First, we are not alone in the Universe, therefor there must be extraterrestrial life. When we find it is just a question of time (if we don't kill each other before it happens).
SETI@home and Astropulse are funded by grants from the National Science Foundation, NASA, and donations from SETI@home volunteers. AstroPulse is funded in part by the NSF through grant AST-0307956.