Azur Lane

The Chinese are usually known for their cheap copies; however this time they have completely surpassed the original in quality. at furst sight Azure Lane is a complete rip-off from KanColle: In both anime ships from the WW2 era are moe-anthropomorphized as cute anime girls, even several lolis in both anime as well. Both take place in an alternative WW2 where they have to fight aliens which also look like girls. Both anime have a lot of slice of life scenes besides the naval combat scenes...or more like girls surfing over the water and shooting at enemies in both anime. Also both anime are based on a lootbox game. So if they are so similar, why is Azur Lane so much better then? Well, Azune Lane has much more colorful character design and some characters even have kemomini (animal ears). Also KanColle has only Japanese ships while Azur Lane is much more suited for an international audience (has American, British, German and Japanese ships) read more 

Ships from World War 2 anthropomorphized as girls of various sizes (from loli to onee-sans) that fight agains a foreign invasion, though the fighting scenes are mixed with slice of life-y scenes of the girls just hanging out. You won't get more similar than these. 

Well, both are a side-scrolling shoot 'em up video games ... although Azur Lane is of Chinese origin, and KanColle is Japanese, both are based on the use of boat avatars in the form of girls, Kanmusume, i.e. ship anthropomorphic of mostly minor girls, not to mention very beautiful teenagers and Lolis... they also base their story on the same era, the Second World War, and although KanColle is beautiful and very exciting, I can't get along with shallow history by the Diomedea study, on the other hand although Bibury has no experience of cheering, they knew how to center the history of Azur Lane in a mature way, not only placing Enterprise with the center of the whole plot, but also without making the plot turn only around her, but also not making plot twist and better yet show us the argumentative arc seen from other secondary characters, Enterprise is important in history, but it is not the only one that has something to tell about the War. That is very exciting, in this kind of games that are taken to anime, the idea is to see several approaches to a problem that afflicts the whole humanity... War. In that sense, both KanColle and Azur Lane, as well as other military animes, try to tell us a story from the eyes of a country that lost WWII and was subjected to a nationalist totalitarian ideal for years that left it almost on the verge of its extinction cultural... showing us what happens when extreme ideas of a sick love towards the nation, drives people crazy and makes their feelings and behaviors more primitive, hate, anger, xenophobia, contempt for other cultures that are not mine.  read more 

Similar themes of ships who have been resurrected as girls. There are a trifecta of these series, Azur Lane, Arpeggio, and KanColle. Arpeggio concentrates on philosophical issues, KanColle on action, and AZ a mix of the two. 

Have girls based on ships. They fight monsters with weapons transfixed on their body. 

Both anime are gacha game adaptations of games about shipgirls. Shipgirls are basically anthropomorphic ships or in other words warships turned into anime girls. They both have a very similar premise; shipgirls have to fight the evil aliens. In Kantai Collection these aliens are the Abyssals and in Azur Lane they are the Sirens. Azur Lane also has the added aspect of the different factions on shipgirls who are in conflict with each other. Azur Lane is kinda like Kantai Collection but with less slice of life. To be honest I think Azur Lane is just a budget Kantai Collection that has worse animation, worse writing and a worse story. read more 

I recommend it because it has the same theme which is ship girl. 

The linear historical storyline is a bit unclear as it lacks specific objectives. However, the unique and captivating character designs make up for it. One thing to note is that this anime contains some NSFW content.  

Both anime have an all female cast who have to save the world with their powers and magical weapons. 

both have A as their first letter , jokes. they offer one of the widest arrays of waifus to the point where it is illogical to not even have a favorite in mind. character designs for both are cute and astonishing imo, with satisfying animation highlighting each of their combat styles. narrative for each is rather shallow but keeps the story-telling intact despite the action. (TLDR: if you like an all-girl waifus-in-action anime, these are your cup of tea) 

do you want to see cute girls fighting in an insane way? these two are perfect for you 

Perhaps it is the connection with war, the sea, the WWII, but the truth is that Japan is a fetishist of everything military and if the military can include minors in tanks, ships... or airplanes... without a doubt It will be worthy of your exciting repertoire of rare fetishes! I insist, Japan is the only country that manages CGDT with the war. Underage girls in school, never underestimate the power of a Sailor, short skirts, girls' faces, and weapons of war...