AI Tool Comparison
Explainpaper vs Perplexity Comet
A side-by-side breakdown to help you pick the right tool for your workflow.
Explainpaper
Highlight confusing text in an academic PDF and get an instant, plain-language AI explanation, turning dense papers into a guided, conversational read.
Perplexity Comet
Browse with an AI-powered browser that summarizes pages, shops on your behalf, and answers questions through an agentic assistant built into browsing. Opened to everyone free since October 2025.
Bottom Line
Last reviewed: August 2026
Explainpaper and Perplexity Comet both compete in Research, overlapping most directly on research. Both carry the same 4.5 rating, so the decision comes down to fit, not quality.
Choose Explainpaper if…
Best for students and non-specialists who need a confusing passage in an academic paper explained in plain language, and its edge is highlight any passage in an uploaded PDF and get an immediate explanation of the technical terms and math. Incredibly simple and effective for individual papers, SciSpace goes further for serious literature review work.
Choose Perplexity Comet if…
Best for researchers who want an AI browser that can navigate and extract information across multiple sites, not just answer a query, and its edge is completes multi-step browser tasks directly, filling forms and pulling information without you doing the clicking. A genuinely capable research agent that's still maturing, its best features sit behind the Pro plan.
| Attribute | Explainpaper | Perplexity Comet |
|---|---|---|
| Category | Research | Research |
| Pricing | freemium | freemium |
| Pricing Detail | Free (unlimited explanations) / $16/mo Pro | Free / $5/mo Comet Plus (bundled with Perplexity Pro) |
| Rating |
Key Features
Explainpaper
- Highlight-to-explain interface
- Technical jargon breakdown
- Follow-up questions
- Paper library
- Multiple paper models
Perplexity Comet
- Built-in AI assistant
- Cited answers and summaries
- Tab and task automation
- Context-aware browsing
Pros
Explainpaper
- •Incredibly simple interaction model
- •Great for students and non-experts
- •Works well on math-heavy papers
- •Fast explanations
Perplexity Comet
- •Research without leaving the page
- •Strong citations
- •Agentic task support
Cons
Explainpaper
- Limited to individual papers
- Less powerful than SciSpace overall
- Free plan has usage limits
Perplexity Comet
- Newer, still maturing
- Best features behind Pro