Many have linked Attack on Titan to Evangelion since long before AoT's anime came to be, for highly spoilerific (NOT MECHA) reasons. To be slightly less vague, Eva deconstructed the feel good / manly / heroic mecha genre with a combination of depression and tragedy. And, to a lesser extent, AoT went against the flow of shounen fighting cliches/tropes enough to make it stand out in the same way. So, both series' differences from the norm makes them comparable, in essence.
Unlike in its manga, near the end (ep24) AoT's anime had Eren act very much like Shinji from Eva: needing a peptalk
Both series revolve around Humanity trying to fight powerful enemies they don't quite understand, and young people are forced to take up the fight. Tragic events are common occurrences. giant humanoids are used to fight. Shingeki likely was heavily inspired by Evangelion.
The humanity is trying to survive an attack of almighty titans, after episode 8 there are more similarities...
Mankind is in the brink of elimination as mysterious creatures suddenly come from unknown origins to end their existence.
The only hope for man is in the hands of a young boy who has the ability to control a power equal to these mysterious creatures.
This power is not easily controlled however as the boy at times allows this ability to go berserk as he encounters emotionally driven situations.
Epic battles occur as the boy controls this power to combat these enormous titans amongst a ruined city.
The question is, am I describing Shingeki no Kyojin or Evangelion?
Both are similar with a very dark tone and focus on the human condition. Attack on titan focus more on existentialism and ethics. It also is action heavy; the visuals alone make it a good watch. Whereas Evangelion focuses on mental illness and transhumanism. Evangelion tends to be lighter on action and violence. However it covers much more mature content and isn't far more disturbing.
Humanity unites against monstrosities. Shingeki feels like Medieval Evangelion sometimes. Evangelion has more depression, Shingeki has more despair.
Both deal with earth being under attack by monsters (titans and angels), both have young people who are tasked with protecting it, the main characters both have difficult relationships with their fathers.
Some unknown origin creatures invaded humanity, both are constantly fighting a losing battle while human trying to survive.
Both series deal with ambiguous creatures that threaten all of humanity, a young protagonist with a connection to said creatures, and have a more of a realistic take on their respective genres.
This seems to already be a popular recommendation, so I"ll be brief:
-giant monsters that have almost wiped out all of humanity.
-organizations set to wipe out those said monsters.
-a lot of plot twists that (more so in SnK's case) leave you hanging in a cruel way.
-utterly messed up and convoluted stories and characters.
They are both anime that have messed up my brain in a good way, and I love Evangelion and Kyojin for that.
Humanity is in despair and they are fighting with the very things they want to kill.
Humanity fights back against giant mononstrosities that threaten to wipe out the human race. Both are exciting anime with plenty of action in addition to beautiful visuals, but each has a different setting and focus. AoT is a dark fantasy with a greater focus on mystery and world-building, while Evangelion is more of a psychological thriller that uses its modern day sci-fi/mech setting as the backdrop.
I would go far as to say the Shingeki no Kyojin does have it far share of similarites to Neon Genesis Evangelion. Behind all the window dressing, the to show are quite similar if you think about.
Both stories take place in a post post apocalyptic world meaning the apocalyspe had already has prior to the series start and that the world is slowing rebuilding from said apocalypse and have devise ways against their oppression since. Humanity is own falling legs in spite of oppressive and enigmatic enemy. In Neon Genesis Evangelion the oppressive force is the Angels. In Attack on Titan its the
Both have the same genres
Both have pilots
Both have great osts
Both will make you want more
Both will make you really think
Both are really good
fight for survival of human race, very hard to kill enemies, lost of psychology what do you want more lol
Attack on titan focuses on fighting with superior (Titans) beings and retaking the walls. Neon Genesis focuses by defending their city by superior (Angels) beings from causing 3rd Impatct (end of the world), while neon genesis does character development very well with everyone being depressed, Attack on Titans tries to by brining male tears.
SNK and NGE may have a very different fanbases, but when it comes down to it, there are many things that are similar about these two series.
SNK and NGE are series that both revolve around a young both trying to save his city/town/world from giant monsters. Even though the devices used to destroy these monsters are different (three dimensional maneuver devices in SNK, giant human-operated machines in NGE)
There are also three teenage characters who are pressured to do a lot of risky work in order to save their city/town/world. Although the I believe that that Shinji, Misato, and Rei and
The three main characters in each show are very similar. Both main characters have fathers who abandoned them at a young age, and their mother also died when they were young. Both have a group of "monsters" (Titans and Angels) that humans have to fight against in order to survive as a species. Both of these shows are also very dark and psychological.
Both are set in a post-apocalyptic world with enemy's that are far superior in strength to our protagonists with a teenage boy as the lead protagonist. Both anime have strong sets of female characters in it's cast, and the main protagonist's father in both anime shows no interest in their son's lives.
Both of these shows have similar setup where humanity is in danger because of strong enemy that's trying to push humans to extinction. There is mystery behind those attacks.
Action in both shows is exciting and well executed.
-Teenagers are given the responsibility of defending humanity
-Both have a superior life form attacking humanity (Angels, Titans)
-Similar main characters (Asuka = Eren, Rei = Mikasa, Shinji = Armin)