Adobe Fonts can be used both for personal and commercial purposes. The Open Sans open source license allows anyone to contribute to its development. All of the fonts are free to use, allowing you to create beautiful types that are accessible to everyone. Google typefaces is a collection of open-source typefaces created by Google in collaboration with type designers, foundries, and design communities all over the world. Additionally, the letterforms in Source Sans are more condensed, and the typeface has a slightly higher contrast. Source Sans is slightly narrower than Open Sans, and has a higher x-height. However, there are some subtle differences between the two typefaces. Both Source Sans and Open Sans are sans- serif typefaces designed with an emphasis on legibility and readability. It is an open-source typeface, and was designed with an emphasis on legibility and readability. Open Sans is a sans-serif typeface designed by Steve Matteson and released by Google in 2011. It is the first open-source typeface from Adobe, and was designed with an emphasis on legibility and readability. Source Sans is a sans-serif typeface designed by Paul Hunt and released by Adobe in 2011.