessly into existing workflows, we help radiology teams operate more efficiently while improving the patient experience—especially for those who struggle with long or difficult exams. Our vision is a world where every patient has access to timely diagnosis, high-quality care, and better health outcomes. Subtle Medical offers a robust, multi-modality portfolio across MRI, PET, and CT, and continues to invest heavily in research and development. Our team includes leading radiologists, scientists, and engineers from top institutions such as Stanford, Harvard, and MIT, as well as industry veterans from GE, Philips, and Siemens. Recognized by TIME as one of the World’s Top HealthTech Companies (2025) and named to CB Insights’ GenAI 50, Digital Health 150, and AI 100, Subtle Medical is helping shape the future of medical imaging. Today, our solutions are deployed on over 1,000 scanners worldwide, supporting hospitals and imaging centers in delivering faster scans, improved diagnostic quality, and better patient care. We are hiring: Senior Platform Engineer:

We believe the future of writing is AI & human collaboration. Sudowrite is the best AI for creative writers. We are profitable with a rapidly growing paying user base. We've been featured in The New York Times, New Yorker, Verge, etc. We believe new tools will enable a renaissance in art & creativity and we want to help the next generation of storytellers tell better stories.

Sumble is applying language models to build high-quality datasets, focusing on company-related data integrated with customer's Salesforce data to enhance go-to-market operations. Long-term, they aim to be the primary source for high-quality external data.

Join a small, ambitious startup with huge growth potential, redefining home cannabis cultivation with automated grow boxes.

Sundogs is a startup in the advertising space; we make video ads perform better by giving marketers tools to measure and improve their creative effectiveness. Our team is a global collection of Cannes-winning creatives, ex-Googlers, cutting edge data scientists, and start-up entrepreneurs, and we're poking at the future with curiosity and delight.

Sunnyside focuses on moderation and mindfulness in the alcohol health space, helping customers improve their overall health and wellness without giving up alcohol entirely.

We are building a future where anyone can make music by using a simple prompt or lyrics.

Supabase is an open-source Firebase alternative with over 60,000 stars on GitHub. It is a Backend platform offering a Postgres database, vector extensions, auth, real-time functionality, storage, restful APIs, and edge functions.

SuperEgo Health is a healthcare product studio building consumer-facing products across healthcare, AI, and wellness.