Which site has the most complete and up-to-date backlink database? Ahrefs? How accurate and up-to-date is it? Obviously they don't have direct access to Google's databases and they don't have the server farm to crawl the entire web as fast as Google, so there HAS to be a percentage of pages, especially newer ones, they have yet to discover and scrape the links. More specifically, if you have a brand new website, disregarding major Web 2.0 backlinks, how likely and how quickly will backlinks on lesser known sites linking to the brand new site take to show up in Ahrefs? Ahrefs seems a bit pricey for a small SEO. What's the next best think at lower cost?