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source-lm vs Tab Lifeboat

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 Tab Lifeboat
Detailsource-lm logo source-lmTab Lifeboat logo Tab Lifeboat
What it doesChrome extension to bulk-add sources to NotebookLM from JSON exports, YouTube, and web pages Automatic tab backups stored outside your browser
StageNot given Not given
FoundedNot given Not given
Based inES SK
Pricing modelPaid Freemium
PricingFree plan: 5 bulk actions per month, single sources always free. Pro licence: $29 one time, unlimited bulk runs. Free: €0 forever. Pro lifetime: €14.99 one-time payment, including VAT.
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
  • Automatic snapshots within a minute of every change
  • Backup file stored outside browser profile in Downloads folder
  • Calendar search across snapshot history
  • Restore sessions, windows, groups and individual tabs
  • Delete specific pages, days or entire history
  • Incognito windows never saved
  • Import backup files from other installations or computers
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
  • One-time lifetime price with all future Pro features included free
  • Works across Chrome, Edge, Brave, Opera and Vivaldi from single installation
  • Automatic cloud backup to your own storage with encryption only you control
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 checkNot checked yet no change since last check
Trust Flow (Majestic)180
Citation Flow (Majestic)150
Referring domains (Majestic)240

6 details filled in for both companies.

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