EF is a relatively new Accelerator (< 4 years I think) which essentially means that their early incubated startups will only now be showing their real potential. IMO their future seems both solid and exciting : 3 out of top 5 up-and-coming AI startups in London have been created through EF cohorts - #1 being Google's DeepMind.

via http://uk.businessinsider.com/10-british-ai-companies-to-loo...