This is a selection of well known theater companies who produce amazing work but aren't based in one space.
Third Rail: Site specific, immersive performances.
The Team: Brooklyn based ensemble that creates collaboratively written, imaginative plays.
Wooster Group: New York based experimental theater company. Weird stuff!
Elevator Repair Service (ERS): New York based company that often uses text as the basis for collaboratively imagined, highly-experimental productions.
NYC has one of the best theater scenes in the entire world and offers everything from huge broadway venues to tiny underground performance spaces. This page has some resources for ways to get discounted tickets to NYC shows and highlights some affordable (and slightly less affordable) theater venues beyond Broadway in NYC. Many of the spaces listed below are offering free or cheap virtual programming during the pandemic.