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Side-by-side features, use cases and pricing — because the right pick depends on your job and budget, not just the ranking.

Language REACTOR logo
Language REACTOR
✓ verifiedFreemium

Browser extension that adds dual subtitles and click-to-lookup to Netflix and YouTube for learning languages.

1.7M visits/mo
Talkpal logo
Talkpal
✓ verifiedFreemium

AI language coach offering conversational practice with real-time feedback across 130+ languages.

1.5M visits/mo9.9K saves
gizmo.ai logo
gizmo.ai
✓ verifiedFreemium

AI study app that turns notes, PDFs, YouTube and slides into quizzes and flashcards to help students revise.

5.4M visits/mo10K saves

Free AI-assisted career aptitude quiz that matches personality and skills to suggested tech career paths.

1.6M visits/mo1.9K saves
Semantic Scholar logo
Semantic Scholar
✓ verifiedFree

Free AI-powered academic search engine indexing 236M+ papers, for researchers wanting semantic literature discovery and an augmented reader.

7.9M visits/mo13K saves
Pricing

No public pricing

No public pricing

Free trial available

No public pricing

No public pricing

No public pricing

Core features
  • Dual subtitles on Netflix and YouTube
  • Click-to-lookup word translations
  • Saveable vocabulary items
  • Playback controls for language study
  • Works as a browser extension
  • Conversational practice with AI tutors
  • Real-time personalized feedback and corrections
  • Dialogue, sentence, word, call, photo, and debate modes
  • Voice interaction with natural AI voices
  • Grammar courses and language certificates
  • 130+ languages on web, iOS, and Android
  • AI-generated quizzes
  • Flashcard maker
  • Create flashcards from PDFs, notes and slides
  • YouTube and PowerPoint summarizers
  • Spaced-repetition study
  • Mobile app
  • AI-assisted career matching using validated psychological models
  • Instant results with no account required
  • Personality analysis alongside skill-based career matches
  • Ranked list of best-fit career paths
  • Job role overview summaries for each match
  • AI-powered semantic search across 236M+ papers
  • Semantic Reader for augmented, contextual paper reading
  • Free public API for paper search and metadata
  • Author and topic discovery
  • Citation graph exploration
  • Beta program for new features
Use cases
  • Learn a language while watching shows
  • Look up and save new words from video
  • Study with dual subtitles
  • Self-learners practicing conversational fluency
  • Business teams training employees in new languages
  • Students supplementing classroom language education
  • Revise for school and university exams
  • Turn notes and PDFs into flashcards
  • Study with AI-generated quizzes
  • People considering a career change into tech seeking data-driven direction
  • Students unsure which tech role fits their strengths
  • Job seekers wanting language to explain their strengths to employers or mentors
  • Researchers searching scientific literature across disciplines
  • Developers building applications on top of scholarly data via the API
  • Students exploring citation networks for a topic
  • Librarians and academics needing free literature discovery tools
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