Rooted neither in the grounded rock world or the spirited classical genres, Zwerm explores and exploits reaches of their own: Jacks of all trades and no where to hang their hats - or at least nowhere to laze about and settle down in. - Koen van Meel, Kwadratuur  

An exciting, sometimes alienating and always quirky musical discovery you rarely get to hear. 
- Goddeau​

​Obvious contender for album of the year.  - The Wire 
​
In an nonacademic way they made a fresh translation of the spirit of the experimental avant-garde. - De Standaard ​​

Zwerm was founded in 2007 and has collaborated with many artists including Fred Frith, Mauro Pawlowski, Larry Polansky, Eric Thielemans, Yannis Kyriakides, François Sarhan, Mark Vanrunxt, Sheila Anaraki, Etienne Guilloteau, Stefan Prins and Serge Verstockt.


​Zwerm is Toon Callier, Johannes Westendorp, Bruno Nelissen and Kobe van Cauwenberghe