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.