What Claude (Anthropic) with web search answered for patent-search services (small businesses) on 2026-10-18

Claude (Anthropic) with web search claude-opus-5 asked 2026-10-18

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

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

Brands named, in the order the engine gave

1. Google mentioned
   Google Patents - the first stop for almost everyone.
2. Google Patents mentioned
   Google Patents - the first stop for almost everyone.
3. Espacenet recommended
   Espacenet (EPO) - best for non-US and international coverage, ~150M documents, strong classification tools and family/legal-status views.
4. Lens.org mentioned
   Lens.org - free tier is strong, and it's the best of the free tools for linking patents to scientific literature and for sharing/annotating a collection with a colleague or attorney.
5. Cardinal Intellectual Property mentioned
   Firms worth getting quotes from: Cardinal Intellectual Property, Landon IP (CPA Global/Clarivate), Patent Scope Research, or your attorney's preferred searcher.
6. Landon IP mentioned
   Firms worth getting quotes from: Cardinal Intellectual Property, Landon IP (CPA Global/Clarivate), Patent Scope Research, or your attorney's preferred searcher.
7. Clarivate mentioned
   Firms worth getting quotes from: Cardinal Intellectual Property, Landon IP (CPA Global/Clarivate), Patent Scope Research, or your attorney's preferred searcher.
8. Scope mentioned
   Firms worth getting quotes from: Cardinal Intellectual Property, Landon IP (CPA Global/Clarivate), Patent Scope Research, or your attorney's preferred searcher.
9. PatSeer mentioned
   PatSeer - the one I'd point a small business to first.
10. PatSnap mentioned
    PatSnap - more polished, strong AI-assisted search and innovation analytics, but positioned at 51-200+ employee companies, per-feature pricing, and the most-cited complaint is add-on module cost.
11. Derwent mentioned
    Derwent Innovation (Clarivate) - the gold standard for data quality via Derwent World Patents Index abstracts, which are human-rewritten and dramatically improve recall in chemistry and engineering.
12. Derwent Innovation mentioned
    Derwent Innovation (Clarivate) - the gold standard for data quality via Derwent World Patents Index abstracts, which are human-rewritten and dramatically improve recall in chemistry and engineering.
13. UpCounsel mentioned
    - UpCounsel - patent search cost (https://www.upcounsel.com/patent-search-cost)

Sources the engine cited

The answer, as recorded

Here's how I'd actually approach it. For most small businesses, the right answer is a two-step: do a free DIY screen yourself, then pay a human for a real search only if the idea survives. ## Start here - free, and genuinely good **1. Google Patents** - the first stop for almost everyone. Full-text search across ~100+ jurisdictions, machine translation built in, CPC classification browsing, and the "Similar Documents" panel which is a surprisingly effective poor-man's semantic search. Free, no account. Use it to find the 10-20 closest references before you spend a dollar. **2. USPTO Patent Public Search** - the official US engine. Less pretty than Google, but it's the authoritative US record and it handles proper fielded/Boolean queries plus full prosecution history (file wrappers via Patent Center). Use it when you need to be sure about US status, claims as granted, or what an examiner cited. **3. Espacenet (EPO)** - best for non-US and international coverage, ~150M documents, strong classification tools and family/legal-status views. Pair it with Google Patents; between them you've covered most of what a cheap paid tool would give you. The EPO also runs **PATLIB centres** (320+ across Europe) where trained staff will help with searches, often free or low-cost - a real and underused resource if you're EU-based. **4. Lens.org** - free tier is strong, and it's the best of the free tools for linking patents to scientific literature and for sharing/annotating a collection with a colleague or attorney. Good if your field is biotech, chemistry, or anything academic-adjacent. ## When you're actually deciding whether to file - pay a human **5. A professional patent searcher (freelance or search firm)** - this is the highest-value money a small business spends on search. A defined-scope patentability/novelty search with an analyst-written report runs roughly **$500-$800 for simple mechanical/consumer inventions, $1,000-$1,500 moderate, $2,000-$3,000+ for crowded or software fields**. You're buying classification expertise and non-English/non-patent prior art that keyword search misses - language barriers alone account for a meaningful slice of missed prior art. Firms worth getting quotes from: **Cardinal Intellectual Property**, **Landon IP (CPA Global/Clarivate)**, **Patent Scope Research**, or your attorney's preferred searcher. Avoid the $99 "patent search" outfits bundled with invention-promotion services - different business entirely. **6. Search + attorney opinion package** - $1,000-$5,000, typically $1,500-$3,000 for a moderate US-only opinion. Worth it specifically before you commit to a nonprovisional filing (which is itself $8-15k+ all-in). The search alone tells you what exists; the opinion tells you whether you can get claims around it, which is the question you actually care about. ## Paid software - only if you're searching continuously Skip this tier unless you're doing competitive monitoring, FTO work, or filing several applications a year. Seat licenses are typically four to five figures annually and most vendors won't quote publicly. **7. PatSeer** - the one I'd point a small business to first. It's the most genuinely SMB-oriented of the serious platforms (a majority of its reviews come from companies under 50 employees), offers a free trial and flexible/modular plans rather than enterprise-only contracts, and still gives you full global coverage, semantic search, and landscape analytics. **8. PatSnap** - more polished, strong AI-assisted search and innovation analytics, but positioned at 51-200+ employee companies, per-feature pricing, and the most-cited complaint is add-on module cost. Good if you have budget and want IP plus market/competitive intelligence in one place. **9. Derwent Innovation (Clarivate)** - the gold standard for data quality via Derwent World Patents Index abstracts, which are human-rewritten and dramatically improve recall in chemistry and engineering. Overkill and overpriced for most small businesses; mentioned because if your attorney says "we searched Derwent," that's a real signal. **My recommendation if you want one path:** spend an afternoon in Google Patents + Espacenet. If you find your invention already out there, you've saved thousands. If you don't, commission a ~$800-$1,500 professional novelty search from a searcher before you pay anyone to draft claims. Don't buy software. Sources: - [PatSnap - best patent search tools 2026](https://www.patsnap.com/resources/blog/articles/7-best-patent-search-tools-for-ip-pros-in-2026/) - [PatSeer - free and paid patent databases 2026 guide](https://patseer.com/free-and-paid-patent-databases-2026-complete-guide/) - [EPO - professional patent searching / PATLIB](https://www.epo.org/learning/materials/inventors-handbook/novelty/professional.html) - [G2 - Derwent Innovation vs PatSeer](https://g2.com/compare/derwent-innovation-vs-patseer) - [UpCounsel - patent search cost](https://www.upcounsel.com/patent-search-cost) - [Casrai - patentability search cost](https://www.casrai.org/guides/patentability-search-cost) - [GetApp - PatSnap pricing and company size](https://www.getapp.com/all-software/a/patsnap/) - [PatentPC - top free and paid patent databases for inventors](https://patentpc.com/blog/top-free-and-paid-patent-databases-for-inventors/)

Near this answer

The same question, recorded on other dates: 2026-10-15, 2026-10-13, 2026-10-10, 2026-10-08, 2026-10-06, 2026-10-04, 2026-10-02, 2026-10-01, 2026-09-26, 2026-09-24, 2026-09-22.

patent-search services, asked for other audiences: startups (asked 2026-10-18).

Other categories with a recorded answer: accounting firms, business coaching services, business formation services, compliance consulting firms.

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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.