Open Knowledge Maps vs Semantic Scholar (2026): which should you pick?
As of Nov 13, 2026, we pick Semantic Scholar: it is third in our ranking of AI research tools, and it grades higher too, 3.2 against 3.0.
Checked Oct 5, 2026 and Nov 13, 2026 · graded Oct 10, 2026 and Nov 13, 2026 by ToolGPA
Semantic Scholar grades higher on platforms. They get the same grade on value for money, the free plan, features and ease of use.
Price, platforms and features side by side. The table says where each price was read and when.
Open Knowledge Maps
Free visual maps of a research topic from open scholarly sources
Semantic Scholar
Free AI-powered search engine for scientific literature
Which one is for you
Pick Open Knowledge Maps if
- Fits if you are new to a field and want its themes before you read anything
- Works for librarians running a discovery workshop on open sources
Look elsewhere if
- Skip it if you need every relevant paper, as each map holds only the top 100 results
- Not for you if you want papers ranked by quality, because it groups by metadata and does not rank
- Too light for a full literature search, since it never reads full texts
- Watch out: each map takes about 30 seconds because every query runs live
Pick Semantic Scholar if
- Fits if you want free literature search across every field of science
- Works for developers who need open scholarly data through an API
Look elsewhere if
- Not for you if you want to question any paper, since Ask This Paper works on a limited set of them
- Tight if you work outside computer science and the biomedical fields, where papers get no TLDR
- Skip it if you want a phone app, as there isn't one and you use the mobile site
- Watch out: Semantic Reader is still a beta and mostly covers arXiv papers
- Tight if you build on the API: a key starts at 1 request per second, and keyless calls share one pool
How we grade them
| 3.0GPAOpen Knowledge MapsVery good | 3.2GPASemantic ScholarVery good | |
|---|---|---|
| Value for money | AFree outright, and the site shows no paid tier for individual users. Category tools start at $7.92 a month for the cheaper quarter. | AEntirely free, with no paid plans, built by the nonprofit Ai2. Paid plans in this category start at $10 and mostly land around $12 a month, and this costs nothing. |
| Free plan and trial | AEvery map is free with no plan to move up to, and the site shows no cap a normal person would hit. | AYou can search and read papers without an account. A free account adds a library, email alerts, Research Feeds and author page claiming. There are no paid plans, so nothing is held back. The one cap is on API calls: a key starts at 1 request per second. |
| Features | CBuilds topic maps from BASE, PubMed and OpenAIRE records. It does that job fully, but it is a small job: the top 100 results only, metadata not full text. | CMore than 200 million papers with filters for venue, author, type and date, a flag on highly influential citations, and feeds that recommend from what you've saved. The gaps are on its own pages: TLDRs only cover computer science, biology and medicine, and Semantic Reader is a beta, mostly arXiv. |
| Ease of use | BNo store rating on record, but you type a topic and wait about 30 seconds for the map. Nothing to set up. | BNo store rating on record, so B is the ceiling. There's nothing to set up: type a search, filter and read, with no account needed to start. |
| Platforms and integrations | CWeb only. BASE, PubMed, OpenAIRE and ORCID are where the records come from, and no API is listed. | BWeb and a browser extension, with links to Zotero, Mendeley and LibKey and an Academic Graph API where most endpoints work without a key. There's no phone app: the FAQ says to use the site in a mobile browser. |
| Best for | a free visual map of an unfamiliar research topic | free search across the scientific literature |
The GPA is the average of the five grades: an A is 4 points, an F is none. The full reasons are on each tool's page: Open Knowledge Maps and Semantic Scholar. How we grade
Price against what you get
Open Knowledge Maps has no paid plan and scores 2.3 out of 4 on features, ease of use and platforms. Semantic Scholar has no paid plan and scores 2.7.
Semantic Scholar scores higher for the same starting price. Of the other AI research tools on the chart, none scores higher than Open Knowledge Maps for less, and none scores higher than Semantic Scholar for less.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Where they differ
- Open Knowledge Maps also covers mind mapping.
- Semantic Scholar also covers AI search and citations.
At a glance
| Open Knowledge Maps | Semantic Scholar | |
|---|---|---|
| Pricing | Free | Free |
| Starts at | Free | Free |
| Free plan | None | Entirely free, with no paid plans. Papers can be read without an account; a free account adds a library, email alerts, Research Feeds and author page claiming. |
| Free trial | None listed | None listed |
| Web | ||
| Browser extension | ||
| Made by | Open Knowledge Maps | Allen Institute for AI (Ai2) |
| Price read from | openknowledgemaps.org | semanticscholar.org |
| Checked | Nov 13, 2026 | Oct 5, 2026 |
Worth knowing
Open Knowledge Maps
- Each map uses only the top 100 results, so important papers can be missing from it.
- Maps take around 30 seconds to build, because each query is processed live.
- Grouping uses metadata, not full text, and it does not rank papers by quality.
Semantic Scholar
- There is no smartphone app; the FAQ says the site is designed to be used in mobile browsers.
- TLDR summaries are limited to papers in computer science and the biomedical fields.
- Semantic Reader is in beta and covers mostly arXiv papers, and Ask This Paper works on a limited set of papers.
- Unauthenticated API calls share one pool of 1,000 requests per second; an API key starts at 1 request per second.
Key features
Open Knowledge Maps
- Topic maps
- A search produces an interactive map of the top 100 results, grouped by topic similarity into labeled areas you can open.
- Open data sources
- Maps are built from BASE, PubMed and OpenAIRE records, with BASE covering more than 400 million outputs from over 11,000 sources.
- Open access emphasis
- Open access resources are highlighted, and most can be read inside the interface or are one click from the full text.
- Metadata-only grouping
- Clusters come from titles, abstracts, authors, journals and subject keywords, not from reading full texts; the site says it has no hallucinations.
- Custom services for organizations
- Institutions can embed Open Knowledge Maps' discovery tools in their own systems through a separate offering.
Semantic Scholar
- Paper search with TLDR summaries
- Searches papers with filters for venue, author, publication type and date. TLDRs are very short AI summaries, available for nearly 60 million papers in computer science, biology and medicine.
- Highly Influential Citations
- A machine-learning model flags the citations where the cited paper had a significant effect on the citing one, so a long citation list has a starting point.
- Library and Research Feeds
- Save papers into folders, share public folders and bulk export citations. Turning on a Research Feed for a folder brings paper recommendations based on its contents.
- Paper and author alerts
- Email alerts report new citations of a chosen paper, or new papers and citations for an author you follow.
- Semantic Reader
- A beta reading view for most arXiv papers, with in-line citation cards, a table of contents, AI skimming highlights and on-demand definitions of terms.
- Academic Graph API and datasets
- A REST API for papers, authors, citations, venues and recommendations, plus downloadable datasets. Most endpoints work without a key.
Plans
Open Knowledge Maps
Free$0
Create knowledge maps from the search page; the site shows no paid tier for individual users.
Semantic Scholar
Free$0
Search, TLDR summaries, Semantic Reader, a paper library, alerts and Research Feeds, plus rate-limited API access.
Common questions
Which is cheaper, Open Knowledge Maps or Semantic Scholar?
As of Nov 13, 2026, both Open Knowledge Maps and Semantic Scholar are free to use.
Which has a free plan, Open Knowledge Maps or Semantic Scholar?
As of Nov 13, 2026, both Open Knowledge Maps and Semantic Scholar have a free plan.
Which platforms do Open Knowledge Maps and Semantic Scholar run on?
As of Nov 13, 2026, only Semantic Scholar lists a browser extension. Both list a web app. A platform missing from a listing is one its maker's pages did not mention.
More comparisons
How this page was made
- The verdict at the top follows a fixed rule. When both tools are in the same category and either is in our top three for it, the verdict follows that ranking: the higher-placed tool is our pick. The top three weigh who each tool suits as well as its grades, so a pick can go against the GPA. Otherwise the page does not pick one and says which grades higher: the higher GPA first; on a tie, the one with a free plan, then the one that starts cheaper in dollars a month, counted the same way for both; if they are still level, what the choice depends on.
- The grades are our own, from each tool’s review or report card. The GPA is their average.
- Prices, plans and platforms come from each tool’s listing. The table above says where each price was read and when.
- The differences and the answers to the questions are worked out from those listings.