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Open Research Knowledge Graph

Free#29 of 33 in Research Paper Discovery Tools

Open Research Knowledge Graph: A free, open-source tool for structuring and comparing research contributions. Ranked #29 of 33 in Research Paper Discovery Tools by our editors (6.5/10); pricing: Free plan; best for comparing structured research contributions.

6.5/10Editor score

Visit ORKG

Open Research Knowledge Graph6.5 Visit ORKG

At a glance

Editor score
6.5 / 10
Pricing
Free plan
Best for
Comparing structured research contributions
Free plan
Yes
Paid from
None
Citation graph
No
Facts checked
5 Oct 2026

Where it wins
- Compare paper contributions around a research question
- Filter comparisons, visualize results, and export in four formats
- Import paper metadata by DOI and publish comparisons with DOI identifiers
Where it doesn't
- Its workflow centers on comparisons, not general paper discovery
- No dedicated citation-link mapping
- No verified semantic or natural-language paper search

Our verdict on Open Research Knowledge Graph

Open Research Knowledge Graph (ORKG) represents scholarly papers and their contributions as structured, machine-actionable data. Researchers can browse papers, inspect an individual paper’s knowledge graph, and organize contributions around a research question. Its comparison-first approach suits people who want to examine how papers address a specific problem; it is less suited to readers looking primarily for broad paper discovery or citation-network exploration.

The comparison workflow supports tabular views, faceted browsing for larger comparisons, and charts for visualizing results. Users can add papers manually or import paper metadata using a DOI lookup, and CSV files can be used to bring in comparison data. Templates help structure paper contents. These features make ORKG relevant when a research question can be expressed through comparable contributions, rather than simply a list of papers to browse.

Comparisons can be exported as CSV, LaTeX, RDF, or PDF, and published with DOI identifiers. ORKG is open source and free, with web and API access and cloud deployment. Documentation and email are listed as support channels. Choose it for structured literature mapping and reusable comparisons; look elsewhere if your central need is dedicated citation-link mapping or semantic and natural-language paper search. Its focus is on representing and comparing contributions, not serving as a general-purpose discovery interface.

Your product? Our editors can test Open Research Knowledge Graph in depth and publish a review, labelled as paid · from $99/mo →

Open Research Knowledge Graph pricing

Plans Free planFree Free to use — no paid tier required for the core job.

See plans on orkg.org

Open Research Knowledge Graph fact sheet

Free plan	Yes
Paid from	None
Citation graph	No
Semantic search	Not verified
Related-paper suggestions	Not verified
Literature mapping	Yes
Natural-language search	Not verified
Export formats	CSV, LaTeX, RDF, PDF
Deployment	Cloud
Platforms	Web
Support	Email, Docs
Built for	Solo, Small business, Mid-market, Enterprise (editorial estimate)
Pricing	Free plan
Website	orkg.org
Facts checked	5 Oct 2026

Alternatives to Open Research Knowledge Graph

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Featured on iTechGuides

Open Research Knowledge Graph is listed in our Research Paper Discovery Tools directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 20 Oct 2026 · How we research and update