It's hard to get excited about software for lawyers, and I think that's why Disco has flown under the radar a bit, but I think these guys are going to be huge. They've made exponential improvements in e-discovery software.
Having worked in e-discovery for many years, "exponential improvements" is a huge overstatement. What they have is in pretty much any e-discovery product on the market.
And they are missing a huge piece--predictive coding and advanced analytics (email threading and near-dup are EXTREMELY common). If you are in NLP, ML and/or IR, the legal industry is probably one of the most exciting places to be. Huge datasets, available annotators and tons of money. It's a red-hot lab of state of the art techniques being tried in the real world instead of on the Reuters, 20-newsgroups, Enron, and other "canned" datasets.
The other thing is that lawyers don't get re-trained. Relativity has won the current generation of lawyers, and Relativity is a good product (unlike the products it replaced, Concordance and Summation). It will not be easy to displace.
On the research end of things, NIST's TREC has a legal track, and that's probably the best place to look for what's happening in the "applied research" space of the field.
Any and everything to do with text analytics so that lawyers can find relevant documents faster. Concept searching (LSI, LDA, other topic models), query expansion, clustering, network analysis (emails), etc.
I suppose you could say made exponential improvements if you take a very small exponent. What they have done is to make a nice interface and apparently fast search.
One concern that I have is this "Secure Infrastructure--no installation required". This suggests the cloud. The other is "Upload your data by FTP".
Think about e-discovery for a moment. The toxic material stored is pretty much a superset of all known toxic material--PCI, PII, HIPA, and so on. Many customers require physical control of where this information goes. Zero installation means that it is not a server under your control.
