Below is a list of links to DNA testing companies (in no particular order). We originally used ScotlandsDNA, but they are no-longer in this market. More recently we used Family Tree DNA - but there are others - and many opinions as to which is best! The choice is yours ...
Once you have decided - and tested - if you upload to a comparison site, you can check matches with others who have used a different testing company. We did this at GEDmatch and our Male YDNA tester reference is T447036 Genesis ref ME9171397, our Female Autosomnal tester reference is T957149 Genesis ref CX9279939.
Genes on the Web