GTmetrix

29th October 2015
Description: GTmetrix gives you insight on how well your site loads and provides actionable recommendations on how to optimize it.
Price: Free (basic); £14.95/month (bronze); £49.95 (silver); £149.95 (gold); customisable (pick and choose which features you want to get the price that's right for you)
Website: https://gtmetrix.com