Recomiendo backlinkwatch.com para descubrir los backlinks de tus competidores. El resultado incluye el url, texto ancla, PR, total de links externos (OBL) y flag (no follow/do follow).
Para dominios bien posicionados recomiendo domaintrakker.com, la herramienta nos da información clave, adjunto un ejemplo del resumen para Forosdelweb.com
Cita: Forosdelweb.com is the 1,137th most visited site on the internet. The top incoming anchor texts for forosdelweb.com are Foros del Web, forosdelweb, and Forosdelweb.com. There are 32 homepages that link to a page on forosdelweb.com, 2 of which are two-way reciprocal links between domains. The homepage of forosdelweb.com links out to 8 other websites. There is 1 other website sharing the same adsense account as forosdelweb.com. The website's IP address is 72.52.208.142. Forosdelweb.com attempts to set 4 cookies named fdwsessionhash, fdwlastvisit, fdwlastactivity, and vbseo_loggedin. Forosdelweb.com gets about 962,492 pageviews per day, and earns an estimated $2,887.48 daily. The server location of forosdelweb.com is Lansing, MI, United States (US ).