Both. I perform and write solo. I also collaborate with three musicians and have collaborated with them since 2006.
Alone, although I previously worked with others in the group Codex Machine.
I have been a solo artist , penning my own songs since 2001. More recently, since 2009 I have been working with my band Stelladeora, in creating high energy, in your face rock songs. (Stelladeora is Justina Carubia on vocals, Avinash Patel on guitar, Neil Brown on bass, & Mike Lyon on drums).
My recorded work is almost exclusively solo. The improvised accompaniment is solo unless you count the improv troupe performing over it. I would like to get a band together, especially now that I have an album's worth of music to play, but if I don't have anyone to work with then I don't mind working alone.
I work alone. I play many instruments and also produce my own music. However, I engage a drummer and bass player to record those parts and also for live
I work alone, but I wouldn't mind collaborations with other artists in the future. :)