He is also a frequent collaborator of comedy punk rock act Bo La'Bar featuring his Nail Within co-members Evil Haim, and Useless ID members Ishay Berger and Jonathan Harpak.

Matan Cohen formed Betzefer along with vocalist Avital Tamir and drummer Roey Berman as a one-off band for a high school gig in 1998.

and later they started recording their own material, releasing Pitz Aachbar in 2000, Some Tits, But No Bush in 2001 and New Hate in 2003.

In 2001, Matan joined former Azazel and Betrayer members to form a new melodic death metal project by the name of Nail Within.

Recently rejoined the band as all of its members reunited in November 2007 for a one-off reunion show along with plans to record a new album in the future.