- Free search tool. The Academic Graph API and datasets are free and open. Unauthenticated use is rate-limited and an API key starts at 1 request per second.
- Not disclosed
- Not disclosed
- —
- —
- US
Research tools
Semantic Scholar
by Ai2 (Allen Institute for AI) · US
Free AI-powered search tool for scientific literature from Ai2, covering over 200 million papers.
On this page
15/100Tracked
- Regulatory & Compliance0/11
No FDA clearance listed
- Clinical Integration0/7.8
No EHR integrations listed
- Evidence Strength0/27
No peer-reviewed coverage
- Vendor & Market8.4/18
Mid-tier funding and adoption
- Sentiment & Transparency3.3/15.5
Pricing on request, no public amounts
▸ Show all 11 dimensions▾ Hide dimension detail
- FDA clearance0/6
No FDA clearance listed
- HIPAA / SOC2 / BAA0/5
No public HIPAA/SOC2/BAA attestation
- EHR integrations (count)0/4
No EHR integrations listed
- Top-3 EHR coverage (Epic / Oracle / Athena)0/2
None of the top-3 EHRs covered
- Bidirectional write-back0/1
No bidirectional write-back documented
- Peer-reviewed papers0/21
No peer-reviewed coverage
- RCT / meta-analysis / systematic review0/6
No RCT, meta-analysis, or systematic review
- Funding & adoption signal8/12
Mid-tier funding and adoption
- Years in market0/6
Founded year not recorded
- Clinician sentiment (Reddit)0/9
No clinician sentiment data available
- Pricing transparency3/7
Pricing on request, no public amounts
Free AI-powered search tool for scientific literature from Ai2, covering over 200 million papers.
Free search tool. The Academic Graph API and datasets are free and open. Unauthenticated use is rate-limited and an API key starts at 1 request per second.
Bottom line
Semantic Scholar is a free literature search engine from Ai2, the Allen Institute for AI, covering over 200 million academic papers. It finds and displays papers, and it has no EHR link. A clinician or resident who wants a second search engine next to PubMed, with a reader and recommendation feeds, gets it at no cost. It does not synthesise answers to clinical questions, and patient information has no place in the search box.
Who runs Semantic Scholar?
Ai2 is a non-profit research institute that Paul Allen founded in 2014, and Semantic Scholar launched there in 2015. The site describes itself as "a free, AI-powered research tool for scientific literature" that "provides free, AI-driven search and discovery tools." Funding is philanthropic, with no investor round on record, and the About page names no headquarters.
What does it do?
The search index covers "over 200 million academic papers," drawn from publisher partnerships, data providers and web crawls in Ai2's own wording. Third-party pages quote 214 million and 236 million.
The menu lists two further tools. Semantic Reader is an augmented PDF reader. Research Feeds are recommendations tied to an account. Third-party descriptions mention one-sentence TLDR summaries of papers and disagree on how many papers carry one, with claims ranging from "millions" to all of them. Ai2's About page does not state it.
Developers get the Academic Graph API and downloadable datasets, offered "as free and open resources". Unauthenticated use is "rate-limited to 1000 requests per second shared among all unauthenticated users," and an API key starts at "1 RPS on all endpoints". Third-party tutorials on dev.to praise the free API. The API has its own license agreement alongside the Terms of Service and Privacy Policy.
What does it cost?
Free. No paid tier is listed on the API page, and recommendation feeds are tied to an account.
Where does it fall short?
It is a general academic index. A drug-interaction question returns papers to appraise. No BAA is on offer.
Who is it for?
A resident preparing journal club or a researcher following a subfield through Research Feeds gets the most from it. A medical student can use the Reader on a dense PDF without paying anything. A clinician who needs a cited answer in the middle of clinic is looking for a different kind of product.
The verdict
Semantic Scholar is a free index with a reader and a feed, suited to literature work. For clinical answers it is the wrong tool.
Editorial review last generated October 15, 2026. Synthesized from clinician sentiment, peer-reviewed coverage, and our editorial silo picks. Refined by hand where vendor facts change.
What it costs
All tiers are custom-quoted. The vendor does not publish per-provider list pricing.
| Tier | Monthly | Annual | Notes |
|---|---|---|---|
| Free | — | — | Free search tool. The Academic Graph API and datasets are free and open. Unauthenticated use is rate-limited and an API key starts at 1 request per second. |
Source: vendor pricing page. Last checked October 15, 2026.
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