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Last updated: January 2026

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Feature
S
Semantic Scholar
S
SciSpace
Rating
4.4/5
4.3/5
Pricing Model Free Freemium
Starting Price Free Free tier
Pricing Details
100% FREE

Free

$0 forever

  • 200M+ academic papers indexed
  • AI-powered paper summaries
  • Citation graph & research feeds
  • Public API for developers
  • No paid tiers — backed by Allen Institute for AI

Prices verified February 2026. Semantic Scholar is a free, non-profit research tool backed by the Allen Institute for AI.

Basic (Free)

$0/month

  • Chat with PDFs
  • Daily AI actions
  • Basic research features
MOST POPULAR

Premium

$20/month

$12/mo billed annually ($144/year)

  • Unlimited literature searches
  • Full AI writer access
  • High-quality AI models
  • Ad-free experience

Teams

$18/seat/month

$8/seat billed annually

  • Admin controls
  • Team collaboration
  • Customer success manager

Advanced

$70/month

  • Deep Review feature
  • Maximum AI capabilities
  • Priority support
  • Advanced research tools

Prices verified February 2026. Annual billing saves up to 40%.

Category Research Research
Description AI-powered academic search engine AI research assistant for academic papers
Key Features
  • AI-powered paper search
  • TLDR paper summaries
  • Citation context analysis
  • Research feeds
  • Author profiles
  • AI paper explanations
  • Literature review
  • Citation analysis
  • Paper summaries
  • Math/formula explanations
Pros
  • + Completely free
  • + Excellent AI-powered search
  • + TLDR summaries save time
  • + Massive paper database
  • + Open API for developers
  • + Citation influence scoring
  • + Excellent at explaining complex papers
  • + Good literature discovery
  • + Math and formula explanations
  • + Clean reading interface
  • + Free tier is useful
Cons
  • - No built-in reading tools
  • - Less interactive than SciSpace
  • - No AI chat for questions
  • - Coverage varies by field
  • - Focused on academic papers only
  • - Smaller database than Google Scholar
  • - Premium needed for heavy use
  • - Citation formatting limited
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