source-lm vs CoursifyYT

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

source-lm compared with CoursifyYT
Detail	source-lm	CoursifyYT
What it does	Chrome extension to bulk-add sources to NotebookLM from JSON exports, YouTube, and web pages	Turn any YouTube channel into a structured course with AI-powered study tools
Stage	Not given	Not given
Founded	Not given	Not given
Based in	ES	IN
Pricing model	Paid	Freemium
Pricing	Free plan: 5 bulk actions per month, single sources always free. Pro licence: $29 one time, unlimited bulk runs.	Free: 3 courses per week, 1,000 videos each, 2 quizzes/mind maps/flashcards per day, unlimited notes/clips/screenshots/transcripts. CoursifyYT Pro: $18/month (or $40 at launch, 55% off), includes 6 courses per week, 5,000 videos per channel, 10 quizzes/mind maps/flashcards per day, 500 MB synced sto
Key features	Split JSON exports into Markdown files with 400,000-word budget Filter sources, detect duplicates, and batch delete Incremental uploads skip already-added content No account or login required Source-available code published unminified No data written to disk or stored on servers Supports Telegram Desktop and Telegram for macOS exports	AI-powered course organization that groups videos by discipline, module and lesson from beginner to advanced Notes pinned to specific video timestamps with tags and linked ideas Multiple-choice quizzes built from video content Flashcards with spaced repetition across entire courses Mind maps showing video content as branching ideas Ask feature to get timestamped answers about video content Video transcripts with search and export capabilities Clips and screenshots with timestamps for saving key moments Course syllabus exportable as printable PDF with progress tracking Progress tracking and synced notes across devices when signed in
What makes it different	No backend or recurring costs: pay once, keep the licence forever Runs entirely in your browser with no account or login needed Smart splitting keeps records whole and avoids duplicates on re-runs Source-available and unminified so you can audit the code yourself Extends NotebookLM's interface with bulk operations and source management tools	Works without an account while keeping notes and progress in your browser locally No analytics, advertising or data tracking, with privacy by default Unlimited notes, transcripts and study tools on free plan Course ordering follows learning progression, not YouTube's recommendation algorithm
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)	15 −1 (down) since last check	1 no change since last check
Trust Flow (Majestic)	18	0
Citation Flow (Majestic)	15	18
Referring domains (Majestic)	24	11

6 details filled in for both companies.

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