Website Speed Ranker - Compare how fast your website loads vs your competitors
Smaller - Make your websites load faster
Website Grader - Grade your website's strengths and weaknesses in seconds.
Dareboost: Website Speed Comparison - Check how fast your website is against your competitors
SE Ranking - All-in-One cloud-based SEO software for agencies, marketing teams and webmasters
Checkbot - Checkbot will boost the SEO, speed and security of your site by checking you're following 50+ web best practices. Browser extension with free and paid plans.