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Get in touch with your favorite YC companies and founders

^*YCRM is not affiliated with Y Combinator

Companies

A list of all YC companies and their contact information.

Name	About	Emails
Helion Energy Summer 2014	Building the world's first fusion power plant	Sign-In An account is required to download data from YCRM. Almost There! YCRM requires a one-time $30 payment to get access. What You Get Unlimited downloads for 30 days 5000+ YC founders' email, LinkedIn, and Twitter Access to the latest YC batches Access to all CRM data enhancements Get Access View Sample Payment Successful Congrats! You now have unlimited access to the YCRM database for 30 days. If you have any questions or run into issues, please don't hesitate to reach out. We are here to help.
GBatteries Winter 2014	Enabling li-ion batteries to charge ultra fast without compromising…	Sign-In An account is required to download data from YCRM. Almost There! YCRM requires a one-time $30 payment to get access. What You Get Unlimited downloads for 30 days 5000+ YC founders' email, LinkedIn, and Twitter Access to the latest YC batches Access to all CRM data enhancements Get Access View Sample Payment Successful Congrats! You now have unlimited access to the YCRM database for 30 days. If you have any questions or run into issues, please don't hesitate to reach out. We are here to help.
CircuitHub Winter 2012	On-Demand Electronics Manufacturing	Sign-In An account is required to download data from YCRM. Almost There! YCRM requires a one-time $30 payment to get access. What You Get Unlimited downloads for 30 days 5000+ YC founders' email, LinkedIn, and Twitter Access to the latest YC batches Access to all CRM data enhancements Get Access View Sample Payment Successful Congrats! You now have unlimited access to the YCRM database for 30 days. If you have any questions or run into issues, please don't hesitate to reach out. We are here to help.
Zephyr Fusion Fall 2025	Powering tomorrow's industrial revolution in space	Sign-In An account is required to download data from YCRM. Almost There! YCRM requires a one-time $30 payment to get access. What You Get Unlimited downloads for 30 days 5000+ YC founders' email, LinkedIn, and Twitter Access to the latest YC batches Access to all CRM data enhancements Get Access View Sample Payment Successful Congrats! You now have unlimited access to the YCRM database for 30 days. If you have any questions or run into issues, please don't hesitate to reach out. We are here to help.
Axial Composites Industries Fall 2025	Carbon Fiber Manufacturing at the Speed of Software	Sign-In An account is required to download data from YCRM. Almost There! YCRM requires a one-time $30 payment to get access. What You Get Unlimited downloads for 30 days 5000+ YC founders' email, LinkedIn, and Twitter Access to the latest YC batches Access to all CRM data enhancements Get Access View Sample Payment Successful Congrats! You now have unlimited access to the YCRM database for 30 days. If you have any questions or run into issues, please don't hesitate to reach out. We are here to help.
SigmanticAI Summer 2025	The Cursor for Chip Design - Delivering Silicon-Ready Chip Designs…	Sign-In An account is required to download data from YCRM. Almost There! YCRM requires a one-time $30 payment to get access. What You Get Unlimited downloads for 30 days 5000+ YC founders' email, LinkedIn, and Twitter Access to the latest YC batches Access to all CRM data enhancements Get Access View Sample Payment Successful Congrats! You now have unlimited access to the YCRM database for 30 days. If you have any questions or run into issues, please don't hesitate to reach out. We are here to help.
Godela Spring 2025	AI Physics Engine to replace simulations and prototypes	Sign-In An account is required to download data from YCRM. Almost There! YCRM requires a one-time $30 payment to get access. What You Get Unlimited downloads for 30 days 5000+ YC founders' email, LinkedIn, and Twitter Access to the latest YC batches Access to all CRM data enhancements Get Access View Sample Payment Successful Congrats! You now have unlimited access to the YCRM database for 30 days. If you have any questions or run into issues, please don't hesitate to reach out. We are here to help.
Cascade Space Spring 2025	Deep space communications as a service	Sign-In An account is required to download data from YCRM. Almost There! YCRM requires a one-time $30 payment to get access. What You Get Unlimited downloads for 30 days 5000+ YC founders' email, LinkedIn, and Twitter Access to the latest YC batches Access to all CRM data enhancements Get Access View Sample Payment Successful Congrats! You now have unlimited access to the YCRM database for 30 days. If you have any questions or run into issues, please don't hesitate to reach out. We are here to help.
Cactus Summer 2025	Kernels & Engine for running AI on consumer devices.	Sign-In An account is required to download data from YCRM. Almost There! YCRM requires a one-time $30 payment to get access. What You Get Unlimited downloads for 30 days 5000+ YC founders' email, LinkedIn, and Twitter Access to the latest YC batches Access to all CRM data enhancements Get Access View Sample Payment Successful Congrats! You now have unlimited access to the YCRM database for 30 days. If you have any questions or run into issues, please don't hesitate to reach out. We are here to help.
Boost Robotics Spring 2025	Robots for the inspection and maintenance of data centers	Sign-In An account is required to download data from YCRM. Almost There! YCRM requires a one-time $30 payment to get access. What You Get Unlimited downloads for 30 days 5000+ YC founders' email, LinkedIn, and Twitter Access to the latest YC batches Access to all CRM data enhancements Get Access View Sample Payment Successful Congrats! You now have unlimited access to the YCRM database for 30 days. If you have any questions or run into issues, please don't hesitate to reach out. We are here to help.

Data updated on 12/8/2025