Fathom Water is a technology company focused on water treatment solutions primarily for semiconductor fabs and advanced manufacturing. It employs an in-house AI platform called FathomOS, which integrates AI agents, digital twins, and coordination tools to manage all phases of water project development, design, and operation. The platform supports project managers and engineers by improving productivity, risk management, and cost control.

The company utilizes quantum purification technology for producing ultrapure water and chemicals, aimed at enhancing semiconductor fabrication yield and lithium product quality. Fathom also incorporates modular design principles for scalable water systems and emphasizes resource recovery through innovative wastewater reclaim and reuse methods.