Games like Canto I
Games like Canto I include Celeste, Super Meat Boy, SANABI, Jump King, and VVVVVV. We matched them by the tags players give Canto I on Steam (Precision Platformer, Pixel Graphics, Action, Difficult, and 2D Platformer): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Precision Platformer · Pixel Graphics · Difficult

Super Meat Boy
Shared: Precision Platformer · Difficult · Pixel Graphics

SANABI
Shared: Pixel Graphics · Action · 2D Platformer

Jump King
Shared: Precision Platformer · Difficult · Pixel Graphics

VVVVVV
Shared: Precision Platformer · Pixel Graphics · Platformer

Pizza Tower
Shared: 2D Platformer · Pixel Graphics · Platformer

Downwell
Shared: Precision Platformer · Pixel Graphics · Platformer

Shovel Knight: Treasure Trove
Shared: Pixel Graphics · Platformer · Action

Katana ZERO
Shared: Pixel Graphics · Action · Platformer

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

Skul: The Hero Slayer
Shared: Action · Pixel Graphics · Platformer

I wanna be the Creator
Shared: Action · Platformer · Precision Platformer

Geometry Dash
Shared: Difficult · Precision Platformer · Platformer

Blasphemous 2
Shared: Difficult · Pixel Graphics · Adventure

Rain World
Shared: Difficult · Pixel Graphics · Platformer

Hollow Knight
Shared: Difficult · Platformer · Adventure

The Messenger
Shared: Pixel Graphics · Platformer · Action

Brawlhalla
Shared: Free to Play · 2D Platformer · Platformer

Rusted Moss
Shared: Pixel Graphics · Action · Platformer

Bread & Fred
Shared: Pixel Graphics · Precision Platformer · 2D Platformer

Ambidextro
Shared: Precision Platformer · Action · Pixel Graphics

Broforce
Shared: Pixel Graphics · Action · Platformer

Smilemo
Shared: Action · Pixel Graphics · Platformer

Titan Souls
Shared: Pixel Graphics · Difficult · Action