Is a PIR sensor or an optical sensor better for my workspace?

Optical sensors are primarily beneficial for larger companies with hundreds or thousands of employees. In your case, where the majority of your employees work remotely, buying optical sensors may be an unnecessary cost as PIR sensors are much cheaper and get the job done. Just keep in mind that optical sensors offer much more valuable insight, including employee experience, optimization for space design, and a true understanding of your space use. PIR sensors only offer basic workplace data, so your choice will depend on your budget and what you want to get out of the sensors.