Link Building

I’m trying to determine a good form for sourcing link building to. Can I get recommendations please. Here are the few that have come up so far:

IntraPromote
IncreaseVisibility
CustomerMagnetism
VerticalMeasures
eBrandz
Sharpize
PageTraffic
Guide5

Oops - I meant a good FIRM (not form). :slight_smile:

Hmmm … that is my question. Which one is good?