Top Tech Startups to Work For in 2027

Sleeper's mission is to connect people over sports. We believe the most important aspect of sports is its ability to bring friends and communities together. We do this via multi-player games like fantasy leagues, with messaging at the core of the experience. We're hiring and would love to meet you!

We believe people are at their best when they’re living free from the burden of energy costs. The sun is the energy source of all life on earth, yet humanity captures almost none of what if offers. To close that gap, Optivolt builds solar systems that think — designed with aerospace power electronics inside to make solar more powerful, reliable, and cost effective than ever. Optivolt's Breakthrough: We realized deep integration between solar panels and power electronics unlocks an entirely new design space for innovation. This led us to inventing the Power Balancer (19 patents issued, 27 pending), an advanced power electronics device which embeds inside solar panels. Balancers work by shuffling power from stronger to weaker zones in the panel to keep power flowing, maximizing energy output and reliability. Performance vs. $8B market leader: • Up to 6x higher power output in real-world conditions • 40% lower equipment cost, 50% faster to install • 4x less failure points, while eliminating hotspots (#1 solar failure mode) Optivolt's development is funded in part by the U.S. Department of Energy.