The Meclanti was a cybernetic intelligence encountered in the 23th century by Starfleet. Operating on a type of logic that was completely its own, it did not recognize any other intelligence it encountered because of differences in behavior and actions. Rather, it classified most of the universe outside itself as "random" and as a result caused a number of incidents with other species in its search for energy to sustain itself.
It is suggested during first contact with the Meclanti that the ship encountered was "manned" by several Meclanti intelligences due to the internal communication that was detected on it.
They have a language that was completely alien and could not be easily translated by a universal translator. Even their exact name was unknown, with the name "Meclanti" given to them by Sturek, naming them after Josef Meclanti, a 22nd century revolutionary in the field of cybernetics.
In 2288, when the USS Enterprise-A was patrolling the Klingon Neutral Zone with the USS Truong, the Meclanti destroyed the Truong near the Javik VI colony. They then proceeded to attack Kurat I, a hospital site under the command of Commander Vor, who wanted no harm to come to the Klingon patients. David Forester was able to stop the attack by mimicking the Meclanti, and then used diplomacy. He and his crew also stopped the destruction of the Kurat sun by the Klingons, which would have destroyed everything in the system, including the Enterprise and the Meclanti.