Games like Frantic Freighter
Games like Frantic Freighter include Elite Dangerous, FTL: Faster Than Light, Barn Finders, Kerbal Space Program, and House of the Dying Sun. We matched them by the tags players give Frantic Freighter on Steam (Indie, Casual, Simulation, Trading, and Futuristic): closest matches first, and among equally close ones the better-known games.

Elite Dangerous
Shared: Simulation · Space · VR

FTL: Faster Than Light
Shared: Indie · Space · Sci-fi

Barn Finders
Shared: Casual · Indie · Simulation

Kerbal Space Program
Shared: Simulation · Space · Indie

House of the Dying Sun
Shared: Simulation · Indie · VR

Hardspace: Shipbreaker
Shared: Simulation · Space · Sci-fi

STAR WARS™: Squadrons
Shared: VR · Space · Simulation

SpaceEngine
Shared: Casual · Space · Sci-fi

Mountain
Shared: Indie · Simulation · Casual

X4: Foundations
Shared: Simulation · Space · Space Sim

Starpoint Gemini 2
Shared: Simulation · Space · Indie

Viscera Cleanup Detail
Shared: Simulation · Indie · First-Person

Angels Fall First
Shared: Indie · Simulation · Space

Game Dev Tycoon
Shared: Indie · Simulation · Casual

Universe Sandbox
Shared: Simulation · Indie · Space

Plague Inc: Evolved
Shared: Simulation · Indie · Casual

Supermarket Simulator
Shared: Simulation · Trading · First-Person

No Man's Sky
Shared: Space · Sci-fi · First-Person

Endless Sky
Shared: Space · Simulation · Sci-fi

Solar 2
Shared: Indie · Casual · Space

Contractors
Shared: VR · Indie · Simulation

ADR1FT
Shared: Indie · VR · Space

Rick and Morty: Virtual Rick-ality
Shared: Indie · VR · Simulation

X Rebirth
Shared: Simulation · Space · Sci-fi