George, Lewis and Ben are saving a seat for Probook's first designer.

The problem

Probook makes an AI operating system for plumbing, HVAC and electrical businesses.

The people

• George Eliadis · CEO

  • Spent six summers pressure washing houses in upstate New York with his father
  • Wharton graduate
  • Spent a summer inside TR Miller, an Illinois HVAC, plumbing and electrical shop

• Lewis Zhang · CTO

  • Finished Berkeley EECS in two years with a 4.0
  • Got a perfect score on the AMC 12 math competition

• Ben Cervantez · Co-founder

  • Grew up helping his dad with plumbing work in San Francisco

So far

TR Miller, an Illinois HVAC and plumbing shop where the CEO once worked dispatch, was its first customer.

$34M Series A led by a16z, after a $6M seed led by Sequoia, June 2026.

Your seat