Nibbler is a free tool by U.K.-based Silktide that rates uses a ranking system to determine your website's effectiveness and accessibility in 10 key areas, including design, SEO, social media, and technology. So far, Nibbler has graded more than 4,099,673 web sites on a scale of 1 to 10.
Among its idiosyncracies, Nibbler penalizes sites heavily for failing to meet the W3C Web Content Accessibility Guidelines, which are geared to make Web content more accessible to people with disabilities.
We wondered which top PR agency maintained the best site -- so we took the eight top ranked firms (by global revenue) and ran them through Nibbler. Click the scores to see a detailed explanation of each agency's results.
Here's how they rank as of May 1, 2017:
This is an update to a post originally published in 2005.