Y Combinator Summer 2021 (S21) Companies
389 companies from the Y Combinator Summer 2021 batch, with their investors and founders.
Zazos is a platform for enterprise operations that unifies business data and uses AI to extend or create missing capabilities, replacing legacy systems. It offers pre-built applications for expenses, time off, and evaluations alongside custom app creation through natural language, with built-in governance and audit trails.
2 investors
Zeit Medical develops a wearable headband with AI-powered sensors that detects strokes in real time and automatically alerts emergency services, targeting patients at high risk for stroke who may be asleep or unable to call for help themselves.
3 investors
8 investors
Zensors builds multimodal "physical AI" that fuses data from sensors, cameras, and devices with text and warehouse metadata to understand physical spaces and activities, then uses AI agents to automate operational decisions. It targets enterprise operations, IT, and business teams looking to replace point solutions like LIDAR and beacons with a single AI system.
3 investors
Zuma develops AI-powered automation software for property management companies, automating leasing operations tasks like scheduling tours and lead management. The platform serves property management teams and leasing agents in the US real estate industry.
5 investors




