Which company vps is best?

Which company vps is best? my range is $20

I suggest you to check this site first and make a survey between the good vps for your need;

http://www.webhostingtalk.com/

http://www.blackhatworld.com/forums/hosting.196/

for your budget range i doubt you'll get good (as recommended) vps.

but you can tried to check the sites above.

Mine using serverhosh and it's good as well

Try VPB, https://www.vpb.com/promotion.php

Affordable and stable 

Your not going to find much of any real use for $20 Khiz. Its been my experience that SER needs a VPS with around 4-6 gigs to really function properly; not to mention a decent processor.

I'm using https://www.serverhosh.com/
It's best of me.