Games like Ari's Journey
Games like Ari's Journey include Celeste, SANABI, Super Meat Boy, Hollow Knight, and Hollow Knight: Silksong. We matched them by the tags players give Ari's Journey on Steam (Precision Platformer, Difficult, Story Rich, 2D Platformer, and Top-Down): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Precision Platformer · Difficult · 2D Platformer

SANABI
Shared: Story Rich · 2D Platformer · Action

Super Meat Boy
Shared: Precision Platformer · Difficult · Platformer

Hollow Knight
Shared: Difficult · Platformer · Story Rich

Hollow Knight: Silksong
Shared: Difficult · Platformer · Indie

Jump King
Shared: Difficult · Precision Platformer · Platformer

Geometry Dash
Shared: Difficult · Precision Platformer · Platformer

VVVVVV
Shared: Precision Platformer · 2D Platformer · Platformer

Katana ZERO
Shared: Story Rich · Platformer · 2D Platformer

Nine Sols
Shared: Difficult · Platformer · Story Rich

Ori and the Will of the Wisps
Shared: Platformer · Story Rich · Action

Rain World
Shared: Difficult · Atmospheric · Platformer

Downwell
Shared: Precision Platformer · Platformer · 2D Platformer

The End Is Nigh
Shared: Precision Platformer · Difficult · Platformer

Dungeon Escape
Shared: Precision Platformer · Difficult · 2D Platformer

Super Meat Boy Forever
Shared: Difficult · Precision Platformer · Platformer

Will You Snail?
Shared: Difficult · Precision Platformer · Story Rich

Ambidextro
Shared: Precision Platformer · 2D Platformer · Action

Thomas Was Alone
Shared: Precision Platformer · Platformer · 2D Platformer

Shovel Knight: Treasure Trove
Shared: Platformer · Difficult · Retro

F.I.S.T.: Forged In Shadow Torch
Shared: Platformer · 2D Platformer · Story Rich

Rusted Moss
Shared: Platformer · Story Rich · Precision Platformer

Alex Kidd in Miracle World DX
Shared: Precision Platformer · Difficult · 2D Platformer

Cuphead
Shared: Difficult · Platformer · 2D