Anti-drone defense startup raises $300 million

• Cambridge, which already has several U.K. government contracts, is developing low-cost interceptor systems for both drones and cruise missiles.
• It's also building a rocket-powered interceptor system for ballistic missiles and a radar system.

Other investors in the round included Lux Capital, Accel, Lakestar, Never Lift, Ora Global, and Elad Gil.

The bottom line: The high cost of legacy interceptors is justified by their effectiveness — something the burgeoning batch of air defense startups still needs to prove.