Features
Who it's for

Features

Who it's for

For researchers

A literature review you can verify line by line.

Get sources suggested for your claims, then see which papers support, qualify or contradict each one, with the verbatim passage. Build your literature matrix from linked quotes, close citation gaps and check journal quality before a reviewer does.

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A review article with Andi

Andi Wirawan

Researcher preparing a systematic literature review

Fictional persona.

Andi is a master's student and young researcher at the computer science faculty. He is writing a review of the evidence on learning analytics dashboards for a Scopus-indexed journal, and a grant proposal on the side.

Before

  • Spends evenings checking whether each cited paper really backs the sentence it sits under.
  • Hears about a contradicting study only when reviewer 2 points it out.
  • Builds his literature matrix by hand in a spreadsheet, copying from PDFs.
  • Can't tell quickly whether a journal is reputable or on a predatory list.

With PaperQED

  • Sees the supporting, partial and contradicting papers for each claim, with verbatim quotes.
  • Discusses the counter-evidence in his draft before a reviewer has to ask.
  • Gets a matrix of aims, methods, samples and findings, every cell linked to its source quote.
  • Checks quartile, indexing and predatory-list flags on each source card.

What you get

What PaperQED gives you for a literature review.

Citation suggestions across languages

Select a claim in your manuscript and get papers that back it, from Crossref, OpenAlex and Semantic Scholar, each with the passage that matters and its journal quality. Insert the one you choose together with its bibliography entry.

  • See the supporting passage before you cite, not after a reviewer asks.
  • Multilingual search finds the international literature for text in any language.
  • Quality badges show quartile, indexing and retractions next to each suggestion.
  • Inserted citations and bibliography entries follow your journal’s citation style.
Citation suggestions across languages. The PaperQED app, shown with sample data.
Figure 2.1. Citation suggestions across languages. The PaperQED app, shown with sample data.

Evidence map: support and counter-evidence for one claim

Pick a claim and see how many papers support it, support it only partly, or contradict it, each with the passage that says so. Counter-evidence is surfaced on purpose.

  • Find the contradicting study yourself, before a reviewer finds it for you.
  • Every label shows a verbatim quote, its page or section, and a confidence level.
  • Spot claims worded more strongly than the literature allows.
  • Labels judged from the abstract only are marked as such.
Evidence map: support and counter-evidence for one claim. The PaperQED app, shown with sample data.
Figure 2.2. Evidence map: support and counter-evidence for one claim. The PaperQED app, shown with sample data.

Literature matrix with every cell linked to its source

Choose your papers and get a matrix of aims, methods, samples, settings, main findings and limitations. Add your own columns. Every cell links to the quote it came from.

  • Skip hours of copying from PDFs into a spreadsheet.
  • Check any cell in one click: the source passage opens beside it.
  • Export to Excel or CSV for your own analysis.
Literature matrix with every cell linked to its source. The PaperQED app, shown with sample data.
Figure 2.3. Literature matrix with every cell linked to its source. The PaperQED app, shown with sample data.

Citation gap and recency check

PaperQED looks at a whole chapter or article and tells you where the reference base is thin: old sources, theories cited second-hand, too few reputable journals.

  • See at a glance how much of your evidence predates the last decade.
  • Find the primary source behind a theory you only cite through a textbook.
  • Know which section leans on too few peer-reviewed sources before you submit.
Citation gap and recency check. The PaperQED app, shown with sample data.
Figure 2.4. Citation gap and recency check. The PaperQED app, shown with sample data.

Citation graph and seminal papers

See how the papers in your library cite each other, and trace a concept back to the paper that introduced it, so your review cites the origin and not only the latest summary.

  • Find the seminal papers your field expects you to cite.
  • Spot clusters and isolated papers in your reading list.
  • Explore from one paper to its strongest neighbours.
Citation graph and seminal papers. The PaperQED app, shown with sample data.
Figure 2.5. Citation graph and seminal papers. The PaperQED app, shown with sample data.

Cross-lingual search

Write or search in your language and get sources in others, including English. Filter by language, year, open access, quartile and source type.

  • Stop missing the international literature because your query wasn't in English.
  • See the paragraph of each result that best matches your sentence.
  • Read a translated abstract when you need help with a paper in another language.
Cross-lingual search. The PaperQED app, shown with sample data.
Figure 2.6. Cross-lingual search. The PaperQED app, shown with sample data.

Source quality on every card

Each source shows its journal quartile, indexing, citation count, age and source type, plus retraction and predatory-list flags, so you can judge a reference before you rely on it.

  • Journal quartile (SJR) and Scopus or DOAJ indexing at a glance.
  • Retractions, corrections and expressions of concern flagged on matched papers.
  • Predatory-list warnings name the list they come from, never a verdict.
  • Citation counts and paper age help you weigh older or less-cited work.
Source quality on every card. The PaperQED app, shown with sample data.
Figure 2.7. Source quality on every card. The PaperQED app, shown with sample data.

Paper reader with an explainer at your level

Open a paper and get the research question, method, findings and limitations highlighted, with an explainer for S1, S2 or researcher level that links each point to the original paragraph.

  • Get through an unfamiliar method faster without losing the source.
  • Jump straight to the method, findings or limitations from the side panel.
  • Explanations in your own language.
Paper reader with an explainer at your level. The PaperQED app, shown with sample data.
Figure 2.8. Paper reader with an explainer at your level. The PaperQED app, shown with sample data.

Works with Zotero and Mendeley

Keep your reference manager. Import BibTeX or RIS exports from Zotero and Mendeley, DOIs, URLs and PDFs, and export BibTeX, RIS, CSL-JSON or a formatted list at any time. Direct two-way sync is coming soon.

  • No need to rebuild a library you already curated.
  • Metadata fixes from the reference check are saved in your PaperQED library and go with every export.
  • Your citation style follows CSL, so the format matches your target journal.

From research question to submission

How Andi's review comes together, step by step.

  1. Step 1: Sharpen the question

    Narrow the topic through questions and related papers until it is answerable.

  2. Step 2: Map the evidence

    For each key claim, see what supports it, what qualifies it and what contradicts it.

  3. Step 3: Build the matrix

    Extract aims, methods, samples and findings across your papers, each cell linked to its quote.

  4. Step 4: Close the gaps

    Find old, second-hand or thin parts of your reference base and fix them.

  5. Step 5: Check before you submit

    Run the reference check on the final bibliography and export it in your journal's style.

The Researcher plan

For articles, reviews and grant proposals: a large quota, the literature review matrix and advanced export.

Start free and upgrade when you need more checks.

Questions

  • Where does the data come from?

    Metadata comes from Crossref, OpenAlex and Semantic Scholar, never from a language model. Claims are checked against the full text of open-access papers or PDFs you upload. When only an abstract is available, the label says so.

  • How does it judge journal quality?

    With public indicators: SJR quartile, Scopus and DOAJ indexing, citation counts and source type. Predatory-journal warnings say which list a journal appears on and link the source; they are never a verdict.

  • Does it work with Zotero and Mendeley?

    Yes, through import and export. Bring in BibTeX or RIS exports from Zotero or Mendeley and export back in BibTeX, RIS or CSL-JSON. Direct two-way sync is coming soon.

  • Are my unpublished manuscripts used to train models?

    No. Your documents are not used to train models, and language-model providers are configured without data retention where that option exists.

  • Can I trust the labels?

    Treat them as a fast first pass. Each label comes with the quote it is based on and a confidence level, and a quote is shown only if it appears word for word in the source. The decision is always yours.

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