I put these spacebornes aliens into 3 categories:
- Low Tier ships
- Mid Tier ships
- High Tier ships

Low Tier ships:
Low tier ships are ships that you can get quite early. There ships are cheaper and build faster than vanilla ships. However these ships are mostly corvette and destroyer-classes and provide less weaponry than vanilla counterpart, thus they are weak compare to vanilla ships. These are meant to swarm the enemy with numbers.

Space Amoeba:
These solitary space creatures appear surrounded by several flagella that act as disjointed limbs, periodically re-connecting to the host body to be re-programmed. It consist of 2 types - Big Space Amoeba (Cruiser-class) and Small Space Amoeba (Corvette-class).

They have 4 types of colour you can choose - Blue Variant, Yellow Variant, Orange Variant and Zebra Variant

- You can obtain these ships by research it's own tech - Amoeba Breeding Program

Crystalline Entities:
Large, space-borne, semi-sentient, hostile crystals of yellow, red, green, or blue colors. It consist of 3 types - Quintessences (Big, Cruiser-class), Shard (Medium, Destroyer-class) and Shardling (Small, Corvette-class).

They have 4 types of colour you can choose - Sapphire Type, Emerald Type, Topaz Type and Ruby Type

- You can obtain these ships by research it's own tech - Crystal-Infused Plating

In addition to that, their station, crystal nidus, is added into the game. It have 5 defense points, it require Crystal-Argmented Plating research.

Ancient Mining Drones:
Ancient mining drones operate in pairs of one fleet and one station. Mineral and energy-rich systems may have quite a few of these stations. It consist of 3 types - Drone Destroyer (Big, Destroyer-class), Drone Coevette and Drone Miner (Both are small, Coevette-class).

They have 3 types of colour you can choose - Ancient Empire, Machine Conscious (require AI ship research) and Cybrex (require AI ship research).

- You can obtain these ships by research it's own tech - Mining Drone Laser

Void Cloud:
These wisp-like beings possess a hostile attitude and will engage aggressively. Void Cloud only have 1 type (Medium, Destroyer-class) and only 1 colour.

- You can obtain this ship by research it's own tech - Cloud Lightning Conduits

Space Whale Tiyanki:
These passive creatures migrate in groups of three between star systems, grazing upon the local gas giants that they find. Even when provoked, they are unlikely to attack anyone they encounter, primarily gas giant stations will suffer their wrath. Tiyanki only have 1 type - Medium, Destroyer-class.

They have 4 colour you can choose, which corresponding to cow - Space Bull, Space Cow, Space Calf and Space Matriarch.

- You can obtain this ship by research it's own tech - Frequency Tuning

Medium Tier ships:
Medium tier ships are ships that you can get in mid-stage. While they are expensive than low tier spaceborne ships, they are still cheaper and build faster than vanilla ships, although they still provide less weaponry than vanilla counterpart.

Privateers / Pirates:

"Hey you! Yes you! Do you have problem with any space threat that can't solve because of lack of resources? Then you are in luck, Piratical Industries Laboratory is offering you a chance to obtain some easy making pirate ships to help with your empire. Call 274-pirates to purchase!"

A conglomeration of various races from the galactic past, the Privateers subsist entirely on piracy and have no interest in civil discourse. Nowadays they seem interested to start their own service to the empire who wants their help.

Once researched "Piratical Industries Laboratory Channel" tech, you can construct pirates ships of your own. It consist of 3 types - Riders (Corvette-class), Frigate (Destroyer-class) and Cruiser (Cruiser-class). It also allows you to construct Pirate Outpost, which is even cheaper than standard outpost but at a cost of even lower firepower than it. It cost 1 defense point.

After that you can have another tier of research - Galleon Recuitment, which allows you to "call in" Galleon to your services.

Piratical Industries Laboratory Channel is available when you unlock destroyer ship type. It's in society section and it's common type. Galleon Recuitement require Piratical Industries Laboratory Channel and Cruiser Tech to unlock.

Nomads:
The Nomads, or Namarians as they call themselves, are a passive millennia old intergalactic race with no homeworld, forever traveling the void in their starships.

Once researched "Migrant Fleet" tech, you can construct nomad ships of your own. It consist of 3 types - Nomad Destroyer, Nomad Cruiser and Nomad Battleship (Larger version of destroyer).

After that you can have another tier of research - Enclave Blueprints, which allows you to constrct enclave station.

Migrant Fleet is available when you unlock destroyer ship type. It's in society section and it's common type. Enclave Blueprints require Migrant Fleet and Cruiser Tech to unlock.

High Tier ships:
High tier ships are ships that you can get quite in late-stage. These ships are generally crisis type ship you've seen in the later stage of the game. They are not as powerful as their original counterpart, but seems gives you an opportunity to have them in your own arsenal, which can booster the fleet strength.

The tech to acquire them are available once you've researched Battleship Tech. All of them are rare engineering tech.

Fallen Empire Ships:
Large, ancient, and extremely powerful empires that became stagnant over the ages. Unlike normal empires, a Fallen Empire is fully developed at the start of the game, but will not expand further (under normal circumstances), trade, or make any agreements with other empires. In the player's Contact list, they are listed under their own section ("Fallen Empires").

Once finish Fallen Empire Ships tech, you'll gain access to fallen empire ships and stations in you empire. These are:
- Escort (Destroyer-class)
- Battlecruiser (Battleship-class)
- Titan (Titan-class, require titan assembly yard)
- Outpost (Cost 8 defense points)
- Fortress (Caost 2 defense points)

These ships and stations have various colours that you can choose based in what I've obtained throughout the whole games and mods I've seen:
- Materialist
- Spiritualist
- Xenophile
- Xenophobe
- Machine Empire
- Militarist (From New Ship Classes and More) https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=683230077
- Pacifist (From New Ship Classes and More)
- Brunai Imperium (From Brunai Imperium Fallen Empire Ship Types) https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=933940109
- Erebus Empire (From Erebus Empire Fallen Empire Ship Types) https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=883680271
- Blue Fallen Empire (From Blue Fallen Empire Ships) https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=874297483
- Golden Fallen Empire (From Golden Fallen Empire Ships) https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=872794696

AI Ships:

<<CONTINGENCY PROTOCOL NOW IN EFFECT>>

Once finish AI Ships tech, you'll gain access to AI ships and stations in you empire. These are:
- Seeker (Destroyer-class)
- Warform (Battleship-class)
- Defensive (Equivalent to Outpost, cost 2 defense points)
- Nexus (Equivalent to Fortress, cost 4 defense points)

These ships and stations have various colours that you can choose:
- Machine Conscious
- Cybrex
- Ancient Empire (require Mining Drone Laser tech)

Swarm Ships:

MUGANI? HAK HAK HAK! 

Once finish Swarm Ships tech, you'll gain access to Swarm ships and stations in you empire. These are:
- Swarmling (Destroyer-class)
- Warrior (Battleship-class)
- Queen (Battleship-class)
- Star Nest (Equivalent to Outpost, cost 2 defense points)
- Star Hive (Equivalent to Fortress, cost 4 defense points)

Currently there's only 1 colour for swarm - Prethoryn Swarm

Extradimentional Ships:

...feeding ground reached...prey bountiful...at long last...we shall feast

Once finish Extradimensional Ships tech, you'll gain access to extradimensional ships and stations in you empire. These are:
- Escort (Destroyer-class)
- Cruiser (Battleship-class)
- Battleship (Battleship-class)
- Conduit (Equivalent to Outpost, cost 2 defense points)
- Junction (Equivalent to Fortress, cost 4 defense points)

These ships and stations have various colours that you can choose:
- Blue - Unbidden
- Orange - Aberrant
- Green - Vehement
- Sun - Stellarite (Because stellarite use the same texture as extradimensional ships, I put it in here)