What are some alternatives?
When comparing SiteWiki.co and Dead Link Checker, you can also consider the following products
SiteData.co - Website Analysis Tools
LinkChecker - LinkChecker is a free, GPL licensed website validator.
SiteAuditTools.com - Website Audit & Analysis Tools
DRKSpiderJava - DRKSpider is an open source website crawler (sitemap generator) and link checker. Features:
SiteAuditTool.com - Generate Website Audit Reports
A1 Website Analyzer - Analyze websites and save data into XML, CSV etc. Extract data about internal linking and importance calculations, file sizes, download times, HTML validation errors etc. across entire websites.