C
CAI search engine that answers questions from peer-reviewed research papers
Free, from $20/mo
Semantic Scholar vs Westlaw Precision
Pricing, features, platforms and who each one suits — side by side.
S
Choose Semantic Scholar if…
- you want a free plan to start with
- you need an API to build on
- you're in its core audience: researchers, students
W
Choose Westlaw Precision if…
- you're in its core audience: law firm attorneys, corporate counsel
Side by side
Feature Semantic Scholar Westlaw Precision
Pricing modelFreeContact for pricing
Starting priceFree—
Free plan
Free trial
API
Open source
Source citations—
Academic paper search—
Citation export—
Shared workspaces—
PlatformsWeb, APIWeb
CategoryResearch AssistantsLegal
Rank in its category—#3 of 10
CompanyThe Allen Institute for AIThomson Reuters
Based in——
Founded2015—
Part ofAi2—
Key features
S Semantic Scholar
- Search across 239+ million scientific papers
- Coverage of all fields of science
- Semantic Reader augmented reading for select papers (beta)
- Developer API with paper search
- API documentation, tutorials and gallery
- Free user accounts
- Resources for librarians and publishers
W Westlaw Precision
- AI-assisted legal research on verified Westlaw content
- Agentic AI for moving from research to strategy (Westlaw Advantage)
- Precise, verified answers to complex research questions
- Bundles with CoCounsel for analysis and drafting
- Integration with Practical Law guides, templates and checklists
- Practice-area coverage including litigation, M&A and employment law
Plans and prices
From each vendor's site. Prices change — confirm before buying.
Semantic Scholar
FreeFree
Westlaw Precision
Contact for pricing. Plan details aren't published.
Strengths and limitations
Semantic Scholar
- Free to use
- Indexes over 239 million papers from all fields
- Public API with documentation and tutorials
- Built by the nonprofit research institute Ai2
- Semantic Reader is in beta and only works on select papers
- No mobile apps listed
Westlaw Precision
- Built on Westlaw content that Thomson Reuters says draws on 150 years of expertise
- Several tiers, from Westlaw Edge to Westlaw Advantage
- Can be bundled with CoCounsel and Practical Law
- No public pricing; plans go through sales
- The page does not describe Westlaw Precision by name
- No free trial listed
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Facts from each vendor's public pages, prices checked Oct 26, 2026. Editorial policy