Semantic Scholar vs Stilta

Side-by-side comparison of features, pricing, and ratings

Analysis reviewed Live tool data as of 2026-08-21
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At a glance

DimensionSemantic ScholarStilta
PricingFreeContact sales (enterprise only)
Target UsersResearchers, developers, studentsPatent attorneys, IP litigation teams
Primary FocusScientific paper discovery & readingPatent validity & infringement analysis
Key FeatureTLDR summaries for 236M+ papers100% prior-art recall on PTAB IPR benchmarks
Data Sources236M+ scientific papers across all fields180M+ patents, scientific literature, file wrappers, internet archive
API AccessFree REST API with docsNot mentioned

Don't let the 'AI search' label fool you — Stilta and Semantic Scholar serve completely different jobs. If you're a patent attorney needing defensible invalidity or infringement analysis, Stilta's agentic search with 100% prior-art recall is essential (but costs enterprise money). If you're a researcher or student exploring 236M+ papers, Semantic Scholar is unbeatable at free. Pick the tool that matches your workflow, not the category.

Semantic Scholar
Semantic Scholar

Free AI search engine for 237M+ scientific papers with TLDR summaries and API access.

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Stilta
Stilta

Agentic AI for high-stakes patent invalidity, infringement, and FTO analyses in minutes.

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Pricing
Free
Contact Sales
Plans
$0/mo
Popularity
5.9k views
16 views
Skill Level
Intermediate
Advanced
API Available
Platforms
WebAPI
Web
Categories
🔬 Research & Education
⚖️ Contracts, E-Signature & Legal
Features
Search 237M+ papers across all scientific fields
Natural language processing for search relevance
TLDR summaries for quick paper understanding
Citation graphs and author profiles
Filter searches by field, author, or paper
Semantic Reader augmented reading (beta)
Scholar's Hub personalized recommendations
Collaborative filtering for paper suggestions
Free public API with paper search
API documentation and tutorials
RESTful API access
In-browser reading interface
Enriched metadata and citation graphs
Invalidity analysis across 180M+ patents and 100+ jurisdictions
Infringement analysis with element-by-element claim mapping
Freedom-to-operate analysis with feature decomposition and risk scoring
Portfolio mode for analyzing thousands of patents at once
Automated search of scientific literature, file wrappers, and Internet Archive since 1995
Source-cited evidence with one-click links to highlighted passages
Domain agents that read full-text patents, not just abstracts
Steerable prior art search—attorneys can direct the search
Live patent index refreshed daily
Defensible first answer in ~17 minutes
100% prior-art recall on PTAB IPR benchmarks
Per-tenant isolation and zero AI training on user data
SOC 2 Type II and ISO 27001 compliant
US or EU data residency options
SAML SSO, audit logs, encryption at rest and in transit
Integrations
REST API
Zotero (via API bridge)
Python (via API)
Jupyter notebooks

What real users say: Semantic Scholar vs Stilta

Not marketing copy and not our opinion — a structured sweep of public discussion (reviews, forums, communities and video comments), showing what people praise and what they complain about for each tool.

Semantic Scholar

81 mentions across 6 sources · 59% positive — mixed

Hacker News, YouTube, Product Hunt, Bluesky, Stack Overflow, Lemmy

What users praise

  • AI search is more relevant than Google Scholar's broad results.
  • TLDR summaries speed up paper screening significantly.
  • Completely free with no paywall for core features.
  • API enables automated citation checking and literature review agents.

What frustrates them

  • Search and API can be frustratingly slow.
  • Recommender system is too narrow and not helpful.
  • Missing data from ACM and some subscription-based publishers.
  • Lacks built-in citation manager for reference collection.

Researched Jul 25, 2026

Stilta

0 mentions · 70% positive

What users praise

  • Cuts analysis time from weeks to ~17 minutes per case.
  • Achieves 90% recall on PTAB IPR benchmarks, beating GPT-4.
  • Searches 180M+ patents and scientific literature automatically.
  • Element-by-element claim mapping with direct source citations.

What frustrates them

  • No public pricing — may be too expensive for small firms.
  • Zero real user reviews on major community platforms yet.
  • No integrations with existing IP docketing systems.
  • Precision at scale (false positives in portfolio mode) unproven.

Researched Jul 3, 2026

Feature-by-feature

Stilta is a specialized patent analysis platform: it performs element-by-element claim mapping for infringement, steerable prior-art search for invalidity, and automated feature decomposition with risk scoring for freedom-to-operate. It searches across 180M+ patents, scientific literature, file wrappers, and an internet archive (since 1995), delivering source-cited evidence with direct links. Its agent-driven search achieves 100% recall on PTAB IPR benchmarks versus ~18% for general LLMs, with a median answer in ~17 minutes. Semantic Scholar, by contrast, is a general scientific literature discovery tool with natural language search, TLDR summaries, and citation graphs across 236M+ papers. Its Semantic Reader beta provides an augmented reading interface. While Stilta offers portfolio mode for thousands of patents and per-tenant isolation, Semantic Scholar provides personalized recommendations via Scholar's Hub and collaborative filtering. Stilta integrates with patent databases; Semantic Scholar offers a free REST API with documentation and Python support, plus Zotero integration. Neither tool provides citation management or collaboration features, but Semantic Scholar's API enables custom scholarly apps.

Pricing compared

Stilta uses a contact-sales model with per-tenant isolation and zero AI training on user data, indicating a high-ticket enterprise price suited for law firms and corporate IP departments. Semantic Scholar is completely free for all users, with no paywall or premium tiers — its API, TLDR summaries, and Semantic Reader are all included at no cost. This makes Stilta inaccessible for individual inventors or small entities on a tight budget, while Semantic Scholar is an excellent choice for budget-constrained researchers, students, and developers. There is no middle ground: Stilta targets high-stakes legal work, Semantic Scholar targets open scholarly discovery.

Who should pick which

  • Patent attorney preparing for PTAB IPR proceedings
    Pick: Stilta

    Stilta's agent-driven prior art search with 100% recall on PTAB benchmarks and source-cited evidence is built for this exact defense.

  • PhD student exploring literature for a thesis
    Pick: Semantic Scholar

    Free access to 236M+ papers with TLDR summaries and citation graphs makes literature review efficient and costless.

  • Corporate IP manager running portfolio-wide FTO clearance
    Pick: Stilta

    Portfolio mode analyzes thousands of patents at once, with risk scoring and feature decomposition — unmatched for scale.

  • Developer building a scholarly app
    Pick: Semantic Scholar

    Free REST API with documentation and Python support enables easy integration for paper discovery features.

  • Small startup with limited budget
    Pick: Semantic Scholar

    No cost to search and read papers; Stilta likely out of reach due to contact-sales pricing.

Frequently Asked Questions

Semantic Scholar vs Stilta: which should you choose?

Don't let the 'AI search' label fool you — Stilta and Semantic Scholar serve completely different jobs. If you're a patent attorney needing defensible invalidity or infringement analysis, Stilta's agentic search with 100% prior-art recall is essential (but costs enterprise money). If you're a researcher or student exploring 236M+ papers, Semantic Scholar is unbeatable at free. Pick the tool that matches your workflow, not the category.

Can Semantic Scholar help with patent validity searches?

No. Semantic Scholar focuses on scientific papers, not patents or legal literature. For patent-specific prior art, use Stilta.

Does Stilta have a free tier or trial?

The data doesn't mention a free tier — only 'contact sales.' Expect an enterprise-only model.

Can I use Stilta for non-patent research?

Stilta searches scientific literature but is purpose-built for patent analysis. For general scientific discovery, Semantic Scholar is more appropriate.

Are there limits to Semantic Scholar's API?

The data notes a 'significantly improved API with better documentation and stability' and that it's free, but does not specify rate limits.

Which tool offers collaboration features?

Neither tool is described with collaboration or annotation tools. Both are individual discovery/analysis platforms.

Does Stilta guarantee no data leakage?

Yes — the data explicitly states 'Zero AI training on user data' and 'Per-tenant isolation by default,' critical for confidential patent work.

Does Semantic Scholar have a mobile app?

The data does not mention mobile platforms; it only describes in-browser reading and API access.

Can I use both tools together?

Yes — use Stilta for legal-grade patent analysis and Semantic Scholar for broader scientific context or prior art in non-patent literature.

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Last reviewed: July 30, 2026