There are other automated link building tools for SEO, but they are not the same as GSA Search Engine Ranker.
RankerX focuses on high domain authority sites and already has all the sites included in the software. Diffrent types of backlinks such as web 2.0s, profiles, bookmarks, 301 shorteners and more can be created using this software.
It’s a great way to diversify your backlink profile with high authority links. Simply select the sites you want to post to and setup your campaign with articles, URLs, anchor texts and tags.
It first creates the accounts and then posts to them. Some sites such as web 2.0s you can post to multiple times to create new posts and create your own private network of blogs. You can easily export your links and account information such as logins and password to your computer in the form of a spreadsheet.
Xrumer focuses mostly on forum links, where as GSA Search Engine Ranker can post to forum sites among many more different platforms. The creators of Xrumer also developed XEvil, a powerful OCR captcha solver tool that can solve harder captchas that GSA Captcha Breaker cannot solve.
I recommend having GSA Captcha Breaker set as your primary captcha solver in GSA SER and Xevil as your secondary. They also have a module add-on that solves Google Recaptcha V2 captchas using rotating proxies (Stormproxies.com)