SparkNotes

Blinkist

blinkist.com

Brilliant

brilliant.org

Seneca

senecalearning.com

Scholarcy

scholarcy.com

Course Hero

coursehero.com

Studyable

studyable.app

Shortform

shortform.com

College Board

collegeboard.org

SciSummary

scisummary.com

Sketchy

sketchy.com

Studypool

studypool.com

Inciteful

inciteful.xyz

SuperSummary

supersummary.com

Sumizeit

sumizeit.com

Booknotes

getbooknotes.com

RevNote

revnote.io

Bartleby

bartleby.com

eNotes

enotes.com

Test English

test-english.com

Shmoop

shmoop.com

Studygenie

studygenie.io

Test Guide

test-guide.com

Thesify

thesify.ai

Sharpen

studysharpen.com