Yes, you can make lemonade without using sugar. There are several natural sweeteners that you can use instead, such as honey, maple syrup, stevia, or agave nectar. Keep in mind that using these sweeteners may alter the taste of your lemonade, so you may need to adjust the amount of sweetener you use to get the desired taste. Additionally, some people prefer to make unsweetened lemonade and enjoy the tartness of the lemon juice on its own.