ChessAtlas vs Pinsider Arcade

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

ChessAtlas compared with Pinsider Arcade
Detail	ChessAtlas	Pinsider Arcade
What it does	Free chess opening trainer with spaced repetition	Free Disney Pinnacle pin games with daily and weekly leaderboards
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Freemium	Free
Pricing	Not given	Not given
Key features	Spaced repetition with FSRS algorithm Repertoire builder Opening trainer with instant feedback Game import from Lichess and Chess.com Deviation detection Course library with opening courses iOS and Android mobile apps Multiple language support	Daily and weekly leaderboards to track player rankings Arcade XP system for signed-in players
What makes it different	FSRS algorithm schedules reviews 15-30% more efficiently than SM2 Automatic deviation detection from Lichess and Chess.com games Full repertoire builder in free tier with no course purchase required	No pins or wallet required to play most games Same board for everyone with new games daily at midnight PT Independent fan-made games not affiliated with Disney or Dapper Labs
Free plan	Not given	Not given
Open source	Not given	Not given
Platforms	Not given	Not given
Public API	Not given	Not given
Community votes	0	0
DR (Domain Rating by Ahrefs)	17 +1 (up) since last check	6 no change since last check
Trust Flow (Majestic)	22	0
Citation Flow (Majestic)	24	12
Referring domains (Majestic)	34	1

4 details filled in for both companies.