The Best Alien Movies on Free Services

What it's about: A team of explorers discover a clue to the origins of mankind on Earth, leading them on a journey to the darkest corners of the universe. There, they must fight a terrifying battle to save the future of the human race.

Where to Watch: Available to watch free online (Peacock), stream on a popular subscription service (Prime Video & HBO) & rent or buy from $3.99 on 4 services (iTunes, Google Play & 2 others).

What it's about: A teacher opens a time capsule that has been dug up at his son's elementary school; in it are some chilling predictions -- some that have already occurred and others that are about to -- that lead him to believe his family plays a role in the events that are about to unfold.

Where to Watch: Available to watch free online (Peacock) & rent or buy from $3.99 on 5 services (iTunes, Google Play & 3 others).

What it's about: After a gentle alien becomes stranded on Earth, the being is discovered and befriended by a young boy named Elliott. Bringing the extraterrestrial into his suburban California house, Elliott introduces E.T., as the alien is dubbed, to his brother and his little sister, Gertie, and the children decide to keep its existence a secret. Soon, however, E.T. falls ill, resulting in government intervention and a dire situation for both Elliott and the alien.

Where to Watch: Available to watch free online (Peacock) & rent or buy from $3.99 on 5 services (iTunes, Google Play & 3 others).

What it's about: Nada, a wanderer without meaning in his life, discovers a pair of sunglasses capable of showing the world the way it truly is. As he walks the streets of Los Angeles, Nada notices that both the media and the government are comprised of subliminal messages meant to keep the population subdued, and that most of the social elite are skull-faced aliens bent on world domination. With this shocking discovery, Nada fights to free humanity from the mind-controlling aliens.

Where to Watch: Available to watch free online (Peacock) & rent or buy from $3.99 on 6 services (iTunes, Google Play & 4 others).

What it's about: A team of commandos on a mission in a Central American jungle find themselves hunted by an extraterrestrial warrior.

Where to Watch: Available to watch free online (Peacock) & rent or buy from $3.99 on 6 services (iTunes, Google Play & 4 others).

What it's about: Seymour Krelborn is a nerdy orphan working at Mushnik's, a flower shop in urban Skid Row. He harbors a crush on fellow co-worker Audrey Fulquard, and is berated by Mr. Mushnik daily. One day Seymour finds a very mysterious unidentified plant which he calls Audrey II. The plant seems to have a craving for blood and soon begins to sing for his supper.

Where to Watch: Available to watch free online (PlutoTV), stream on a popular subscription service (HBO MAX) & rent or buy from $3.99 on 5 services (iTunes, Google Play & 3 others).

What it's about: Matthew Bennell notices that several of his friends are complaining that their close relatives are in some way different. When questioned later they themselves seem changed, as they deny everything or make lame excuses. As the invaders increase in number they become more open and Bennell, who has by now witnessed an attempted 'replacement', realises that he and his friends must escape or suffer the same fate.

Where to Watch: Available to watch free online (PlutoTV), stream on a subscription service (Shudder, Hoopla & Kanopy) & rent or buy from $3.99 on 3 services (iTunes, Microsoft & Vudu).

What it's about: For four years, the courageous crew of the NSEA protector - "Commander Peter Quincy Taggart" (Tim Allen), "Lt. Tawny Madison (Sigourney Weaver) and "Dr.Lazarus" (Alan Rickman) - set off on a thrilling and often dangerous mission in space...and then their series was cancelled! Now, twenty years later, aliens under attack have mistaken the Galaxy Quest television transmissions for "historical documents" and beam up the crew of has-been actors to save the universe. With no script, no director and no clue, the actors must turn in the performances of their lives.

Where to Watch: Available to watch free online (PlutoTV & PopcornFlix), stream on a subscription service (Philo, fuboTV & TVision), stream on a popular TV everywhere service (IFC) & rent or buy from $2.99 on 6 services (iTunes, Google Play & 4 others).

What it's about: A group of cold-blooded killers find themselves trapped on an alien planet to be hunted by extraterrestrial Predators.

Where to Watch: Available to watch free online (Tubi & Peacock) & rent or buy from $3.99 on 4 services (iTunes, Google Play & 2 others).

What it's about: In 1979 Ohio, several youngsters are making a zombie movie with a Super-8 camera. In the midst of filming, the friends witness a horrifying train derailment and are lucky to escape with their lives. They soon discover that the catastrophe was no accident, as a series of unexplained events and disappearances soon follows. Deputy Jackson Lamb, the father of one of the kids, searches for the terrifying truth behind the crash.

Where to Watch: Available to watch free online (IMDb TV), stream on a popular subscription service (HBO MAX & HBO) & rent or buy from $2.99 on 6 services (iTunes, Google Play & 4 others).

What it's about: When some very creepy things start happening around school, the kids at Herrington High make a chilling discovery that confirms their worst suspicions: their teachers really are from another planet!

Where to Watch: Available to watch free online (PlutoTV), stream on a subscription service (Showtime) & rent or buy from $2.99 on 5 services (iTunes, Google Play & 3 others).

What it's about: After getting in a car accident, a woman is held in a shelter with two men, who claim the outside world is affected by a widespread chemical attack.

Where to Watch: Available to watch free online (PlutoTV) & rent or buy from $2.99 on 6 services (iTunes, Google Play & 4 others).

What it's about: An interstellar teleportation device, found in Egypt, leads to a planet with humans resembling ancient Egyptians who worship the god Ra.

Where to Watch: Available to watch free online (Tubi & The Roku Channel) & stream on a popular subscription service (Netflix, Prime Video & Hoopla).

What it's about: A small-town doctor learns that the population of his community is being replaced by emotionless alien duplicates.

Where to Watch: Available to watch free online (PlutoTV), stream on a popular subscription service (Prime Video, Paramount+ & Kanopy) & rent or buy from $2.99 on 6 services (iTunes, Google Play & 4 others).

What it's about: Two crew members wake up on an abandoned spacecraft with no idea who they are, how long they've been asleep, or what their mission is. The two soon discover they're actually not alone – and the reality of their situation is more horrifying than they could have imagined.

Where to Watch: Available to watch free online (Tubi & The Roku Channel), stream on a subscription service (Hoopla & Tribeca Short List) & rent or buy from $1.99 on 5 services (iTunes, Google Play & 3 others).

What it's about: When scientists discover something in the Arctic that appears to be a buried Pyramid, they send a research team out to investigate. Little do they know that they are about to step into a hunting ground where Aliens are grown as sport for the Predator race.

Where to Watch: Available to watch free online (Peacock), stream on a subscription service (HBO), stream on a popular TV everywhere service (AMC) & rent or buy from $3.99 on 5 services (iTunes, Google Play & 3 others).

What it's about: In 1993, the Search for Extra Terrestrial Intelligence Project receives a transmission detailing an alien DNA structure, along with instructions on how to splice it with human DNA. The result is Sil, a sensual but deadly creature who can change from a beautiful woman to an armour-plated killing machine in the blink of an eye.

Where to Watch: Available to watch free online (Tubi, PlutoTV & The Roku Channel), stream on a subscription service (Paramount+, fuboTV, Epix & 1 other), stream on a popular TV everywhere service (Epix) & rent or buy from $3.99 on 5 services (iTunes, Google Play & 3 others).

What it's about: 16-year-old Cassie Sullivan tries to survive in a world devastated by the waves of an alien invasion that has already decimated the population and knocked mankind back to the Stone Age.

Where to Watch: Available to watch free online (IMDb TV) & rent or buy from $2.99 on 5 services (iTunes, Google Play & 3 others).

What it's about: A police chief in the war-torn streets of Los Angeles discovers that an extraterrestrial creature is hunting down residents - and that he is the next target.

Where to Watch: Available to watch free online (Peacock) & rent or buy from $3.99 on 6 services (iTunes, Google Play & 4 others).

What it's about: A low-budget, sci-fi satire that focuses on a group of scientists whose mission is to destroy unstable planets. 20 years into their mission, they have battle their alien mascot, that resembles a beach ball, as well as a "sensitive" and intelligent bombing device that starts to question the meaning of its existence.

Where to Watch: Available to watch free online (Tubi, PlutoTV & Crackle), stream on a subscription service (Philo, fuboTV, Fandor & 3 others) & rent or buy from $1.99 on 5 services (iTunes, Google Play & 3 others).

What it's about: A representative of an alien race that went through drastic evolution to survive its own climate change, Klaatu comes to Earth to assess whether humanity can prevent the environmental damage they have inflicted on their own planet. When barred from speaking to the United Nations, he decides humankind shall be exterminated so the planet can survive.

Where to Watch: Available to watch free online (Tubi), stream on a subscription service (Hoopla) & rent or buy from $3.99 on 4 services (Google Play, Prime Video & 2 others).

What it's about: When Susan Murphy is unwittingly clobbered by a meteor full of outer space gunk on her wedding day, she mysteriously grows to 49-feet-11-inches. The military jumps into action and captures Susan, secreting her away to a covert government compound. She is renamed Ginormica and placed in confinement with a ragtag group of Monsters...

Where to Watch: Available to watch free online (The Roku Channel), stream on a subscription service (TVision) & rent or buy from $3.99 on 6 services (iTunes, Google Play & 4 others).

What it's about: Since the 1960s, a disproportionate number of the population in and around Nome, Alaska, have gone missing. Despite FBI investigations, the disappearances remain a mystery. Dr. Abigail Tyler, a psychologist, may be on the verge of blowing the unsolved cases wide open when, during the course of treating her patients, she finds evidence of alien abductions.

Where to Watch: Available to watch free online (Peacock) & rent or buy from $3.99 on 4 services (Google Play, Prime Video & 2 others).

What it's about: The residents of a small town are excited when a flaming meteor lands in the hills, until they discover it is the first of many transport devices from Mars bringing an army of invaders invincible to any man-made weapon, even the atomic bomb.

Where to Watch: Available to watch free online (PlutoTV), stream on a subscription service (Paramount+ & Kanopy) & rent or buy from $2.99 on 4 services (iTunes, Google Play & 2 others).

What it's about: Six years ago NASA discovered the possibility of alien life within our solar system. A probe was launched to collect samples, but crashed upon re-entry over Central America. Soon after, new life forms began to appear and half of Mexico was quarantined as an infected zone. Today, the American and Mexican military still struggle to contain "the creatures," while a journalist agrees to escort a shaken tourist through the infected zone in Mexico to the safety of the U.S. border.

Where to Watch: Available to watch free online (Tubi, PlutoTV, Plex & 2 others), stream on a subscription service (Philo, Hoopla, Kanopy & 1 other) & rent or buy from $2.99 on 5 services (iTunes, Google Play & 3 others).

What it's about: Two stoners wake up after a night of partying and cannot remember where they parked their car.

Where to Watch: Available to watch free online (Tubi) & rent or buy from $3.99 on 6 services (iTunes, Google Play & 4 others).

What it's about: Trapped in a remote tavern, a group of strangers must band together for survival. Outside the bar, a horde of ravenous, flesh-eating monsters are trying to break in and dine on the frightened humans inside.

Where to Watch: Available to watch free online (Tubi & Plex), stream on a subscription service (Tribeca Short List) & rent or buy from $3.99 on 5 services (iTunes, Google Play & 3 others).

What it's about: A pair of aliens arrive on Earth to prepare for invasion, but crash instead. With enormous cone-shaped heads, robotlike walks and an appetite for toilet paper, aliens Beldar and Prymatt don't exactly blend in with the population of Paramus, N.J. But for some reason, everyone believes them when they say they're from France.

Where to Watch: Available to watch free online (Tubi), stream on a subscription service (Paramount+) & rent or buy from $2.99 on 6 services (iTunes, Google Play & 4 others).

What it's about: A team from the intergalactic fast food chain Crumb's Crunchy Delights descends on Earth, planning to make human flesh the newest taste sensation. After they wipe out the New Zealand town Kaihoro, the country’s Astro-Investigation and Defense Service (AIaDS) is called in to deal with the problem. Things are complicated due to Giles, an aid worker who comes to Kaihoro the same day to collect change from the residents. He is captured by the aliens, and AIaDS stages a rescue mission that quickly becomes an all-out assault on the aliens’ headquarters.

Where to Watch: Available to watch free online (Tubi & PopcornFlix), stream on a subscription service (Hoopla) & rent or buy from $0.99 on 1 service (Prime Video).

What it's about: A novelist's wife and son see him changed by an apparent encounter with aliens in the mountains.

Where to Watch: Available to watch free online (Tubi, Vudu & IMDb TV), stream on a subscription service (Hoopla & Shout Factory TV) & rent or buy from $1.99 on 5 services (iTunes, Google Play & 3 others).

What it's about: Zane Ziminski is an astrophysicist who receives a message that seems to have extraterrestrial origins. Eerily soon after his discovery, Zane is fired. He then embarks on a search to determine the origins of the transmission that leads him into a Hitchcockian labyrinth of paranoia and intrigue.

Where to Watch: Available to watch free online (Tubi, PlutoTV & IMDb TV) & rent or buy from $3.99 on 6 services (iTunes, Google Play & 4 others).

What it's about: Underwater deep-sea miners encounter a Soviet wreck and bring back a dangerous cargo to their base on the ocean floor with horrifying results. The crew of the mining base must fight to survive against a genetic mutation that hunts them down one by one.

Where to Watch: Available to watch free online (PlutoTV) & rent or buy from $3.99 on 4 services (iTunes, Prime Video & 2 others).

What it's about: Edward Carnby is a private investigator specializing in unexplainable supernatural phenomena. His cases delve into the dark corners of the world, searching for truth in the occult remnants of ancient civilizations. Now, the greatest mystery of his past is about to become the most dangerous case he has ever faced.

Where to Watch: Available to watch free online (Tubi, Plex, Vudu & 1 other) & stream on a subscription service (Hoopla).

What it's about: When the crew of an American tugboat boards an abandoned Russian research vessel, the alien life form aboard regards them as a virus which must be destroyed.

Where to Watch: Available to watch free online (Tubi) & rent or buy from $3.99 on 5 services (iTunes, Google Play & 3 others).

What it's about: Having just returned from a mission to Mars, Commander Ross isn't exactly himself. He's slowly becoming a terrifying alien entity with one goal -- to procreate with human women! When countless women suffer gruesome deaths after bearing half-alien offspring, scientist Laura Baker and hired assassin Press Lennox use Eve, a more tempered alien clone, to find Ross and his brood. Before long Eve escapes to mate with Ross.

Where to Watch: Available to watch free online (PlutoTV), stream on a subscription service (Paramount+, fuboTV, Epix & 1 other), stream on a popular TV everywhere service (Epix) & rent or buy from $3.99 on 5 services (iTunes, Google Play & 3 others).

What it's about: As a lone spaceship proceeds on its long voyage across space, the crew are surprised to encounter a strange pyramid form. Surprise turns to horror as one by one, they discover that their darkest nightmares are all starting to become real. The pyramid has to be behind it all somehow, but how can they save themselves from its influence?

Where to Watch: Available to watch free online (Tubi, PlutoTV & IMDb TV), stream on a subscription service (Shout Factory TV) & rent or buy from $2.99 on 4 services (iTunes, Prime Video & 2 others).

What it's about: In this musical comedy, Valerie is dealing with her philandering fiancé, Ted, when she finds that a trio of aliens have crashed their spaceship into her swimming pool. Once the furry beings are shaved at her girlfriend's salon, the women discover three handsome men underneath. After absorbing the native culture via television, the spacemen are ready to hit the dating scene in 1980s Los Angeles.

Where to Watch: Available to watch free online (Tubi & PlutoTV) & rent or buy from $3.99 on 6 services (iTunes, Google Play & 4 others).

What it's about: After an alien ship crash lands in a Russian city, many who see the inside and the occupants start to question their own existence while others demand the aliens leave Earth.

Where to Watch: Available to watch free online (Tubi, Plex, Vudu & 1 other) & rent or buy from $2.99 on 4 services (Google Play, Prime Video & 2 others).

What it's about: In the early hours of the night, young David Maclean sees a flying saucer land and disappear into the sand dunes just beyond his house. Slowly, all of the adults, including his once loving parents, begin to act strangely.

Where to Watch: Available to watch free online (Tubi & PlutoTV) & stream on a subscription service (Hoopla).

What it's about: Author & amateur astronomer John Putnam and schoolteacher Ellen Fields witness an enormous meteorite come down near a small town in Arizona, but Putnam becomes a local object of scorn when, after examining the object up close, he announces that it is a spacecraft, and that it is inhabited...

Where to Watch: Available to watch free online (Peacock) & rent or buy from $3.99 on 5 services (iTunes, Google Play & 3 others).

What it's about: A young farmer assembles a band of diverse mercenaries to defend his peaceful planet from an evil tyrant.

Where to Watch: Available to watch free online (Tubi, PlutoTV, Vudu & 2 others), stream on a subscription service (Hoopla) & rent or buy from $1.99 on 5 services (iTunes, Google Play & 3 others).

What it's about: The monsters have made it into a small neighboring town in the middle of nowhere and the locals have to band with the survivors of the bar' slaughter to figure out how to survive.

Where to Watch: Available to watch free online (Plex), stream on a subscription service (Tribeca Short List) & rent or buy from $2.99 on 4 services (Google Play, Prime Video & 2 others).

What it's about: When the first manned flight to Venus returns to Earth, the rocket crash-lands in the Mediterranean near a small Italian fishing village. The locals manage to save one of the astronauts Colonel Calder, the mission commander. A young boy also recovers what turns out to be a specimen of an alien creature. Growing at a fantastic rate, it manages to escape and eventually threatens the city of Rome.

Where to Watch: Available to watch free online (Tubi & Crackle), stream on a subscription service (Philo, fuboTV & Hoopla) & rent or buy from $2.99 on 5 services (iTunes, Google Play & 3 others).

What it's about: The survivors are saved by the mysterious prophet Shot Bus Gus, who seemingly has the ability to control the beasts. He leads them into the sewers as they travel to the big city. Along the way they get help from karate expert Jean-Claude Seagal and learn that the beasts originate from a place called The Hive. Armed with this knowledge, they decide to fight back and destroy the beasts.

Where to Watch: Available to watch free online (Plex), stream on a subscription service (Tribeca Short List) & rent or buy from $3.99 on 5 services (iTunes, Google Play & 3 others).

What it's about: Luke and Roger are just another couple of college guys trying to lose their virginity. But when Luke sees something unusual, he begins to suspect that the girls on campus aren't exactly...human.

Where to Watch: Available to watch free online (Peacock, IMDb TV & The Roku Channel).

What it's about: Filmmaker Ricardo Trogi recalls the events surrounding his family moving to a new neighborhood when he was 11-years-old.

Where to Watch: Available to watch free online (Tubi), stream on a subscription service (Hoopla & Kanopy) & rent or buy from $2.99 on 1 service (Prime Video).

What it's about: Everyone knows what to do if one morning the sky would be absolutely full of UFOs: run as fast as you can. However, what would happen if the invasion started while you are in the flat of the girl of your dreams, the one you have just met?

Where to Watch: Available to watch free online (Tubi) & rent or buy from $3.99 on 5 services (iTunes, Google Play & 3 others).

What it's about: A mysterious extraterrestrial being resembling Godzilla rapidly approaches Earth. The monster, dubbed SpaceGodzilla, lands to challenge the King of the Monsters.

Where to Watch: Available to watch free online (The Roku Channel) & rent or buy from $2.99 on 5 services (iTunes, Google Play & 3 others).

What it's about: A journalist named Lee Custler (William Katt) is out jogging when a flying object passes behind him and crashes. Sheriff Joel Armstrong (Collin Brock) picks him up and they go to check it out. They find an abandoned caravan close to where the object crashed. As they discover the object and realize it is a spaceship, an Alien emerges. The Alien (resembling a giant spider with a lizard-like head and torso) then chases them, after which Lee flees to the car. However Armstrong makes a stand, trips, falls and is killed by the Alien that then leaves. A terrified Tammy finds Lee and they call the local authorities but their car is destroyed by the Alien.

Where to Watch: Available to watch free online (Tubi, PlutoTV & Plex), stream on a subscription service (ConTV) & rent or buy from $2.99 on 1 service (Microsoft).

What it's about: A blood virus infects a small group of hunters turning a father & son trip into a fight for survival.

Where to Watch: Available to watch free online (Tubi, Vudu & PopcornFlix) & rent or buy from $1.99 on 5 services (iTunes, Google Play & 3 others).