Yes, most mesh WIFI systems require a subscription or monthly fee in order to access their services. Typically, the fees are quite reasonable and range from $10-30 per month depending on the service you choose. Depending on your specific needs and budget, you may be able to find a plan that offers unlimited data along with other features such as parental controls and guest networks. Additionally, some companies offer discounts for signing up for an annual contract rather than paying month-to-month. Ultimately, the cost of mesh WIFI will depend on what features you need and how much coverage area your home requires.