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| Price | Account creation | Search index size | Search Feed | Links to full-text | Notes | Instructions | |
|---|---|---|---|---|---|---|---|
| Elicit | Free | Compulsory |
More than 200 million. Uses Semantic Scholar's corpus |
Phrase of natural language. | Linking to OA articles. | Also offers a function to help brainstorm research questions | |
| Keenious |
Subscription, free trial |
Possible |
More than 200 million. Uses OpenAlex. |
Text, DOI. The longer the text, the better. |
LibKey integrated. | Can be integrated to other text editors. | |
| Free | Possible | Over 200 million | Keyword search. |
Linking to OA articles. DOI to publisher's sites |
You can search for most referenced or most impactful references | ||
| Free | Compulsory |
Over 200 million. You need to choose if you are searching from PubMed or Semantic Scholar. |
Keywords, title, DOI, PMID |
Linking to OA articles DOI to publisher's sites |
Reference relationships between articles and authors are shown with arrows and lines. Adding articles to the collection provides a list of similar articles and a list of authors who may be of interest. |
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