Direct comparison
Google Scholar vs Scopus Compared
Compare Google Scholar and Scopus: coverage, content selection, citation-counting methods, author IDs, metrics, and which to use.
Side-by-side comparison
| Dimension | Google Scholar | Scopus |
|---|---|---|
| What it is | Free web search engine for scholarly literature, operated by Google | Subscription abstract-and-citation database, owned by Elsevier |
| Content selection | Automated web crawling and indexing; no independent editorial board or published inclusion criteria | Curated by the independent Content Selection & Advisory Board (CSAB) against published criteria |
| Approximate coverage | Broadest of any bibliometric source — journals, theses, preprints, conference papers, patents, books, grey literature | 100M+ records, 28,000+ active journals/proceedings, ~8,000 publishers, 330+ subject categories (Elsevier-reported, early 2025) |
| Citation counting | Counts citations from any indexed document, including non-peer-reviewed and grey literature — typically the highest counts | Counts citations only from other Scopus-indexed (CSAB-vetted) documents — narrower but more consistently sourced |
| Author identification | Google Scholar Citations profile — free, self-created and self-curated by the researcher | Scopus Author ID — auto-generated algorithmically after 2+ indexed documents; corrected via merge request or Author Feedback Wizard |
| Author-level metrics | Total citations, h-index, i10-index (10+ citations, Scholar-specific, introduced 2011) | Total citations, h-index |
| Journal-level metrics | h5-index via Google Scholar Metrics | CiteScore (Elsevier), SJR (SCImago), SNIP (CWTS Leiden) — all computed from Scopus data |
| Access / cost | Free, no login required to search | Institutional subscription required for full access |
| Programmatic / API access | No official public API of any kind | Official documented Elsevier APIs (Search, Abstract Retrieval, Author Retrieval) |
| Typical use | Quick literature discovery, grey-literature search, tracking broad citation reach | Formal bibliometric analysis, tenure/promotion dossiers, funder and institutional reporting |
Common questions
FAQ
Which has a higher h-index for the same researcher, Google Scholar or Scopus?+
Google Scholar typically produces an equal or higher h-index than Scopus for the same researcher, because it draws on a larger, less-filtered pool of citing documents, including preprints and grey literature that Scopus excludes.
Can I use Google Scholar citation counts in a grant or tenure application?+
Some institutions accept Google Scholar-based counts, but many funders and promotion committees specifically expect Scopus or Web of Science data because it is CSAB-vetted and reproducible. Check the specific funder’s or institution’s requirement first.
Do I need both a Google Scholar profile and a Scopus Author ID?+
In practice, yes, if both visibility and formal bibliometric reporting matter to you. The two identifiers are not linked: a Google Scholar Citations profile is free and self-managed, while a Scopus Author ID is algorithmically generated and requires Elsevier’s review process to correct.
Is Scopus coverage a subset of Google Scholar?+
Largely, yes. Independent citation-overlap studies have found Google Scholar’s indexed content includes the great majority of what Scopus covers, plus substantial additional material — though exact overlap varies by discipline and neither platform is fully complete.
