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source-lm vs DualTrans

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 DualTrans
Detailsource-lm logo source-lm DualTrans
What it doesChrome extension to bulk-add sources to NotebookLM from JSON exports, YouTube, and web pages Immersive bilingual web translation and YouTube dual subtitles powered by DeepSeek, Claude, and Gemini
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. Free plan: $0 forever with built-in Google and Edge translation engines and custom API key support. Pro plan: $2.99 USD per month or $24.99 USD per year (Save 33% with annual billing), includes official Cloud AI models (DeepSeek V3, Claude 3.5, Gemini 1.5), 10,000,000 AI tokens per month, YouTube du
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
  • Immersive bilingual alignment with zero layout breakage
  • YouTube and video dual subtitles with synchronized real-time display
  • Instant selection lookup with floating quick-action ball
  • Six translation display styles (None, Dotted Underline, Marker, Quote Block, Subtle, Hover Learn)
  • Support for DeepSeek, Gemini, Claude, and OpenAI AI models
  • Bring Your Own Key (BYO-Key) with local privacy
  • Support for custom API endpoints and local Ollama models
  • Access to Google Translate and Microsoft Edge Neural Translate
  • Seamless cloud member synchronization across devices
  • 7-day money-back guarantee
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
  • Preserves 100% of webpage structure and code without layout breakage
  • Native dual-line synchronized subtitles for YouTube videos
  • Absolute local privacy with client-side encryption of API keys and browsing data
  • Powered by cutting-edge LLMs with deep contextual understanding
  • Zero-config Pro Cloud AI with no overseas API key registration required
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 check20 no change since last check
Trust Flow (Majestic)185
Citation Flow (Majestic)1518
Referring domains (Majestic)248

5 details filled in for both companies.

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