Explainpaper vs Sourcely: Which AI Tool is Essential for Your Research?
In the rapidly evolving world of AI-driven academia, researchers and students are no longer limited to manual database searches and dense, jargon-heavy reading. Two tools have emerged as frontrunners in streamlining the research process: Explainpaper and Sourcely. While both utilize advanced language models to assist with academic work, they target completely different stages of the research lifecycle.
Explainpaper focuses on the comprehension stage—helping you understand what you are reading—while Sourcely dominates the discovery stage—helping you find the right papers to cite. In this detailed comparison, we break down their features, pricing, and specific use cases to help you decide which belongs in your academic toolkit.
Quick Comparison Table
| Feature | Explainpaper | Sourcely |
|---|---|---|
| Primary Purpose | Reading comprehension and jargon simplification. | Finding academic sources and citations. |
| Core Workflow | Upload PDF → Highlight text → Get explanation. | Paste text/keywords → AI finds sources → Export citations. |
| Database | User-uploaded documents. | 200M+ peer-reviewed academic papers. |
| Best For | Understanding complex papers and dense technical jargon. | Writing literature reviews and finding supporting evidence. |
| Pricing | Free; Pro (~$16/mo). | Free (limited); Pro (~$17/mo or $9/mo annually). |
Overview of Explainpaper
Explainpaper is an AI-powered reading assistant designed to lower the barrier to entry for complex academic literature. The tool allows users to upload a research paper and interact with it directly. If you encounter a confusing sentence, a dense paragraph, or a mathematical formula, you can simply highlight the text to receive a simplified explanation. It essentially acts as a 24/7 tutor that can "translate" high-level academic jargon into plain English, making it an invaluable resource for students and researchers exploring fields outside their primary expertise.
Overview of Sourcely
Sourcely is an AI-driven citation finder and literature discovery tool that reverses the traditional search process. Instead of guessing the right keywords for Google Scholar, you can paste an entire paragraph or a draft of your essay into Sourcely. The AI then analyzes the context and provides a list of relevant, peer-reviewed academic papers that support your claims. It includes built-in filters for publication year and citation count, along with a one-click citation exporter, making it a powerful engine for building bibliographies and finding evidence for academic writing.
Detailed Feature Comparison
The fundamental difference between these two tools lies in their directional workflow. Explainpaper is "top-down": you already have the document, and you need to extract meaning from it. Its features are built around this interaction, offering a chat interface where you can ask follow-up questions about the paper’s methodology or results. Higher-tier plans even offer "Math Explain" features to break down complex equations and the ability to summarize entire papers instantly.
Sourcely, conversely, is "bottom-up": you have an idea or a draft, and you need to find documents to ground it. Its standout feature is its context-aware search. Unlike traditional keyword searches, Sourcely understands the nuances of your writing and can find papers that share the same conceptual framework even if they don't use the exact same terminology. Once sources are found, Sourcely provides summaries and direct PDF links, allowing you to quickly vet a source’s relevance without leaving the platform.
When it comes to interaction, Explainpaper offers a more conversational experience. You are essentially "talking" to the paper. Sourcely is more of a high-efficiency utility; it’s about filtering through a massive database of 200 million papers to find the "needle in the haystack" that proves your thesis. While Explainpaper helps you consume information, Sourcely helps you produce it by automating the tedious task of reference hunting.
Pricing Comparison
- Explainpaper: Offers a robust Free tier that includes unlimited highlight explanations using basic AI models. The Pro tier (approx. $16/month) unlocks advanced models (like GPT-4), the ability to explain math/formulas, full-paper summaries, and Zotero integration.
- Sourcely: The Free version is quite limited, typically restricting searches to 300 characters. The Pro plan (approx. $17/month or $9/month billed annually) provides unlimited searches, access to the full 200M+ paper database, and advanced filters. Sourcely also occasionally offers a "Believer" lifetime or long-term plan for a one-time fee.
Use Case Recommendations
Use Explainpaper if:
- You are a student struggling with the dense language of a required reading.
- You are a researcher reading a paper in a field adjacent to your own and need help with unfamiliar jargon.
- You need to quickly grasp the core findings of a paper without reading every word.
Use Sourcely if:
- You are writing a literature review and need to find dozens of relevant sources quickly.
- You have a draft of an essay and need to find "proof" or citations for your specific arguments.
- You want to automate the formatting of your bibliography in APA, MLA, or Chicago styles.
Verdict: Which One Should You Choose?
The reality is that Explainpaper and Sourcely are complementary tools rather than direct rivals. If you are in the middle of a heavy research project, you will likely find a use for both.
However, if you must choose one: Pick Sourcely if your biggest pain point is finding and citing sources for your writing. It will save you hours of manual searching. Pick Explainpaper if your biggest hurdle is the actual reading process—if you find yourself staring at a PDF and feeling overwhelmed by the technical language. For most undergraduates, Explainpaper is the better "learning" tool, while for graduate students and professional researchers, Sourcely is the superior "productivity" tool.