Qlik were well ahead of the game with their clever in-memory database technology. The move to 64 bit was timely for them too.
That was all very well when they were selling thick client technology. It was never quite so good with the move to a server for processing as the scalability was a hard problem.
Now, they have QlikSense which is just not as good as the old QlikView. In desperation, they've bolting all sorts of targetted products on to their range.
For those with long memories, Cognos PowerPlay was in a similar position in the mid 90s. Well ahead of the competition, but never managed the move away from client technology.