Both Echelon and NordicTrack offer probably the most comparable. New comer to the smart exercise bike market MYXfitness (currently not available in the UK) offer's more off bike exercises, but you do have to downgrade to a belt drive and mechanical friction resistance  - and there isn't quite the same community hype as Peloton yet.  All offer virtual and off bike exercises classes via digital platforms. Bowflex are another growing brand, which offers not only an on-line access to workouts, but also extensive compatibility to other virtual platforms such as Zwift and Peloton itself.