Online service for checking the site for strength?

Question

stress testing

There was such a foreign service, there is a free check and a paid one.
The bottom line is that it emulates visits to the site of ordinary visitors.
Remind me please.

Answer 1

loadimpact.com/ - for example

Answer 2

Announcement of the site on Habré write and check.

Answer 3

New Relic , a lot of features and of course for a fee (but there is a free Lite plan plus 2 weeks of trial).

Answer 4

Publish on Habré and offer money for identified problems, just clearly indicate what exactly you are willing to pay for.