What is the difference between JMeter and BlazeMeter?

BlazeMeter is 'JMeter in the cloud'. This means it's not only 100% compatible with JMeter - but it also addresses its limitations like scalability, stability and reporting. With BlazeMeter, all you need is to directly upload your JMeter scripts, choose the number of load engines you wish to run on and run the test. BlazeMeter takes care of everything else! You'll have an unlimited number of pre-configured load engines available at your convenience. Detailed graphical reports are also generated during the load.