SpeedTrace Pro is -the- best profiling tool I've used. The performance metrics are great and the 'data capture' when doing a strack trace capture is invaluable. I work with a large 3rd party web application which I don't have good (or any documentation). When I hit a brick wall ... SpeedTrace gets me to bust though it. –Jon Shoberg

Great tool to deep dive inside complicated .NET applications and tease out performance and bug issues... The company is great to work with... Wonderful tool –Brian Douglass

We've tried a lot of different profiler like Ants, dotTrace, AqTime. And after this we've choosen Speedtrace. The gui is sharp and clear. With the Speedtrace Agent we're able to profile our online-application directly on the production servers. –Tom

SpeedTrace is definitely the best tool out there to profile one or more processes with minimum overhead... –Alois Kraus

We have been using SpeedTrace occasionally for the past six months or so. The product is solid and the interface is very intuitive. The team of folks behind SpeedTrace are very professional and stick behind their customers. I have always received a reply within half a day whenever I had queries for them. –Pradman