Kim's friend and KKW Beauty collaborator Winnie Harlow noted the similarity between Psalm and his big sister Chicago West, who was also born via surrogate.
"Looking just like a tanned Chi! 😍👼🏽," the America's Next Top Model star wrote.
Khloe Kardashian's best friend Khadijah Haqq commented: "Hi Psalm, he's such a lil man."
While Kim and Kanye's publicist Tracy Romulus called him a "perfect angel baby".
Kim is also mother to North West, Saint West and Chicago West with her rapper turned fashion designer husband.
The sweet snap comes after weeks of controversy for the Keeping Up With the Kardashians queen who was accused of cultural appropriation and social tone deafness for the name of her new shapewear venture, Kimono.
Following public uproar over the brand and a personal plea from Japan's Mayor of Kyoto, Kim announced she would change the name out of respect to the traditional Japanese dress.
Writing in an Instagram post, Kim said she is "always listening, learning and growing" to public feedback.
"Being an entrepreneur and my own boss has been one of the most rewarding challenges I’ve been blessed with in my life," she began.
"What’s made it possible for me after all of these years has been the direct line of communication with my fans and the public. I am always listening, learning and growing - I so appreciate the passion and varied perspectives that people bring to me.
"When I announced the name of my shapewear line, I did so with the best intentions in mind.
"My brands and products are built with inclusivity and diversity at their core and after careful thought and consideration, I will be launching my Solutionwear brand under a new name. I will be in touch soon. Thank you for your understanding and support always."