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source-lm vs Legibilize

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 Legibilize
Detailsource-lm logo source-lm Legibilize
What it doesChrome extension to bulk-add sources to NotebookLM from JSON exports, YouTube, and web pages Read articles without ads and convert text to audio
StageNot given Not given
FoundedNot given Not given
Based inES Not given
Pricing modelPaid Freemium
PricingFree plan: 5 bulk actions per month, single sources always free. Pro licence: $29 one time, unlimited bulk runs. Monthly: $3.99/mo with unlimited URL clean rendering, full device native audio player, high-priority parsing, and ad-blocking updates. Annual: $35.00/yr with everything in the monthly plan plus infinite processing loops, locked-in pricing protection, and bypass processing queues.
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
  • Remove ads and popups from web pages
  • Convert article text to audio speech
  • Local processing with no external APIs
  • Support for multiple languages
  • Typographic optimization to reduce eye strain
  • Dark mode and light mode themes
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
  • Processes everything locally on your device with zero API latency
  • Data stays on your device, not sent to external servers
  • Free daily cleaning pass for articles
  • Uses native device text-to-speech without third-party APIs
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)15 −1 (down) since last check1 no change since last check
Trust Flow (Majestic)183
Citation Flow (Majestic)156
Referring domains (Majestic)242

5 details filled in for both companies.

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