Rewbi
ActiveA stealth mode startup.
About
A stealth mode startup.
Founders
Thomas Marge· FounderThomas is co-founder and CEO of Rewbi, which uses AI to optimize grid-connected battery storage. He previously founded inBalance, a YC W21 company, which was acquired by Stem (NYSE: STEM) in January of 2023. He led battery storage optimization and forecasting for Stem. He completed part of a Pure Mathematics PhD at University of Cambridge, which he left to build inBalance. He holds a Masters in Applied Mathematics and B.S.E. in Pure and Applied Mathematics from Johns Hopkins, graduating early.
Derek Modzelewski· Co-Founder and CTOEx. Meta and Adept | Combining AI and energy commodity trading experience to make our power grids more stable. Placed first energy commodity trades 10 years ago. Adept’s first technical hire; his AI models were used to raise over $400m in capital. Previously worked with early foundation models at Meta as an ML engineer. Holds a Masters in C.S. and B.S.E. in C.S. Applied Mathematics from Johns Hopkins, graduating early.
Product launches · 1 launch
Rewbi more than doubles grid-connected battery storage revenue.
Change history · 10 recorded
- August 16, 2026
- YC partner updated08:00 PM
- Launches refreshed08:00 PM
- Founder profile updated08:00 PM
- August 15, 2026
- Description rewritten07:00 PM
- Pitch updated07:00 PM
- Tags updated07:00 PM
- July 27, 2026
- Team grew from 2 to 307:00 PM
- July 26, 2026
- Launches refreshed08:00 PM
- YC partner updated08:00 PM
- Founder profile updated08:00 PM