Modular Direct Air Capture (DAC) units are systems engineered to remove CO₂ directly from the atmosphere using solid or liquid sorbents in compact, scalable modules. These units are designed for decentralized deployment and integration with renewable power, CO₂ storage, or utilization platforms. Applications include negative emissions technologies, carbon offset solutions, and industrial decarbonization. Key players are advancing modular DAC to improve portability, energy efficiency, and lifecycle economics. Though still emerging, the modular approach is critical to scaling DAC in urban and remote settings, contributing to net-zero targets and climate mitigation strategies.