Literally, everyone is saying that 3I/ATLAS might be an alien object.
a 30-40% likelihood
Okay, that's a lot. Probably, many won't agree since we don't have enough data (too few observed interstellar objects - only 3) to evaluate the probability.
The object can be natural btw while it can have alien equipment on it - who knows, many from several civilizations, and who knows maybe all of them are AIs who already connected each other, lol, and having AI parties there on 3I/ATLAS.
RE: Harvard Astronomer Says 3I/ATLAS May Be Alien Probe: SETI Responds