Font Pair is described as 'simple directory to help designers to find Google Fonts that look great together. Google's directory of fonts is massive and it's often tough to find fonts that pair well. This directory helps by providing a human-curated collection' and is an website in the Photos & Graphics category. There are six alternatives to Font Pair, not only websites but also apps for. The best alternative is Font Pairer, which is free. Other great sites and apps similar to Font Pair are Pair & Compare (Free), Font Pairings.ByPeople (Free), Font Combinations (Free) and FontJoy (Free, Open Source).
Font Pairer has a collection of font combinations available in the repository that can be filtered by categories. The fonts combinations are shown visually and are readily available to be downloaded at the click of a button.
FontPairings is a free tool that you can use to find, preview and download carefully-curated font combinations. Visualize them live on several categories of website templates to make sure they fit your project, and download them.
Font Combinations from Canva helps you find great fonts that work well together. Through a simple but elegant interface, you can not only test font pairs with your own text, you can see real world examples.