Scopus vs Web of Science: Selectivity vs Coverage Breadth
Web of Science applies a rigorous, editorially curated selection process before a journal is added to its core citation indexes (SCIE, SSCI, AHCI). This selectivity is part of why a Web of Science listing carries prestige — inclusion itself is a quality signal. Scopus indexes a substantially larger number of journals, including more regional, open-access, and emerging-field publications. This broader net means more journals get a metric (CiteScore), even if they’d never qualify for a Web of Science listing. Neither approach is “better” outright — Web of Science favors precision and prestige, Scopus favors comprehensiveness. See our how to check journal indexing guide for verifying a specific title in either database.Metrics Each Database Produces
| Web of Science | Scopus | |
|---|---|---|
| Flagship metric | Journal Impact Factor (JIF) | CiteScore |
| Citation window | 2 years (standard) | 4 years |
| Document types counted | Citable items only (articles, reviews) | All document types |
| Quartile system | JCR quartiles | CiteScore percentile/quartile |
Cost and Access
Web of Science and the Journal Citation Reports are paywalled institutional subscriptions — individual researchers typically access them through a university or employer library account. Scopus is also a paid subscription, but its underlying CiteScore values are publicly available for free through Elsevier’s CiteScore portal, making it more accessible to researchers without institutional access.Which Database Fits Which Use Case
- Choosing between two well-established Western-language journals in a mainstream field — Web of Science/JIF is often the default reference point institutions expect
- Evaluating a newer, regional, or interdisciplinary journal — Scopus is more likely to have coverage at all
- Cross-disciplinary comparison — Scopus-based metrics like SNIP are built specifically to normalize across fields with different citation habits
- Institutional tenure/promotion requirements — check which database your institution explicitly references, since policies sometimes name one specifically
Practical Recommendation
Don’t rely on a single database when evaluating an unfamiliar journal. Check both where possible:- Confirm indexing status in each database using our indexing verification guide
- Compare JIF and CiteScore side by side rather than treating either as definitive
- If the journal is only in one database, understand what that implies about its coverage and maturity
- Weigh field norms — some disciplines rely far more heavily on one database’s conventions than the other
Is Scopus or Web of Science Better for Finding an Impact Factor?
For the Impact Factor specifically, Web of Science wins by default: the Journal Impact Factor is a Clarivate metric, calculated from Web of Science data and published only in Journal Citation Reports. Scopus does not publish a Journal Impact Factor at all — its equivalent journal metric is CiteScore. Use Scopus to cross-check a journal’s identity, ISSN, and CiteScore; use Web of Science (via JCR) whenever the number you need is the official JIF.
Which Database Is More Selective: Scopus or Web of Science?
Web of Science is the more selective of the two. Its Core Collection applies stricter editorial criteria and tiers journals across SCIE, SSCI, AHCI and ESCI, while Scopus deliberately covers a broader range of titles, including more regional and newer journals. Neither is automatically “better”: Web of Science selectivity is why a JIF carries weight in evaluations, while Scopus breadth is why it finds citations and journals that Web of Science misses.
Key Takeaways
- Web of Science is more selective and produces JIF; Scopus has broader coverage and produces CiteScore
- The two databases use different citation windows and document-type rules, so scores aren’t directly comparable
- Scopus/CiteScore data is more freely accessible than Web of Science/JCR data
- Cross-checking both databases gives a more complete picture than relying on one