I've come across Quilted [5] and Colab [6], two worker-owned and run cooperatives working in the tech space in the U.S. Both have a fairly impressive lineup of worker-owners and compelling portfolios, indicating that the model can really work.
Does anyone know of other examples of such coops, both in the U.S. and around the world?
1: http://www.nytimes.com/2014/03/30/magazine/who-needs-a-boss.html
2: http://shiftchange.org/about/
3: https://news.ycombinator.com/item?id=7618971
4: https://en.wikipedia.org/wiki/Worker_cooperative
5: http://quilted.coop/
6: http://www.colab.coop/about