What are some alternatives?
When comparing LinkChecker and SiteWiki.co, you can also consider the following products
DRKSpiderJava - DRKSpider is an open source website crawler (sitemap generator) and link checker. Features:
SiteData.co - Website Analysis Tools
Integrity - Feature comparison of link checkers for Mac: Integrity, Integrity Plus and Scrutiny
SiteAuditTools.com - Website Audit & Analysis Tools
Dead Link Checker - Check for broken links on any website
SiteAuditTool.com - Generate Website Audit Reports