source-lm vs Crumbongo

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 Crumbongo
Detail	source-lm	Crumbongo
What it does	Chrome extension to bulk-add sources to NotebookLM from JSON exports, YouTube, and web pages	Browse. Harvest. Play.
Stage	Not given	Not given
Founded	Not given	Not given
Based in	ES	Not given
Pricing model	Paid	Free
Pricing	Free plan: 5 bulk actions per month, single sources always free. Pro licence: $29 one time, unlimited bulk runs.	Not given
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	Harvest accessible cookies from websites you authorize Customize Bongo with pixel-art cosmetics Play Monkey Climb minigame Play Cookie Stack minigame Unlock habitats and companions Local-only data storage No analytics or tracking
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	Privacy-first design with no data transmission All gameplay data stays local in your browser Transforms everyday browsing into an engaging game Never modifies or deletes browser cookies
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	Not checked yet no change since last check
Trust Flow (Majestic)	18	7
Citation Flow (Majestic)	15	19
Referring domains (Majestic)	24	7

4 details filled in for both companies.

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