I use namecheap for all of my domains (all transferred off of GoDaddy). Not sure about getting .io TLD from them, but otherwise their service is really good and

I use namecheap for all of my domains (all transferred off of GoDaddy). Not sure about getting .io TLD from them, but otherwise their service is really good and prices are very competitive. It also doesn't have the stupid amount of dark patterns that GoDaddy has.