As someone who has been in the file format space for a very long time, I've always been impressed with Aspose. I was one of the founding members of https://poi.

As someone who has been in the file format space for a very long time, I've always been impressed with Aspose. I was one of the founding members of https://poi.apache.org https://poi.apache.org. Later, I went to work for a competitor of Aspose. At some later point, I used their products for work. I can't speak about their CAD product but I haven't found anyone that comes even close to their support of the MS Office formats. Do you have an alternative suggestion?