[Ente]

You're right. RTM, or rather, its internal flow assembling component RTS can be extended with plugins in order to extract and append more information for a flow. For example there are plugins for:

* regex matching * tcp state machine following * http * dns * bgp * smtp * icmp * pcap splitting by flows * ...

Using them will have an impact on performance, which is why there are no numbers regarding speed on this page. It's always a fit between: what one can see and what one wants to see. It's beeing sold as a privacy feature ;). Nevertheless a security expert has to configure the software so that it fits the environment.

In contrast to other projects, the general assumption is that RTM is not the 'one solution you implement and you're secure' but rather a platform on which you can build your security upon.

Sorry for the generic answer: I don't know Silk/Flowbat well enough in order to provide a in depth comparison.