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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.

DeepSeek logo
DeepSeek
✓ verifiedFreemium

Chinese AI lab DeepSeek offering free chat apps and low-cost API access to its frontier V-series and R-series reasoning models.

430M visits/mo
37M visits/mo
Use AI logo
Use AI
Paid
27M visits/mo
NoteGPT logo
NoteGPT
✓ verifiedFreemium

An AI learning assistant that summarizes YouTube videos, PDFs and documents and adds chat and writing tools, with a free tier.

12M visits/mo12K saves
Manus logo
Manus
✓ verifiedFreemium

General-purpose autonomous AI agent that plans and runs multi-step tasks such as building sites, slides and research in the cloud.

28M visits/mo89K saves
Pricing

No public pricing

No public pricing

Monthly subscription: $29.99/monthly
Quarterly subscription: $49.99/3 months

No public pricing

No public pricing

Core features
  • Free DeepSeek chat (web and app)
  • Open API platform
  • V-series and R-series reasoning models
  • DeepSeek-V4 with long context and stronger agent ability
  • OpenAI/Anthropic-compatible API
  • Extensive published model lineup
  • Access to millions of study materials
  • AI-powered summarization of notes
  • Quizzes and Flashcards for practice
  • Community sharing of study resources
  • Access to 25+ LLM models (Multi-LLM Access)
  • Model Selection by Task (research, coding, writing, image generation)
  • Voice-Enabled Commands
  • Unlimited switching between models
  • AI summaries of videos, PDFs and documents
  • YouTube video summarization
  • AI chat over content
  • AI writing assistance
  • Note and takeaway generation
  • Autonomous multi-step task execution
  • Website and app building
  • AI slides, design and image generation
  • Manus browser operator
  • Wide Research mode
  • Cross-platform web, desktop and mobile apps
Use cases
  • Free AI chat and assistance
  • Building apps via API
  • Reasoning and coding tasks
  • Low-cost LLM inference
  • Finding study notes for specific courses
  • Preparing for exams using quizzes and flashcards
  • Sharing personal study materials with other students
  • Organizing and summarizing study notes with AI
  • Accelerating research and complex data analysis
  • Generating code and debugging for developers
  • Creating content, articles, and marketing copy
  • Generating images based on text prompts
  • Summarizing videos and documents for study
  • Chatting with content to learn faster
  • Drafting writing with AI help
  • Automate end-to-end digital tasks
  • Produce websites and presentations
  • Conduct broad research
  • Hand off browser tasks to an agent
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