We regularly conduct a Benchmark test for broken links on a subset of the S&P 500 websites. Below are the results from our benchmark testing of some of the top High Tech companies on the list. All of these websites contain broken links, with an average of 2.4% dead links and a total of over 31,000 broken links collectively. Some sites do significantly better, while others are much worse.
Amongst the best websites are Comcast, Dell and Microsoft all with less then 0.5% broken links. The list websites with very low link quality include companies such as Cisco, Apple and Tech Data all with more than 4% of their links broken.