The Best Alien Movies on Free Services

What it's about: During its return to the earth, commercial spaceship Nostromo intercepts a distress signal from a distant planet. When a three-member team of the crew discovers a chamber containing thousands of eggs on the planet, a creature inside one of the eggs attacks an explorer. The entire crew is unaware of the impending nightmare set to descend upon them when the alien parasite planted inside its unfortunate host is birthed.

Where to Watch: Available to watch free online (Sony Crackle) & rent or buy from $2.99 on 8 services (iTunes, Google Play & 6 others).

What it's about: A man struggles with memories of his past, including a wife he cannot remember, in a nightmarish world with no sun and run by beings with telekinetic powers who seek the souls of humans.

Where to Watch: Available to watch free online (Vudu) & rent or buy from $2.99 on 7 services (iTunes, Google Play & 5 others).

What it's about: Corky St. Clair is a director, actor and dancer in Blaine, Missouri. When it comes time to celebrate Blaine's 150th anniversary, Corky resolves to bring down the house in Broadway style.

Where to Watch: Available to watch free online (Vudu) & rent or buy from $2.99 on 7 services (iTunes, Google Play & 5 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 (IMDb TV) & rent or buy from $2.99 on 7 services (iTunes, Google Play & 5 others).

What it's about: When an alien takes the form of a young widow's husband and asks her to drive him from Wisconsin to Arizona, the government tries to stop them.

Where to Watch: Available to watch free online (Sony Crackle) & rent or buy from $2.99 on 7 services (iTunes, Google Play & 5 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 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 (PopcornFlix & Tubi TV), stream on a popular subscription service (Prime Video) & rent or buy from $0.99 on 1 service (Prime Video).

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 TV) & rent or buy from $2.99 on 7 services (iTunes, Google Play & 5 others).

What it's about: Aliens who look like clowns come from outer space and terrorize a small town.

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

What it's about: When their plans for a nature trip go awry, Polly and boyfriend Seth decide to check into a motel. On their way, they're carjacked and kidnapped by low-rent crooks Dennis and Lacey, who take the victims and their SUV to a nearby gas station. Along the way, they encounter an increasingly terrifying horde of parasites, and if any of them intend to survive, they'll have to outsmart the deadly organisms.

Where to Watch: Available to watch free online (Tubi TV & Vudu) & rent or buy from $2.99 on 7 services (iTunes, Google Play & 5 others).

What it's about: A comedy that follows the chaos that ensues when a meteor hits the Earth carrying alien life forms that give new meaning to the term "survival of the fittest." David Duchovny, Orlando Jones, Seann William Scott, and Julianne Moore are the only people standing between the aliens and world domination... which could be bad news for the Earth.

Where to Watch: Available to watch free online (Sony Crackle, PopcornFlix, Tubi TV & 1 other), stream on a popular subscription service (Netflix & Prime Video), stream on a popular TV everywhere service (Epix) & rent or buy from $2.99 on 8 services (iTunes, Google Play & 6 others).

What it's about: Remake of the 1958 horror sci-fi about a deadly blob which is the spawn of a secret government germ warfare project which consumes everyone in its path. Teenagers try in vain to warn the townsfolk, who refuse to take them seriously, while government agents try to cover up the evidence and confine the creature.

Where to Watch: Available to watch free online (Sony Crackle) & rent or buy from $2.99 on 6 services (iTunes, Google Play & 4 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 TV & Vudu), stream on a popular TV everywhere service (Epix) & rent or buy from $1.99 on 7 services (iTunes, Google Play & 5 others).

What it's about: The residents of a small town are excited when a flaming meteor lands in the hills, but their joy is short-lived when they discover it has passengers who are not very friendly.

Where to Watch: Available to watch free online (PopcornFlix), stream on a subscription service (The Criterion Channel & Kanopy) & rent or buy from $2.99 on 7 services (iTunes, Google Play & 5 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 TV) & rent or buy from $2.99 on 6 services (iTunes, Google Play & 4 others).

What it's about: A shower of meteorites produces a rare night time spectacle that blinds anyone that looks at it. As it was such a beautiful sight, most people were watching, and as a consequence, 99% of the World's population go completely blind. In the original novel, this chaos results in the escape of Triffids: farmed plants harvested for their oils, which are capable of moving themselves around and are carnivorous. In this film version, however, the Triffids are not indigenous plants. Instead they are space aliens whose spores have arrived in this and an earlier meteor shower. Derided by the original novel's author, John Wyndham, for straying so far away from the source material.

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

What it's about: Humouristic reconstruction of the 1995 scandal when two British lads were accused of having faked a documentary from the Roswell incident in 1947.

Where to Watch: Available to watch free online (Vudu) & rent or buy from $2.99 on 6 services (iTunes, Google Play & 4 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 (Sony Crackle) & rent or buy from $2.99 on 8 services (iTunes, Google Play & 6 others).

What it's about: It's the end of yet another night at Hastings Supermarket, a grocery store in Buck Lake, Arizona. But just before closing, a group of masked and armed to the teeth militants invades the store and take everyone hostage

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

What it's about: Mysterious and unearthly deaths start to occur while Professor Saxton is transporting the frozen remains of a primitive humanoid creature he found in Manchuria back to Europe.

Where to Watch: Available to watch free online (PopcornFlix & Tubi TV), stream on a popular subscription service (Prime Video, Fandor, ConTV & 2 others) & rent or buy from $1.99 on 3 services (iTunes, Google Play & Microsoft).

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 TV), stream on a subscription service (CBS All Access & Tribeca Short List), stream on a popular TV everywhere service (Epix) & rent or buy from $1.99 on 8 services (iTunes, Google Play & 6 others).

What it's about: 18th century justice catches up with a pair of grave robbers. With only a few hours to go before his date with the guillotine, Arthur Blake (Monaghan) tells his life story to Father Francis Duffy (Ron Perlman). Before long, Arthur spills the beans on how he got started in the grim corpse peddling business with seasoned ghoul Willie Grimes.

Where to Watch: Available to watch free online (PopcornFlix) & rent or buy from $3.99 on 1 service (iTunes).

What it's about: Astronaut Scorch Supernova finds himself caught in a trap when he responds to an SOS from a notoriously dangerous alien planet.

Where to Watch: Available to watch free online (Vudu), stream on a TV everywhere service (Freeform) & rent or buy from $1.99 on 6 services (iTunes, Prime Video & 4 others).

What it's about: A mysterious young woman materializes in the middle of the southwestern desert, where each step teaches her about her new world and her new body. As she assumes her new life, she discovers she has a twin with whom she shares more than just an outward appearance.

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

What it's about: An ancient intergalactic warrior arrives on Earth to put a stop to a demonic child's plot to reproduce Satan's next generation of evil.

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

What it's about: In California, an old man grieves the loss of his wife and on the next day he also dies. However, the space soldier Eros and her mate Tanna use an electric device to resurrect them both and the strong Inspector Clay that was murdered by the couple. Their intention is not to conquest Earth but to stop mankind from developing the powerful bomb “Solobonite” that would threaten the universe. When the population of Hollywood and Washington DC sees flying saucers on the sky, a colonel, a police lieutenant, a commercial pilot, his wife and a policeman try to stop the aliens.

Where to Watch: Available to watch free online (PopcornFlix, SnagFilms & Tubi TV), stream on a popular subscription service (Prime Video, Fandor, FilmBox & 2 others) & rent or buy from $2.00 on 6 services (iTunes, Google Play & 4 others).

What it's about: Eccentric aliens give a man the power to do anything he wants to determine if Earth is worth saving.

Where to Watch: Available to watch free online (Vudu), stream on a popular subscription service (Prime Video) & rent or buy from $2.99 on 8 services (iTunes, Google Play & 6 others).

What it's about: A prince and a fellowship of companions set out to rescue his bride from a fortress of alien invaders who have arrived on their home planet.

Where to Watch: Available to watch free online (Sony Crackle) & rent or buy from $2.99 on 8 services (iTunes, Google Play & 6 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 TV & Vudu), stream on a popular subscription service (Prime Video) & rent or buy from $2.99 on 5 services (iTunes, Google Play & 3 others).

What it's about: On a deep space mining mission to a remote planet, an ancient religious relic - thought to be proof of the existence of God - is unearthed and brought aboard. When the unholy artifact unleashes a long-dormant alien race, its glimpse of Heaven transforms the ship into a living Hell. A prequel to the events of the 2008 video game Dead Space.

Where to Watch: Available to watch free online (Tubi TV), stream on a popular subscription service (Prime Video) & rent or buy from $1.99 on 5 services (iTunes, Prime Video & 3 others).

What it's about: In this attempted remake of the classic 50s SF tale, a boy tries to stop an invasion of his town by aliens who take over the the minds of his parents, his least-liked schoolteacher and other townspeople. With the aid of the school nurse the boy enlists the aid of the U.S. Marines.

Where to Watch: Available to watch free online (Tubi TV), stream on a popular subscription service (Starz), stream on a popular TV everywhere service (Starz & Epix) & rent or buy from $3.99 on 2 services (iTunes & Prime Video).

What it's about: When astronaut Spencer Armacost returns to Earth after a mission that nearly cost him his life, he decides to take a desk job in order to see his beautiful wife, Jillian, more often. Gradually, Jillian notices that Spencer's personality seems to have changed, but her concerns fade when she discovers that she's pregnant. As Jillian grows closer to becoming a mother, her suspicions about Spencer return. Why does it seem as if he's a different person?

Where to Watch: Available to watch free online (Vudu) & rent or buy from $2.99 on 7 services (iTunes, Google Play & 5 others).

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 TV), stream on a popular subscription service (Prime Video & Kanopy) & rent or buy from $3.99 on 1 service (Prime Video).

What it's about: Sean Barker became the unwilling host to an alien bio-armor known as the Guyver. A year ago he destroyed the Kronos Corporation, an organization of mutants who want the Guyver. Now he is trying to find why the Guyver unit forces him to fight and kill evil.

Where to Watch: Available to watch free online (Vudu) & rent or buy from $2.99 on 4 services (iTunes, Prime Video & 2 others).

What it's about: Trying to rescue her home planet from destruction, a gorgeous extraterrestrial named Celeste arrives on Earth and begins her scientific research. She woos quirky scientist Dr. Steve Mills, a widower with a young daughter. Before long, Celeste finds herself in love with Steve and her new life on Earth, where she experiences true intimacy for the first time. But when she loses sight of her mission, she begins to question where she belongs.

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

What it's about: In the year 2025, the ozone layer is believed to have been destroyed. It is up to MacLeod and Rameriz to set things right. Opposition comes from both the planet Ziest (MacLeod and Ramirez's homeworld) and a corporation profiting from the supposed lack of ozone. Also, flashbacks show the story behind MacLeod and Ramirez's exile from Ziest.

Where to Watch: Available to watch free online (Vudu).

What it's about: A group of hikers lost on the Appalachian Trail stumble across an ancient secret that threatens their survival.

Where to Watch: Available to watch free online (Tubi TV & Vudu), stream on a popular subscription service (Prime Video) & rent or buy from $2.99 on 5 services (iTunes, Google Play & 3 others).

What it's about: Godzilla saves Tokyo from a flying saucer that transforms into the beast Orga.

Where to Watch: Available to watch free online (Sony Crackle) & rent or buy from $2.99 on 8 services (iTunes, Google Play & 6 others).

What it's about: Three women makes an emergency landing on a planet plagued with a fatal disease, but are captured by dictator Overdog. Adventurer Wolff goes there to rescue them and meets Niki, the only Earthling left from a medical expedition. Combining their talents, they try to rescue the women.

Where to Watch: Available to watch free online (IMDb TV) & rent or buy from $2.99 on 7 services (iTunes, Google Play & 5 others).

What it's about: In the year 2044 AD, the human race has amped-up its space exploration and reached out to the stars through the miracle of ROBOTECHNOLOGY, but not without bringing intergalactic war upon the Earth itself. Heroes will die and allegiances will shift. But in the midst of combat, perhaps peace will spring up through the charred remains of battered history. One of the greatest science fiction sagas of all time continues...

Where to Watch: Available to watch free online (Tubi TV & Vudu), stream on a popular subscription service (Prime Video & Ameba) & rent or buy from $1.99 on 1 service (Prime Video).

What it's about: Seven teens head up to a cabin on the lake for spring break. Mike has studied all horror films on video, and recognizes the signs of foreshadowing of doom. The others dismiss his concerns as the workings of a person that watches too many videos, but there really is something out there, and the teens begin experiencing an attrition problem when they start stumbling into all the cliches found in a typical teen horror film.

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

What it's about: Neil Agar, a security agent with the State Department, is dispatched to Peckham, California to investigate the death of a bacteriologist working at government-sponsored Brandt Research. His investigation is soon complicated by a growing number of deaths, all men who died of congestive heart failure caused by sexual exhaustion.

Where to Watch: Available to watch free online (Tubi TV), stream on a popular subscription service (Prime Video & Full Moon), stream on a popular TV everywhere service (Epix) & rent or buy from $3.99 on 1 service (Prime Video).

What it's about: A highly-evolved planet, whose denizens feel no emotion and reproduce by cloning, plans to take over Earth from the inside by sending an operative, fashioned with a humming, mechanical penis, to impregnate an earthling and stay until the birth. The alien, Harold Anderson, goes to Phoenix as a banker and sets to work finding a mate. His approaches to women are inept, and the humming phallus doesn't help, but on the advice of a banking colleague, he cruises an AA meeting, meets Susan, and somehow convinces her to marry. The clock starts to tick: will she conceive, have a baby, and lose Harold (and the child) to his planet before he discovers emotion and starts to care?

Where to Watch: Available to watch free online (Sony Crackle) & rent or buy from $2.99 on 7 services (iTunes, Google Play & 5 others).

What it's about: Capable of making bio-mechanical weapons out of human flesh, alien parasites grotesquely invade the Earth, turning their hosts into maniacal killers who seek and destroy each other to the bloody death! And yes, it s also a human love story, even though the budding romantics are infested with slimy, tumor-like globules.

Where to Watch: Available to watch free online (Tubi TV), stream on a popular subscription service (Prime Video) & rent or buy from $3.99 on 3 services (iTunes, Google Play & Prime Video).

What it's about: A new space race is born between NASA and the ESA when Charlie Brownsville, Hank Morrison, and Dr. Casey Cook compete against an artificially intelligent robot to find out what's up there on the red planet. 'Mars' follows these three astronauts on the first manned mission to our galactic neighbor. On the way they experience life threatening accidents, self doubts, obnoxious reporters, and the boredom of extended space travel.

Where to Watch: Available to watch free online (Tubi TV & Vudu), stream on a subscription service (Fandor & Kanopy) & rent or buy from $0.99 on 3 services (iTunes, Google Play & Vudu).

What it's about: Documentary based on the book by Erich Von Daniken concerning the ancient mysteries of the world, such as the pyramids of Egypt and Mexico, ancient cave drawings, the monuments of Easter Island, etc. and the fact that these things and modern civilization could have been influenced by extra-terrestrial visitations hundreds(or perhaps thousands) of years ago.

Where to Watch: Available to watch free online (PopcornFlix), stream on a subscription service (Fandor & Gaia) & rent or buy from $4.99 on 1 service (Prime Video).

What it's about: 6th Grade gets a new substitute teacher. She wants to train the class for an international competition in Paris. But something isn't right. How is she able read kids' minds? Why is she so mean? And how does she manage to convince everyone's parents she is so great when the whole class knows she is really an alien?

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

What it's about: A captain and his crew travel across the universe in a ship that can travel for 20 years while the crew will age only 1 year. Soon the crew realizes that a criminal is onboard who is hoping to escape civilization. The crew must find who the criminal is, and find the source of a deadly virus that is destroying them one by one

Where to Watch: Available to watch free online (Tubi TV & Vudu), stream on a popular subscription service (Prime Video) & rent or buy from $1.99 on 1 service (Prime Video).

What it's about: 450,000 years ago our ancestors descended from the heavens to engineer the first human beings. To us they were Giants that ruled as Gods over mankind. Now new evidence and scientific research acknowledges their existence on earth but reveals when they will return. The truth of their real origin and purpose is much more bizarre and amazing than anything previously believed. From the Garden of Eden to the Great Flood; from the God of the Bible to the secrets of Enoch all shall be revealed. (IMDB)

Where to Watch: Available to watch free online (Tubi TV), stream on a popular subscription service (Prime Video & ConTV) & rent or buy from $2.99 on 5 services (iTunes, Google Play & 3 others).