Suisei no Gargantia

Similar after apocalypse premise. Once successfully survive the apocalypse, humans form small colony. But information of the cause of the apocalypse still remains classified. After stories develop, the dark truth behind the cause of the apocalypse slowly revealed. These themes also includes morality concern, war between species, classified information, ancient civilization, and human experiment. One retell the story with the supernatural and the other one with sci-fi. 

Battle for survival. The eradication of a species. Science gone wrong. 

In both series, there are dark secrets that becomes unraveled as the episodes progresses. These involve humanity and their origins. Among other factors, there is the concept of morality that comes into play regarding civilization and the people/creatures in them. From that, there is also conflict that results in battles/wars between the two sides. There is supernatural elements present in both series that is a thrilling ride as our main characters takes on an adventure that they may never forget. 

In both anime, there's a war between species. Information is often censored in each society and both protagonists receive a revelation.  

Both have somewhat of a Utopian setting but turns into a major plot twist towards the end.  

Both shows contain similar human vs supernatural rivalries, as well as similar plot twists with regards to the nature of said supernatural  

Out of everything, Suisei no Gargantia reminded me most of this. Setting aside difference between one another and learning about the wonders of life. 

The main character's peaceful life changed. He meets a group of people who are in a similar situation and decides to help them out. Both series has the main protagonist who is put in a new surrounding.  

In both series, a main protagonist gets involved with a mysterious character after a certain incident. In Eureka Seven, it's Eureka. in Suisei no Gargantina, that mysterious character is Ledo. These two characters have trouble communicating with others or understanding others' feelings. However with the help of their new friend, they are able to understand the world a bit better. There is mecha/science fiction themes present in both series. In fact, the mysterious character present relies on them and treats it as somewhat of a friend. The backgrounds of both series also feels somewhat similar; giving off that science fiction outlook. Both series also has drama, comedy, and of course action. read more 

Both have space, an alien race that causes harm, and mechas. 

Both include mechs, and a character that isn't exactly human. Ledo is similar to Eureka at the beginning of the series, he has no attachments to life, nor human feelings. He is however a human, but not entirely. It looks like they are created not born. It's a definitely a good watch. 

Now both involve moving to a "new" planet due too the original being inhabitable and using giant robots to fight their enemies. As well as having the main protagonist being slightly emotionless. All in all slightly similar story and I feel if you enjoyed eureka 7 you would enjoy this. 

Both share visually the same similarities of unique elements such as having the feel of space, mecha, sci-fi . War is involve and there's a struggle of trying to survive and help each nation to defend themselves from outer conflict. Protagonists also develops really well and is very likable in most of the story. Both stories deal with trying to solve problems and restore peace instead of fighting. There's a lot of action that will keep you on your toes. If you're a fan of sci-fi and action blended with suspense/thriller, both are definitely worth checking out. Highly recommended for sci-fi fans! 

Suisei no Gargantia and Aldnoah Zero both convey the sci-fi theme with its setting and characters. In particular, the main male protagonist has a strategic mind and is adapt at piloting his mecha during warfare. And speaking of which, humanity becomes endangered when an invasion takes place that threatens their very existence. Urobuchi Gen is involved as part of the staff so expect some familiarity with the presentation. Throughout both series, there are secrets that invites questions. Recommended for mecha fans and anyone into sci-fi gimmicks. 

Both main characters are very intelligent and skilled in combat they are also calm minded so much that they seem emotionless to the things around them. Both series involve a inferior race that are fighting a more intelligent and developed beings. Both have amazing animation and clear visuals to every little detail, these two series also have Action, Mecha, Si-Fi genre elements.  

Suisei no Gargantia and Aldnoah Zero both convey the sci-fi theme with its setting and characters. In particular, the main male protagonist has a strategic mind and is adapt at piloting his mecha during warfare. And speaking of which, humanity becomes endangered when an invasion takes place that threatens their very existence. Urobuchi Gen is involved as part of the staff so expect some familiarity with the presentation. Throughout both series, there are secrets that invites questions. Recommended for mecha fans and anyone into sci-fi gimmicks.  

In a world where people live on moving islands in an endless ocean, a soldier who has only known war ends up stranded in a peaceful society. There's an emphasis on a lost history and the antagonists are dogmatic militants. Children of the Whale has magic and seems more centered around violent conflict. Gargantia has giant robots and spends a lot of time on mundane activities. 

If you like one, you'll like the other. Literally the same concept: world is taken over by water/sand, humanity survives by living on floating ships/islands, character from "another world" comes along, entire cast is introduced to a new concept of their world, etc. Both are very good, interesting, and will grip you by the first episode! Highly recommended! At least give the first episode a shot. And know that it only gets better from there!  

Both titles share almost the same setting: A drifting fortress with peaceful inhabitants who pick up an unusual individual.  

- Both anime belong to the mech genre. - Both Aoba and Ledo are suddenly pushed into a lifestyle they are unfamiliar with. Ledo goes from knowing nothing but being a soldier to everyday life on Earth, while Aoba is pulled from his everyday life and thrust into being a soldier in a war. - Both Aoba and Ledo are pulled from what they know. Ledo ends up on Earth, previously thought to be an abandoned and uninhabited planet, and Aoba is sent to the future. - Both anime have very similar feels to them, both during the light-hearted parts and the more serious parts. 

Okay so both anime fall into the mecha genre. Both of the main characters are thrown into an unfamiliar lifestyle in which they have to adapt to survive (Aoba-> future; Ledo -> Earth). The main characters both drive "special" mecha that makes them unique in their new setting. All in all, the shows have a very similar feel. While I was watching Suisei no Gargantia, I kept thinking about Buddy Complex and how a lot of what was happening was similar. Basically if you liked one, you may like the other 

If you like mecha, then you will like these two. Or, in other words, you really should try (if similarities don't bother you). I have spoken. 

From the first opening scene of the civilization on a spaceship reminded me of Macross Frontier but more than that this is a piloting mecha anime taking place in space against a hostile non-humanoid alien force. 

From both series, there's the setting of a space colony in which its technology seems to be more advanced than our modern times. Then, there's the main male protagonist who certainly meets one of the main female protagonists of the series after a certain events. There is some strange origins related to the main male protagonist as well. The series also adapts the usage of mecha warfare that brings out the action. There is also strong science fiction themes involved from both series. 

Space colony, heavily science fiction setting. Humans do battles with super buffed "octopus" aliens, in mecha machines. Both series heavily focus on the state of the mind of the protagonist, who pilots the mecha. 

They have elements of sci-fi and takes place in a futuristic setting. But for both series, life never comes easy for the main protagonists as they struggle to survive and cope in their world. There is the theme of survival as mysterious enemies threatens the characters' very existence. But among those enemies also emerges resistance that battles them. There is relationship development in both series and concepts along with certain plot twists. If you're interested in sci-fi anime with a setting involving characters battling for survival, then take a look at these two shows. 

Humanity is under threat by an alien species. Flying mechs and killing them. Gargantia in space, really. 

In these shows humanity is in similar situation although setting is bit different. SnK is mostly set in Space and on Space ship, where SnG is mostly set on planet although it has some space scenes. Also both of these shows have mechas. Main characters have some similarities. 

The main protagonist in both series are a battle-hardened soldier trained since childhood but are suddenly thrust into a more peaceful way of life far away from the battlefield. Although the story is generally serious, comedic moments can often be found as the protagonist then spends the majority of the time learning and getting accustomed to their new settings with help from other main characters. You can also find a giant mech that acts like more of a partner & friend, having full, idealistic conversations with the main protagonist in both series and sometimes also ends up surprising the protagonist in some situations. 

From both series, there's an tense atmosphere involving the military and the main characters. The usage of mecha is incorporated into combat and there is a mysterious vibe regarding the origins of the main character. Additionally, it seems that the main protagonist from both series lacks common sense of the real world. They also gets off with a rocky start with the main female protagonist in the series. There is action, drama, and some science fiction themes present from both series as well. 

Both anime have a soldier-boy protagonist -- Ledo and Sousuke Sagara are remarkably similar -- and focus on his adaptation to society. Both are considered to be mecha-anime. Both are a mixture of goofy, slice-of-life entertainment and fast-paced action.  

I think Deca-Dence's twist and Gargantia's basic concept have more similarities than it may first seem like. At their core, both have a focus on a character trying to figure out their own issues by living in a world alien to their own, and getting inspired to gradually rise above themselves and the propaganda distilled in them. Both are also chiefly inspired by a girl who matters dearly to them. Deca-Dence is more about rising against the system whereas Gargantia is about protecting a new system from the old one, but both fight back against the world they were born into. 

Both series present a dystopian future in which what remains of humanity lives in armored, mobile megacities to protect themselves from monster attacks. In Suisei no Gargantia they live in giant ships, since the land has been covered entirely with water. In Deca-dence they live in a large mobile fortress to protect themselves from the attacks of the monsters which have devastated the Earth. In both series, as the plot progresses, we will find out the reason for the dystopic situation they are in. 

Both are great action mecha series who started airing in spring 2013 and provide great mecha battles and a little romance in between. The only big difference in the animes is that Valvrave starts with a boy who is used to a peaceful live and has to adapt to war while Gargantia starts with a boy who is more like a programmed soldier then a human. If u like a slower pace series thats more story driven i would go for Gargantia and for a good fast pace action series i would go for Valvrave although this is just my opinion.  

A boy from a military life style crash lands on earth where everyone is peaceful and killing anyone is absolutely forbidden. He must come to learn what it means to be peaceful, and lose his sense of war. Kind of like L-elf. He also has a boss robot like Valrave.  

- similar where civilization is somewhat primitive while having mechas - similar voice actors - action against the unknown or aliens 

They start off similarly and I feel there are lots of parallels in the first few episodes. The endings are completely different though, so it's definitely worth a try. Different twists in both anime so you won't feel like you're re-watching Gurren Lagann. 

These shows have giant robots, space, diverse cast.  

Both are centered around a male soldier having to start out in an unfamiliar environment with a robot sidekick. Both take a teen girl hostage, and both must adjust to their new lives . 

In both series, there's science fiction themes but more importantly, it involves a main male protagonist whose lives are changed forever after a certain event. They meet a girl and they help adjust to their new conditions/place in their world as they discover new ideas and learn about the world that they reside in. Both series' main male protagonist also seems to have strange origins and a mysterious power. It is invaluable as adversaries from both series threatens the lives of others as well as the world that they reside in. 

Both series explore a similar concept of a post-apocalyptic crisis warranting Earth uninhabitable, and the surviving humans seek a new home in outer space. Both series' viewpoints are from a space-dweller's whose whole perception of Earth is grounded on the fact that it is uninhabitable, and the protagonist discovering that there is more to Earth and life on Earth than what the upper echelons of authority in their society suggest. They also share the visual dichotomy between the environments and inhabitants of Earth and the metallic confinement of outer space and their respective inhabitants. 

Both have a similar feeling and have the mix of super advanced technology and a peaceful civilization. Both have strong character development, and eventually a plot twist most wouldn't expect. 

The main characters come from another world, and they are suddenly stuck in the earth, having to learn to live as any other ordinary human.  

Gargantia and EFP are both written by the same person with similar premises, so they resemble each other quite a lot. If you enjoy one, you will definitely enjoy the other. Both are about a person who goes to a new place, only to find their perception of the world turned upside down. They both raise questions for the viewer about the way the protagonist should live their life. They're also both sci-fi with post-apocalyptic settings.  

The basic concept of both anime is quite similar: They feature a male protagonist, that knows nothing but war and fighting and suddenly finds himself confronted with a (more or less) peaceful and technically less advanced community, that he slowly learns to appreciate - mostly because of a young woman (or, in case of "Macross Zero", two young women). This development is overshadowed by the raging war and mysterious aliens. "Suisei no Gragantia" is more humerous and colourful though. 

Suisei no Gargantia Hero gets trapped on "Alien planet" Hero has to learn to fit in with a new society Mecha anime vs Alien + Heroic Age Hero leaves "Alien planet" Hero has to learn to fit in with a new society Mecha anime vs Alien 

As someone who generally doesn't like mecha anime; these are two mecha anime I actually did enjoy. Also, they have some similarities and contain similar plot twists. Both anime have a main character that gets seperated from their home, and end up in a poor isolated area. The war against the DRAGONs in Cross Ange is also very similar to the war against the Hideaze in Gargantia. The main difference is that Gargantia contains more slice of life, while Cross Ange contains more ecchi. 

Both are mature anime series with a ghibli-like world, both deal with adventure and politics, and have one lively female around the main character, another similarity is that there's a group of religious fanatic people trying to mess with MC and his friends. Both series has a lot of potential but kinda miss the expectations.  

While they do not have the same premise, they present science fiction in a form that is appealing. The main male protagonist in both series are both mysterious but experienced in battle with a personality that seems to be more distant. There's usage of mecha and other space gadgets used by enemy forces as there seems to be rebellion/war/struggle between certain colonies/empires. The main male protagonist is involved in these struggles and experiences both states of peace and cruelty. There is drama, action, comedy, and a mysterious background related to the origins of both series. 

Kenran Butou Sai: The Mars Daybreak and Suisei no Gargantia both have a unique blend of industrial and nautical elements in their respective settings which give off similar vibes. If you wanted to see more of that type of setting after watching one, I would suggest checking out the other, as it does a good job to scratch that itch. 

They both have a young male protagonist who lands on a wild planet, and both have interesting worlds.  

Both take place on a world submerged underwater with people fighting for supremacy with an alien race. They have many similar ethics and main characters. 

If you love fantastic character development and the journey a hardened soldier takes to find their humanity again you will love Violet Evergarden. There is not as much action, but the music and art is on point.