What Claude (Anthropic) with web search answered for patent-search services (startups) on 2026-09-12

Claude (Anthropic) with web search claude-opus-5 asked 2026-09-12

Coverage: Claude (Anthropic) with web search. Other engines not included.

The question asked, verbatim: best patent-search services for startups

Brands named, in the order the engine gave

1. Google Patents mentioned
   Google Patents - Best starting point.
2. Espacenet mentioned
   Espacenet (EPO) - What to use when you want the thorough free search.
3. Lens.org mentioned
   Lens.org - The one I'd pick for analytics rather than lookup: ~155M+ patent records with citation graphs, assignee/portfolio views, and good filtering.
4. WIPO PATENTSCOPE mentioned
   WIPO PATENTSCOPE and USPTO Patent Public Search - worth knowing as supplements.
5. PATENTSCOPE mentioned
   WIPO PATENTSCOPE and USPTO Patent Public Search - worth knowing as supplements.
6. PQAI mentioned
   PQAI - Free, nonprofit, AI prior-art search.
7. you're mentioned
   Once you're actually about to spend money on a filing, a professional search firm is the highest-value purchase - roughly $500-$1,500 for a US patentability/novelty search with an analyst-written report, more like $2,000-$3,000+ for crowded software/electrical or biotech/chemical art.
8. Cardinal Intellectual Property mentioned
   Firms commonly named here are Cardinal Intellectual Property, Landon IP (part of Clarivate), and Patent Insight/GreyB for landscape work.
9. Landon IP mentioned
   Firms commonly named here are Cardinal Intellectual Property, Landon IP (part of Clarivate), and Patent Insight/GreyB for landscape work.
10. Clarivate mentioned
    Firms commonly named here are Cardinal Intellectual Property, Landon IP (part of Clarivate), and Patent Insight/GreyB for landscape work.
11. PatSnap mentioned
    PatSnap, Questel Orbit Intelligence, and Clarivate Derwent Innovation are the enterprise standards.
12. Questel mentioned
    PatSnap, Questel Orbit Intelligence, and Clarivate Derwent Innovation are the enterprise standards.
13. Questel Orbit mentioned
    PatSnap, Questel Orbit Intelligence, and Clarivate Derwent Innovation are the enterprise standards.
14. Questel Orbit Intelligence mentioned
    PatSnap, Questel Orbit Intelligence, and Clarivate Derwent Innovation are the enterprise standards.
15. Orbit mentioned
    PatSnap, Questel Orbit Intelligence, and Clarivate Derwent Innovation are the enterprise standards.
16. Clarivate Derwent Innovation mentioned
    PatSnap, Questel Orbit Intelligence, and Clarivate Derwent Innovation are the enterprise standards.
17. Derwent mentioned
    PatSnap, Questel Orbit Intelligence, and Clarivate Derwent Innovation are the enterprise standards.
18. Derwent Innovation mentioned
    PatSnap, Questel Orbit Intelligence, and Clarivate Derwent Innovation are the enterprise standards.
19. UpCounsel mentioned
    - UpCounsel - patent search cost (https://www.upcounsel.com/patent-search-cost)

Sources the engine cited

The answer, as recorded

## Start here (free, and genuinely good enough for the first pass) **Google Patents** - Best starting point. Full-text across 100+ patent offices plus non-patent literature (Google Scholar integration), which matters because prior art isn't only patents. The "similar documents" feature does a lot of work for a first-pass novelty check. Free. **Espacenet (EPO)** - What to use when you want the *thorough* free search. Best-in-class family data and legal status (is a patent actually in force, and where?), and its classification-based searching (CPC) is how professionals actually search - keyword-only searching misses a lot. Free. **Lens.org** - The one I'd pick for analytics rather than lookup: ~155M+ patent records with citation graphs, assignee/portfolio views, and good filtering. Useful for "who owns this space" questions and for competitor/landscape work. Free tier is real; paid tiers for teams. **WIPO PATENTSCOPE** and **USPTO Patent Public Search** - worth knowing as supplements. PATENTSCOPE for PCT applications and cross-lingual search; USPTO's tool for authoritative US file data. **PQAI** - Free, nonprofit, AI prior-art search. You paste a plain-English description of your invention instead of guessing keywords. Good sanity check alongside Google Patents, weak as a sole source. ## When to pay for a human Once you're actually about to spend money on a filing, a **professional search firm** is the highest-value purchase - roughly **$500-$1,500** for a US patentability/novelty search with an analyst-written report, more like **$2,000-$3,000+** for crowded software/electrical or biotech/chemical art. Firms commonly named here are **Cardinal Intellectual Property**, **Landon IP (part of Clarivate)**, and **Patent Insight/GreyB** for landscape work. You can also get search + a written patentability opinion bundled through your patent attorney (typically $2,000+), which is the version that carries legal weight. My honest take for a seed-stage startup: do the free search yourself to kill obviously-dead ideas cheaply, then buy one professional search before you commit to filing. The DIY search is for triage; it is not a substitute for a searcher who knows CPC classification in your field. ## Commercial platforms - mostly skip these early **PatSnap**, **Questel Orbit Intelligence**, and **Clarivate Derwent Innovation** are the enterprise standards. Reported pricing lands around **$25K-$60K/year** (Orbit toward the lower end, Derwent the highest), which is hard to justify under ~20 patents. Orbit is generally the strongest on European coverage and portfolio workflow; PatSnap on visualization and executive-readable dashboards; Derwent on claim-level analysis for litigation-grade work. Most ask for a demo rather than publishing prices - treat the figures above as ballpark, not quotes. Two caveats worth flagging: much of the "top 10 AI patent tools 2026" content online is vendor SEO, and several newer AI-drafting/search startups in that genre I couldn't independently verify - I'd be skeptical of any tool whose main evidence of quality is its own blog post. And nothing here, including a paid search, guarantees novelty; searches reduce risk, they don't eliminate it. Sources: - [Google Patents / Espacenet / Lens.org comparison - UMD Libraries guide](https://lib.guides.umd.edu/patent_tm/patent_search_tips) - [Espacenet](https://worldwide.espacenet.com/) - [PQAI - free alternatives to Google Patents](https://projectpq.ai/5-free-and-possibly-more-efficient-alternatives-to-google-patents/) - [Lens.org vs Google Patents for startups](https://patentailab.com/best-free-patent-search-engines-startups/) - [PatSnap vs Derwent vs Orbit - 12-criteria comparison and pricing](https://beyondelevation.com/blog/posts/patsnap-vs-derwent-vs-orbit-comparison/) - [Patentability search cost guide](https://casrai.org/guides/patentability-search-cost) - [Patent search cost by search type](https://www.ipiry.com/guides/patent-search-cost) - [UpCounsel - patent search cost](https://www.upcounsel.com/patent-search-cost)

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Answer Watch records what one AI answer engine said on one date, nothing more. Each page names the engine and the model, carries the date the question was asked, and lists the brands that appeared in the answer in the order the engine gave them, with the sources it cited. It is a measurement, not a ranking, not a recommendation and not a claim about the world. Brands that did not appear in an answer are not named on any public page. Coverage: Claude (Anthropic) with web search. Other engines not included.