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source-lm vs SurfPal

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 SurfPal
Detailsource-lm logo source-lmSurfPal logo SurfPal
What it doesChrome extension to bulk-add sources to NotebookLM from JSON exports, YouTube, and web pages Website blocker and time tracker for Chrome and Edge browsers
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. 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
  • Focus plans with block by schedule and time limit options
  • Cloud backup to Google Drive
  • Intent check confirmation before accessing blocked sites
  • Per-visit time limits and daily duration restrictions
  • Data export in CSV format
  • Domain hierarchy tracking with subdomain organization
  • Excluded sites list to allow access to specific subdomains
  • Strictness level control for plan enforcement
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
  • Automatic tracking of browsing time at domain granularity level
  • Flexible blocking rules combining schedule-based and duration-based restrictions
  • Intent check mechanism to interrupt automatic browsing habits
  • Cross-device data synchronization via Google Drive
  • Low-power architecture with high performance
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 check3 no change since last check
Trust Flow (Majestic)188
Citation Flow (Majestic)1521
Referring domains (Majestic)2418

4 details filled in for both companies.

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