No-one on Earth admits to knowing whether or not there is smart life on other celestial bodies (apart from some who claim to have personal experience that there is and that they communicate with and walk among us, and some who claim to know that there is not because they feel that science precludes it because of technical difficulties in overcoming the problem of distance.)
My hunch is that there is intelligent life out there, and that communication could take place. But although there is significant evidence pointing to the existence of 'visitors' in our near-earth space, there seems a reluctance to communicate openly. Entities which could manage to visit (physically or digitally) would be far ahead of our technology, so far ahead in fact that they might well see us as interesting ant-hills harbouring primitive life, to be observed but not interfered with.