Zalman has done product development since its founding in January 1999 and now holds several patents primarily on both cooling and fan noise reduction.

Zalman's product range includes heat sink and fan solutions for CPUs, as well as quiet power supplies, computer water cooling systems, motherboard chipset coolers, graphics card heatsink and fan combos, laptop coolers, cases, and hard disk cases that lower temperature and reduce noise.

Zalman's primary competitors include Antec, Thermaltake, Spire, Cooler Master, and Arctic.

Zalman has also sold stereoscopic (three-dimensional) LCD monitors, which utilize +45°/+45° polarized 3D glasses.

These products allow the user to play games and other 3D media in full 3D stereoscopy (but with a 50% drop in vertical resolution per frame since only every second line is visible to each eye).