It depends on what you are looking for? If you are looking for search engine that distills papers from journals and allows them to be searched then the obvious choice to start with is Google Scholar. There are likely to be subject specific ones in the area(s) that you are interested in too - so in my field there are a many ( https://eric.ed.gov/ for example) some based in one country, some more global.

Research Gate and Google Scholar because these bases are highly substantively correlated but not fully correlated.

I agree with David Wooff .

David Wooff

Google scholar is a common good option

However its tedious to be used compared to scopus that shows you all the abstracts

plus the filters aren't so desirable for me

Google Scholar and Research Gate.

pubmed

PLOS ONE

Katerina Kouzari Nikolay Bondarovich

Wow Thank you

These are good suggestions

'

No problem

Check this one too

http://m.jbc.org/site/misc/announcements.xhtml

Dear check Google scholar, Researchgate, Academia Edu, Web of Science etc

A new and highly credible database is Dimensions - https://app.dimensions.ai/discover/publication - with over 102 million citations. Worth checking out and free too use, like Google Scholar.

Emmanuel Ifeanyi Obeagu

Thank you so much

I asked such question cause For same author

I used scopus to check his publications that gave me different result than google scholar citations and others

Its a big question for me

Google Scholar (GS) could be the database with the largest coverage from variety of subject domains with free of access. However, I noticed that most literature criticized GS because of the following reasons: no one knows how and from where GS collects data (i.e. unknown sources), duplicate citation counts, limited search strategies, and indexation of non-scholarly content. One can notice that there are a lot of comparisons among GS, Web of Science (WoS), and Scopus.

Comparisons between WoS and Scopus reveal that Scopus covers more titles than WoS. However, the coverage in terms of time, WoS is ahead of Scopus since it was started several years before starting Scopus. As I remember, the records included in Scopus is limited to the year 1995. Studies also revealed that WoS is somewhat biased towards North American publications, while Scopus is not so. In case of searching, both these databases/services include approximately similar capabilities, but at times certain capabilities exceed the capabilities of the other. This is common for both databases.

The reason for different publication counts observed from GS and Scopus for the same search could be the duplicate records/citations included in GS.

Manjula Wijewickrema

Oh Amazing

That is a great analysis

For the same author GS and Scopus resulted different :l

@Gabris

Yes, it could be happened, because of duplicate publication/citation counts of GS.

Names of certain important data-bases have appeared while actual data yet needs to be considered to designate winner.

I dont think that there can be a winner

I'm not sure who even decides what is reliable and what is not

Dear William Badke indeed, Dimensions has a lot of articles, I have seen of mine there too: https://app.dimensions.ai/discover/publication?search_text=rudi%20darson&search_type=kws&search_field=full_search. My question is who gave them the information. How do they collect them. It is the same question according to Manjula Wijewickrema asked about Google Search.

In the case of Dimensions, unlike Google Scholar, they name the sources of their data. Download a report from their parent company here - https://dimensions.figshare.com/articles/A_Guide_to_the_Dimensions_Data_Approach/5783094 - and see page 15. They are using only official collections of non-predatory, academic resources, and they name them.

Several names are indicated in this discussion.

Web Science

Google Scholar

Bibliographic Databases

Education